#321

backend/app/controllers/application_controller.rb

@@ -1,16 +1,14 @@
 class ApplicationController < ActionController::API
-  before_action :reject_banned_ip_address!
   before_action :authenticate_user
-  before_action :reject_banned_user!
 
-  def current_user = @current_user
+  def current_user
+    @current_user
+  end
 
   private
 
   def authenticate_user
     code = request.headers['X-Transfer-Code'] || request.headers['HTTP_X_TRANSFER_CODE']
-    return if code.blank?
-
     @current_user = User.find_by(inheritance_code: code)
   end
 
@@ -24,17 +22,4 @@ class ApplicationController < ActionController::API
       s.in?(['', '1', 'true', 'on', 'yes'])
     end
   end
-
-  def reject_banned_ip_address!
-    ip_address = IpAddress.find_by(ip_address: IPAddr.new(request.remote_ip).hton)
-    return unless ip_address&.banned?
-
-    head :forbidden
-  end
-
-  def reject_banned_user!
-    return unless current_user&.banned?
-
-    head :forbidden
-  end
 end

backend/app/controllers/nico_tags_controller.rb

@@ -33,8 +33,8 @@ class NicoTagsController < ApplicationController
     return head :bad_request unless tag.nico?
 
     linked_tag_names = params[:tags].to_s.split
-    linked_tags = Tag.normalise_tags!(linked_tag_names, with_tagme: false,
-                                                        with_no_deerjikist: false)
+    linked_tags = Tag.normalise_tags(linked_tag_names, with_tagme: false,
+                                                       with_no_deerjikist: false)
     return head :bad_request if linked_tags.any? { |t| t.nico? }
 
     ApplicationRecord.transaction do

backend/app/controllers/posts_controller.rb

@@ -109,7 +109,7 @@ class PostsController < ApplicationController
 
     render json: PostRepr.base(post, current_user)
                          .merge(tags: build_tag_tree_for(post.tags),
-                                related: PostRepr.many(post.related(limit: 20)))
+                                related: post.related(limit: 20))
   end
 
   def create
@@ -123,36 +123,28 @@ class PostsController < ApplicationController
     tag_names = params[:tags].to_s.split
     original_created_from = params[:original_created_from]
     original_created_before = params[:original_created_before]
-    parent_post_ids = parse_parent_post_ids
 
     post = Post.new(title:, url:, thumbnail_base: nil, uploaded_user: current_user,
                     original_created_from:, original_created_before:)
-    post.thumbnail.attach(thumbnail) if thumbnail.present?
+    post.thumbnail.attach(thumbnail)
 
     ApplicationRecord.transaction do
       post.save!
-
-      tags = Tag.normalise_tags!(tag_names)
+      tags = Tag.normalise_tags(tag_names)
       TagVersioning.record_tag_snapshots!(tags, created_by_user: current_user)
 
       tags = Tag.expand_parent_tags(tags)
       sync_post_tags!(post, tags)
-
-      sync_parent_posts!(post, parent_post_ids)
-
       post.resized_thumbnail!
-
       PostVersionRecorder.record!(post:, event_type: :create, created_by_user: current_user)
     end
 
     post.reload
     render json: PostRepr.base(post), status: :created
+  rescue ActiveRecord::RecordInvalid
+    render json: { errors: post.errors.full_messages }, status: :unprocessable_entity
   rescue Tag::NicoTagNormalisationError
     head :bad_request
-  rescue ArgumentError => e
-    render json: { errors: [e.message] }, status: :unprocessable_entity
-  rescue ActiveRecord::RecordInvalid => e
-    render json: { errors: e.record.errors.full_messages }, status: :unprocessable_entity
   end
 
   def viewed
@@ -177,7 +169,6 @@ class PostsController < ApplicationController
     tag_names = params[:tags].to_s.split
     original_created_from = params[:original_created_from]
     original_created_before = params[:original_created_before]
-    parent_post_ids = parse_parent_post_ids
 
     post = Post.find(params[:id].to_i)
 
@@ -186,15 +177,12 @@ class PostsController < ApplicationController
 
       post.update!(title:, original_created_from:, original_created_before:)
 
-      normalised_tags = Tag.normalise_tags!(tag_names, with_tagme: false)
+      normalised_tags = Tag.normalise_tags(tag_names, with_tagme: false)
       TagVersioning.record_tag_snapshots!(normalised_tags, created_by_user: current_user)
 
       tags = post.tags.nico.to_a + normalised_tags
       tags = Tag.expand_parent_tags(tags)
       sync_post_tags!(post, tags)
-
-      sync_parent_posts!(post, parent_post_ids)
-
       PostVersionRecorder.record!(post:, event_type: :update, created_by_user: current_user)
     end
 
@@ -202,12 +190,10 @@ class PostsController < ApplicationController
     json = post.as_json
     json['tags'] = build_tag_tree_for(post.tags)
     render json:, status: :ok
+  rescue ActiveRecord::RecordInvalid
+    render json: post.errors, status: :unprocessable_entity
   rescue Tag::NicoTagNormalisationError
     head :bad_request
-  rescue ArgumentError => e
-    render json: { errors: [e.message] }, status: :unprocessable_entity
-  rescue ActiveRecord::RecordInvalid => e
-    render json: { errors: e.record.errors.full_messages }, status: :unprocessable_entity
   end
 
   def changes
@@ -367,41 +353,4 @@ class PostsController < ApplicationController
 
     root_ids.filter_map { |id| build_node.call(id, []) }
   end
-
-  def parse_parent_post_ids
-    raise ArgumentError, 'parent_post_ids は必須です．' unless params.key?(:parent_post_ids)
-
-    params[:parent_post_ids].to_s.split.map { |token|
-      id = Integer(token, exception: false)
-      raise ArgumentError, "親投稿 Id. が不正です: #{ token }" if id.nil? || id <= 0
-
-      id
-    }.uniq
-  end
-
-  def sync_parent_posts! post, parent_post_ids
-    if parent_post_ids.include?(post.id)
-      post.errors.add(:base, '自分自身を親投稿にはできません．')
-      raise ActiveRecord::RecordInvalid, post
-    end
-
-    existing_ids = Post.where(id: parent_post_ids).pluck(:id)
-    missing_ids = parent_post_ids - existing_ids
-
-    if missing_ids.present?
-      post.errors.add(:base, "存在しない親投稿 ID があります: #{ missing_ids.join(' ') }")
-      raise ActiveRecord::RecordInvalid, post
-    end
-
-    current_ids = post.parent_posts.pluck(:id)
-
-    ids_to_add = parent_post_ids - current_ids
-    ids_to_remove = current_ids - parent_post_ids
-
-    PostImplication.where(post_id: post.id, parent_post_id: ids_to_remove).delete_all
-
-    ids_to_add.each do |parent_post_id|
-      PostImplication.create_or_find_by!(post_id: post.id, parent_post_id:)
-    end
-  end
 end

backend/app/controllers/tags_controller.rb

@@ -1,7 +1,3 @@
-require 'net/http'
-require 'uri'
-
-
 class TagsController < ApplicationController
   def index
     post_id = params[:post]
@@ -186,8 +182,7 @@ class TagsController < ApplicationController
              .find_by(id: params[:id])
     return head :not_found unless tag
 
-    render json: { tag: TagRepr.base(tag),
-                   deerjikists: DeerjikistRepr.many(tag.deerjikists) }
+    render json: DeerjikistRepr.many(tag.deerjikists)
   end
 
   def deerjikists_by_name
@@ -199,31 +194,7 @@ class TagsController < ApplicationController
              .find_by(tag_names: { name: })
     return head :not_found unless tag
 
-    render json: { tag: TagRepr.base(tag),
-                   deerjikists: DeerjikistRepr.many(tag.deerjikists) }
-  end
-
-  def update_deerjikists
-    return head :unauthorized unless current_user
-    return head :forbidden unless current_user.gte_member?
-
-    tag = Tag.joins(:tag_name)
-             .includes(:tag_name, tag_name: :wiki_page)
-             .find_by(id: params[:id])
-    return head :not_found unless tag
-
-    ApplicationRecord.transaction do
-      tag.deerjikists = []
-      params[:_json].each do
-        platform = _1[:platform]
-        code = normalise_deerjikist_code(platform, _1[:code])
-        deerjikist = Deerjikist.find_or_initialize_by(platform:, code:)
-        deerjikist.tag = tag
-        deerjikist.save!
-      end
-    end
-
-    render json: DeerjikistRepr.many(tag.reload.deerjikists)
+    render json: DeerjikistRepr.many(tag.deerjikists)
   end
 
   def materials_by_name
@@ -267,26 +238,18 @@ class TagsController < ApplicationController
       TagVersioning.ensure_snapshot!(tag, created_by_user: current_user)
 
       old_name = tag.name
-      name_changed = name != old_name
-      wiki_page = tag.tag_name.wiki_page if name_changed
 
       tag.update!(category:)
       tag.tag_name.update!(name:)
 
-      alias_names << old_name if name_changed
+      alias_names << old_name if name != old_name
       alias_names.delete(name)
 
       update_aliases!(tag, alias_names)
       update_parent_tags!(tag, parent_names)
 
       tag.reload
-
-      record_tag_version!(
-          tag,
-          event_type: :update,
-          created_by_user: current_user,
-          name_changed:,
-          wiki_page:)
+      record_tag_version!(tag, event_type: :update, created_by_user: current_user)
     end
 
     render json: TagRepr.base(tag.reload)
@@ -309,21 +272,10 @@ class TagsController < ApplicationController
     ApplicationRecord.transaction do
       TagVersioning.ensure_snapshot!(tag, created_by_user: current_user)
 
-      old_name = tag.name
-      name_changed = name.present? && name != old_name
-      wiki_page = tag.tag_name.wiki_page if name_changed
-
       tag.tag_name.update!(name:) if name.present?
       tag.update!(category:) if category.present?
 
-      tag.reload
-
-      record_tag_version!(
-          tag,
-          event_type: :update,
-          created_by_user: current_user,
-          name_changed:,
-          wiki_page:)
+      record_tag_version!(tag, event_type: :update, created_by_user: current_user)
     end
 
     render json: TagRepr.base(tag.reload)
@@ -345,47 +297,17 @@ class TagsController < ApplicationController
         material: material.as_json&.merge(file:, content_type:))
   end
 
-  def record_tag_version! tag, event_type:, created_by_user:, name_changed: false, wiki_page: nil
+  def record_tag_version! tag, event_type:, created_by_user:
     if tag.nico?
       NicoTagVersionRecorder.record!(tag:, event_type:, created_by_user:)
-      return
+    else
+      TagVersionRecorder.record!(tag:, event_type:, created_by_user:)
     end
-
-    TagVersionRecorder.record!(tag:, event_type:, created_by_user:)
-
-    return unless name_changed
-
-    wiki_page ||= tag.tag_name.wiki_page
-    return unless wiki_page&.wiki_versions&.exists?
-
-    WikiVersionRecorder.record!(
-        page: wiki_page,
-        event_type: :update,
-        created_by_user:)
   end
 
   def update_aliases! tag, alias_names
-    alias_names = alias_names.uniq
-
-    affected_tags = [tag]
-
     current_aliases = tag.tag_name.aliases.to_a
 
-    current_aliases.each do |alias_tag_name|
-      next if alias_names.include?(alias_tag_name.name)
-
-      affected_tags << alias_tag_name.canonical&.tag
-    end
-
-    alias_names.each do |alias_name|
-      alias_tag_name = TagName.find_undiscard_or_create_by!(name: alias_name)
-      affected_tags << alias_tag_name.canonical&.tag
-    end
-
-    affected_tags.compact.uniq.each do |affected_tag|
-      TagVersioning.ensure_snapshot!(affected_tag, created_by_user: current_user)
-    end
-
     current_aliases.each do |alias_tag_name|
       next if alias_names.include?(alias_tag_name.name)
 
@@ -396,16 +318,12 @@ class TagsController < ApplicationController
       alias_tag_name = TagName.find_undiscard_or_create_by!(name: alias_name)
       alias_tag_name.update!(canonical: tag.tag_name)
     end
-
-    affected_tags.compact.uniq.each do |affected_tag|
-      record_tag_version!(affected_tag, event_type: :update, created_by_user: current_user)
-    end
   end
 
   def update_parent_tags! tag, parent_names
-    parent_tags = Tag.normalise_tags!(parent_names, with_tagme: false,
-                                                    with_no_deerjikist: false,
-                                                    deny_nico: true)
+    parent_tags = Tag.normalise_tags(parent_names, with_tagme: false,
+                                                   with_no_deerjikist: false,
+                                                   deny_nico: true)
 
     old_parent_tags = tag.parents.to_a
 
@@ -420,21 +338,4 @@ class TagsController < ApplicationController
       TagImplication.create!(tag:, parent_tag:)
     end
   end
-
-  def normalise_deerjikist_code platform, code
-    return code if platform != 'youtube' || code[0] != '@'
-
-    url = "https://www.youtube.com/#{ code }"
-
-    html = Net::HTTP.get(URI(url))
-
-    canonical = html[
-        /<link rel="canonical" href="https:\/\/www\.youtube\.com\/channel\/(UC[a-zA-Z0-9_-]{22})"/,
-        1]
-    return canonical if canonical
-
-    html[/"channelId":"(UC[a-zA-Z0-9_-]{22})"/, 1] || html[/\bUC[a-zA-Z0-9_-]{22}\b/]
-  rescue
-    nil
-  end
 end

backend/app/controllers/users_controller.rb

@@ -1,22 +1,18 @@
 class UsersController < ApplicationController
   def create
-    user = nil
-    User.transaction do
-      user = User.create!(inheritance_code: SecureRandom.uuid, role: :guest)
-      attach_ip_address!(user)
-    end
-
+    user = User.create!(inheritance_code: SecureRandom.uuid, role: 'guest')
     render json: { code: user.inheritance_code,
-                   user: user.slice(:id, :name, :inheritance_code, :role) },
-           status: :created
+                   user: user.slice(:id, :name, :inheritance_code, :role) }
   end
 
   def verify
+    ip_bin = IPAddr.new(request.remote_ip).hton
+    ip_address = IpAddress.find_or_create_by!(ip_address: ip_bin)
+
     user = User.find_by(inheritance_code: params[:code])
     return render json: { valid: false } unless user
-    return head :forbidden if user.banned?
 
-    attach_ip_address!(user)
+    UserIp.find_or_create_by!(user:, ip_address:)
 
     render json: { valid: true, user: user.slice(:id, :name, :inheritance_code, :role) }
   end
@@ -45,18 +41,9 @@ class UsersController < ApplicationController
     return head :bad_request if name.blank?
 
     if user.update(name:)
-      render json: user.slice(:id, :name, :inheritance_code, :role), status: :ok
+      render json: user.slice(:id, :name, :inheritance_code, :role), status: :created
     else
       render json: user.errors, status: :unprocessable_entity
     end
   end
-
-  private
-
-  def attach_ip_address! user
-    ip_bin = IPAddr.new(request.remote_ip).hton
-    ip_address = IpAddress.create_or_find_by!(ip_address: ip_bin)
-
-    UserIp.create_or_find_by!(user:, ip_address:)
-  end
 end

backend/app/controllers/wiki_assets_controller.rb

@@ -1,39 +0,0 @@
-require 'digest'
-
-
-class WikiAssetsController < ApplicationController
-  def index
-    page_id = params[:wiki_page_id].to_i
-    page = WikiPage.find_by(id: page_id)
-    return head :not_found unless page
-
-    render json: WikiAssetRepr.many(page.assets)
-  end
-
-  def create
-    return head :unauthorized unless current_user
-    return head :forbidden unless current_user.gte_member?
-
-    wiki_page_id = params[:wiki_page_id].to_i
-    page = WikiPage.find_by(id: wiki_page_id)
-    return head :not_found unless page
-
-    file = params[:file]
-    return head :bad_request if file.blank?
-
-    asset = nil
-    page.with_lock do
-      no = page.next_asset_no
-      alt_text = params[:alt_text].presence
-      sha256 = Digest::SHA256.file(file.tempfile.path).digest
-
-      asset = WikiAsset.new(wiki_page_id:, no:, alt_text:, sha256:, created_by_user: current_user)
-      asset.file.attach(file)
-      asset.save!
-
-      page.update!(next_asset_no: no + 1)
-    end
-
-    render json: WikiAssetRepr.base(asset)
-  end
-end

backend/app/controllers/wiki_pages_controller.rb

@@ -85,62 +85,38 @@ class WikiPagesController < ApplicationController
     return head :unauthorized unless current_user
     return head :forbidden unless current_user.gte_member?
 
-    title = params[:title].to_s.strip
+    name = params[:title]&.strip
     body = params[:body].to_s
-    message = params[:message].presence
 
-    return head :unprocessable_entity if title.blank? || body.blank?
+    return head :unprocessable_entity if name.blank? || body.blank?
 
-    tag_name = TagName.find_undiscard_or_create_by!(name: title)
+    tag_name = TagName.find_undiscard_or_create_by!(name:)
+    page = WikiPage.new(tag_name:, created_user: current_user, updated_user: current_user)
+    if page.save
+      message = params[:message].presence
+      Wiki::Commit.content!(page:, body:, created_user: current_user, message:)
 
-    page =
-        Wiki::Commit.create_content!(
-            tag_name:,
-            body:,
-            created_by_user: current_user,
-            message:)
-
-    render json: WikiPageRepr.base(page), status: :created
-  rescue ActiveRecord::RecordInvalid, ActiveRecord::RecordNotUnique
-    head :unprocessable_entity
+      render json: WikiPageRepr.base(page), status: :created
+    else
+      render json: { errors: page.errors.full_messages },
+             status: :unprocessable_entity
+    end
   end
 
   def update
     return head :unauthorized unless current_user
     return head :forbidden unless current_user.gte_member?
 
-    title = params[:title].to_s.strip
+    title = params[:title]&.strip
     body = params[:body].to_s
 
     return head :unprocessable_entity if title.blank? || body.blank?
 
     page = WikiPage.find(params[:id])
-    base_revision_id = params[:base_revision_id].presence
+    base_revision_id = page.current_revision.id
 
-    ApplicationRecord.transaction do
-      page.lock!
-
-      old_title = page.title
-
-      tag = Tag.find_by(tag_name_id: page.tag_name_id)
-
-      if tag && title != old_title
-        TagVersioning.ensure_snapshot!(tag, created_by_user: current_user)
-      end
-
-      page.tag_name.update!(name: title) if title != old_title
-
-      message = params[:message].presence
-      Wiki::Commit.content!(page:,
-                            body:,
-                            created_user: current_user,
-                            message:,
-                            base_revision_id:)
-
-      if tag && title != old_title
-        tag.reload
-        TagVersionRecorder.record!(tag:, event_type: :update, created_by_user: current_user)
-      end
+    if params[:title].present? && params[:title].strip != page.title
+      return head :unprocessable_entity
     end
 
     message = params[:message].presence
@@ -150,7 +126,7 @@ class WikiPagesController < ApplicationController
                           message:,
                           base_revision_id:)
 
-    render json: WikiPageRepr.base(page).merge(body:)
+    head :ok
   end
 
   def search

backend/app/models/ip_address.rb

@@ -1,10 +1,6 @@
 class IpAddress < ApplicationRecord
   validates :ip_address, presence: true, length: { maximum: 16 }
+  validates :banned, inclusion: { in: [true, false] }
 
-  has_many :user_ips, dependent: :destroy
-  has_many :users, through: :user_ips
-
-  def banned? = banned_at.present?
-  def ban! = banned? || update!(banned_at: Time.current)
-  def unban! = update!(banned_at: nil)
+  has_many :users
 end

backend/app/models/post.rb

@@ -1,6 +1,7 @@
 class Post < ApplicationRecord
   require 'mini_magick'
 
+  belongs_to :parent, class_name: 'Post', optional: true, foreign_key: 'parent_id'
   belongs_to :uploaded_user, class_name: 'User', optional: true
 
   has_many :post_tags, dependent: :destroy, inverse_of: :post
@@ -12,20 +13,6 @@ class Post < ApplicationRecord
   has_many :post_similarities, dependent: :delete_all
   has_many :post_versions
 
-  has_many :parent_post_implications,
-           class_name: 'PostImplication',
-           foreign_key: :post_id,
-           dependent: :destroy,
-           inverse_of: :post
-  has_many :parents, through: :parent_post_implications, source: :parent_post
-
-  has_many :child_post_implications,
-           class_name: 'PostImplication',
-           foreign_key: :parent_post_id,
-           dependent: :destroy,
-           inverse_of: :parent_post
-  has_many :children, through: :child_post_implications, source: :post
-
   has_one_attached :thumbnail
 
   before_validation :normalise_url
@@ -35,29 +22,17 @@ class Post < ApplicationRecord
   validate :validate_original_created_range
   validate :url_must_be_http_url
 
-  def parent_posts = parents
-
-  def child_posts = children
-
-  def sibling_posts
-    parent_post_ids = parent_posts.order(:id).pluck(:id)
-
-    parent_post_ids.to_h { [_1, PostImplication.where(parent_post: _1).map(&:post)] }
-  end
-
   def as_json options = { }
-    super(options).merge(thumbnail: thumbnail.attached? ?
-                                    Rails.application.routes.url_helpers.rails_blob_url(
-                                        thumbnail, only_path: false) :
-                                    nil)
+    super(options).merge({ thumbnail: thumbnail.attached? ?
+                                      Rails.application.routes.url_helpers.rails_blob_url(
+                                          thumbnail, only_path: false) :
+                                      nil })
   rescue
     super(options).merge(thumbnail: nil)
   end
 
   def snapshot_tag_names = tags.joins(:tag_name).order('tag_names.name').pluck('tag_names.name')
 
-  def snapshot_parent_post_ids = parents.order(:id).pluck(:id)
-
   def related limit: nil
     ids = post_similarities.order(cos: :desc)
     ids = ids.limit(limit) if limit

backend/app/models/post_implication.rb

@@ -1,19 +0,0 @@
-class PostImplication < ApplicationRecord
-  self.primary_key = :post_id, :parent_post_id
-
-  belongs_to :post, inverse_of: :parent_post_implications
-  belongs_to :parent_post, class_name: 'Post', inverse_of: :child_post_implications
-
-  validates :post_id, presence: true, uniqueness: { scope: :parent_post_id }
-  validates :parent_post_id, presence: true
-
-  validate :parent_post_mustnt_be_itself
-
-  private
-
-  def parent_post_mustnt_be_itself
-    if parent_post_id == post_id
-      errors.add :parent_post_id, '親投稿に同じ投稿を設定することはできません．'
-    end
-  end
-end

backend/app/models/post_version.rb

@@ -2,6 +2,7 @@ class PostVersion < ApplicationRecord
   include VersionRecord
 
   belongs_to :post
+  belongs_to :parent, class_name: 'Post', optional: true
 
   validates :url, presence: true
 

backend/app/models/tag.rb

@@ -79,18 +79,15 @@ class Tag < ApplicationRecord
 
   def material_id = materials.first&.id
 
-  def has_deerjikists = deerjikists.present?
-
   def self.tagme = find_or_create_by_tag_name!('タグ希望', category: :meta)
   def self.bot = find_or_create_by_tag_name!('bot操作', category: :meta)
   def self.no_deerjikist = find_or_create_by_tag_name!('ニジラー情報不詳', category: :meta)
   def self.video = find_or_create_by_tag_name!('動画', category: :meta)
   def self.niconico = find_or_create_by_tag_name!('ニコニコ', category: :meta)
-  def self.youtube = find_or_create_by_tag_name!('YouTube', category: :meta)
 
-  def self.normalise_tags! tag_names, with_tagme: true,
-                                      with_no_deerjikist: true,
-                                      deny_nico: true
+  def self.normalise_tags tag_names, with_tagme: true,
+                                     with_no_deerjikist: true,
+                                     deny_nico: true
     if deny_nico && tag_names.any? { |n| n.downcase.start_with?('nico:') }
       raise NicoTagNormalisationError
     end

backend/app/models/user.rb

@@ -4,6 +4,7 @@ class User < ApplicationRecord
   validates :name, length: { maximum: 255 }
   validates :inheritance_code, presence: true, length: { maximum: 64 }
   validates :role, presence: true, inclusion: { in: roles.keys }
+  validates :banned, inclusion: { in: [true, false] }
 
   has_many :created_posts,
            class_name: 'Post', foreign_key: :uploaded_user_id, dependent: :nullify
@@ -18,10 +19,5 @@ class User < ApplicationRecord
            class_name: 'WikiPage', foreign_key: :updated_user_id, dependent: :nullify
 
   def viewed?(post) = user_post_views.exists?(post_id: post.id)
-
   def gte_member? = member? || admin?
-
-  def banned? = banned_at.present?
-  def ban! = banned? || update!(banned_at: Time.current)
-  def unban! = update!(banned_at: nil)
 end

backend/app/models/wiki_asset.rb

@@ -1,12 +0,0 @@
-class WikiAsset < ApplicationRecord
-  belongs_to :wiki_page
-  belongs_to :created_by_user, class_name: 'User'
-
-  has_one_attached :file
-
-  validates :file, presence: true
-
-  def url
-    Rails.application.routes.url_helpers.rails_blob_url(file, only_path: true)
-  end
-end

backend/app/models/wiki_page.rb

@@ -13,13 +13,8 @@ class WikiPage < ApplicationRecord
            foreign_key: :redirect_page_id,
            dependent: :nullify
 
-  has_many :assets, class_name: 'WikiAsset', dependent: :destroy
-
-  has_many :wiki_versions
-
   belongs_to :tag_name
   validates :tag_name, presence: true
-  validates :body, presence: true
 
   def title = tag_name.name
 
@@ -29,6 +24,11 @@ class WikiPage < ApplicationRecord
 
   def current_revision = wiki_revisions.order(id: :desc).first
 
+  def body
+    rev = current_revision
+    rev.body if rev&.content?
+  end
+
   def resolve_redirect limit: 10
     page = self
     visited = Set.new

backend/app/models/wiki_version.rb

@@ -1,8 +0,0 @@
-class WikiVersion < ApplicationRecord
-  include VersionRecord
-
-  belongs_to :wiki_page
-
-  validates :title, presence: true
-  validates :body, presence: true
-end

backend/app/representations/post_repr.rb

@@ -2,8 +2,7 @@
 
 
 module PostRepr
-  BASE = { include: { tags: TagRepr::BASE, uploaded_user: UserRepr::BASE },
-           methods: [:parent_posts, :child_posts, :sibling_posts] }.freeze
+  BASE = { include: { tags: TagRepr::BASE, uploaded_user: UserRepr::BASE } }.freeze
 
   module_function
 

backend/app/representations/tag_repr.rb

@@ -3,7 +3,7 @@
 
 module TagRepr
   BASE = { only: [:id, :category, :post_count, :created_at, :updated_at],
-           methods: [:name, :has_wiki, :material_id, :has_deerjikists] }.freeze
+           methods: [:name, :has_wiki, :material_id] }.freeze
 
   module_function
 

backend/app/representations/wiki_asset_repr.rb

@@ -1,16 +0,0 @@
-# frozen_string_literal: true
-
-
-module WikiAssetRepr
-  BASE = { only: [:wiki_page_id, :no], methods: [:url] }.freeze
-
-  module_function
-
-  def base wiki_asset
-    wiki_asset.as_json(BASE)
-  end
-
-  def many wiki_assets
-    wiki_assets.map { |a| base(a) }
-  end
-end

backend/app/services/post_version_recorder.rb

@@ -24,7 +24,7 @@ class PostVersionRecorder < VersionRecorder
       url: @record.url,
       thumbnail_base: @record.thumbnail_base,
       tags: @record.snapshot_tag_names.join(' '),
-      parent_post_ids: @record.snapshot_parent_post_ids.join(' '),
+      parent_id: @record.parent_id,
       original_created_from: @record.original_created_from,
       original_created_before: @record.original_created_before }
   end

backend/app/services/wiki/commit.rb

@@ -7,31 +7,6 @@ module Wiki
       ;
     end
 
-    def self.create_content! tag_name:, body:, created_by_user:, message: nil
-      normalised = normalise_body(body)
-
-      page = WikiPage.new(tag_name:,
-                          body: normalised,
-                          created_user: created_by_user,
-                          updated_user: created_by_user)
-
-      if normalised.blank?
-        page.errors.add(:body, :blank)
-        raise ActiveRecord::RecordInvalid, page
-      end
-
-      ActiveRecord::Base.transaction do
-        page.save!
-
-        new(page:, created_user: created_by_user).content!(
-            body: normalised,
-            message:,
-            base_revision_id: nil)
-
-        page
-      end
-    end
-
     def self.content! page:, body:, created_user:, message: nil, base_revision_id: nil
       new(page:, created_user:).content!(body:, message:, base_revision_id:)
     end
@@ -46,12 +21,7 @@ module Wiki
     end
 
     def content! body:, message:, base_revision_id:
-      normalised = self.class.normalise_body(body)
-      if normalised.blank?
-        @page.errors.add(:body, :blank)
-        raise ActiveRecord::RecordInvalid, @page
-      end
-
+      normalised = normalise_body(body)
       lines = split_lines(normalised)
 
       line_shas = lines.map { |line| Digest::SHA256.hexdigest(line) }
@@ -67,19 +37,10 @@ module Wiki
           current_id = @page.wiki_revisions.maximum(:id)
           if current_id && current_id != base_revision_id.to_i
             raise Conflict,
-                "競合が発生してゐます" +
-                "（現在の Id.：#{ current_id }，ベース Id.：#{ base_revision_id }）．"
+                "競合が発生してゐます（現在の Id.：#{ current_id }，ベース Id.：#{ base_revision_id }）．"
           end
         end
 
-        @page.update!(body: normalised)
-
-        WikiVersionRecorder.record!(
-            page: @page,
-            event_type: @page.wiki_versions.exists? ? :update : :create,
-            reason: message,
-            created_by_user: @created_user)
-
         rev = WikiRevision.create!(
             wiki_page:        @page,
             base_revision_id:,
@@ -93,45 +54,65 @@ module Wiki
         rows = line_ids.each_with_index.map do |line_id, pos|
           { wiki_revision_id: rev.id, wiki_line_id: line_id, position: pos }
         end
-        WikiRevisionLine.insert_all!(rows) if rows.any?
+        WikiRevisionLine.insert_all!(rows)
 
         rev
       end
     end
 
-    def redirect!(redirect_page:, message:, base_revision_id:) = raise '廃止しました．'
+    def redirect! redirect_page:, message:, base_revision_id:
+      ActiveRecord::Base.transaction do
+        @page.lock!
 
-    def self.normalise_body body
-      s = body.to_s
-      s.gsub!(/\r\n?/, "\n")
-      s.encode('UTF-8', invalid: :replace, undef: :replace, replace: '🖕')
-      s.gsub(/\n+$/, '')
+        if base_revision_id.present?
+          current_id = @page.wiki_revisions.maximum(:id)
+          if current_id && current_id != base_revision_id.to_i
+            raise Conflict,
+                "競合が発生してゐます（現在の Id.：#{ current_id }，ベース Id.：#{ base_revision_id }）．"
+          end
+        end
+
+        WikiRevision.create!(
+            wiki_page:        @page,
+            base_revision_id:,
+            created_user:     @created_user,
+            kind:             :redirect,
+            redirect_page:,
+            message:,
+            lines_count:      0,
+            tree_sha256:      nil)
+      end
     end
 
     private
 
-    def split_lines(body) = body.split("\n")
+    def normalise_body body
+      s = body.to_s
+      s.gsub!("\r\n", "\n")
+      s.encode('UTF-8', invalid: :replace, undef: :replace, replace: '🖕')
+    end
+
+    def split_lines body
+      body.split("\n")
+    end
 
     def upsert_lines! lines, line_shas
       now = Time.current
 
       id_by_sha = WikiLine.where(sha256: line_shas).pluck(:sha256, :id).to_h
 
-      missing_by_sha = { }
-
+      missing_rows = []
       line_shas.each_with_index do |sha, i|
         next if id_by_sha.key?(sha)
-        next if missing_by_sha.key?(sha)
 
-        missing_by_sha[sha] = {
-            sha256:     sha,
-            body:       lines[i],
-            created_at: now,
-            updated_at: now }
+        missing_rows << { sha256:     sha,
+                          body:       lines[i],
+                          created_at: now,
+                          updated_at: now }
       end
 
-      if missing_by_sha.any?
-        WikiLine.upsert_all(missing_by_sha.values)
+      if missing_rows.any?
+        WikiLine.upsert_all(missing_rows)
         id_by_sha = WikiLine.where(sha256: line_shas).pluck(:sha256, :id).to_h
       end
 

backend/app/services/wiki_version_recorder.rb

@@ -1,21 +0,0 @@
-class WikiVersionRecorder < VersionRecorder
-  def self.record! page:, event_type:, reason: nil, created_by_user:
-    new(page:, event_type:, reason:, created_by_user:).record!
-  end
-
-  def initialize page:, event_type:, reason: nil, created_by_user:
-    @reason = reason
-    super(record: page, event_type:, created_by_user:)
-  end
-
-  private
-
-  def version_class = WikiVersion
-  def version_association = :wiki_versions
-  def record_key = :wiki_page
-
-  def snapshot_attributes = {
-      title: @record.title,
-      body: @record.body,
-      reason: @reason }
-end

backend/app/services/youtube/api_client.rb

@@ -1,73 +0,0 @@
-require 'json'
-require 'net/http'
-require 'uri'
-
-
-module Youtube
-  class ApiClient
-    ENDPOINT = 'https://www.googleapis.com/youtube/v3'
-
-    def initialize api_key: ENV.fetch('YOUTUBE_API_KEY')
-      @api_key = api_key
-    end
-
-    def search_videos q:, published_after: nil, published_before: nil, page_token: nil
-      get_json('/search', {
-          part:           'snippet',
-          type:           'video',
-          q:,
-          order:          'date',
-          maxResults:     50,
-          regionCode:     'JP',
-          relevanceLanguage: 'ja',
-          publishedAfter: published_after&.iso8601,
-          publishedBefore: published_before&.iso8601,
-          pageToken:      page_token }.compact)
-    end
-
-    def videos ids
-      return { 'items' => [] } if ids.empty?
-
-      get_json('/videos', part: 'snippet,status,contentDetails', id: ids.join(','))
-    end
-
-    def playlist_items playlist_id:, page_token: nil
-      get_json('/playlistItems', {
-          part:       'snippet,contentDetails,status',
-          playlistId: playlist_id,
-          maxResults: 50,
-          pageToken:  page_token }.compact)
-    end
-
-    def channel id: nil, handle: nil
-      raise ArgumentError, 'id or handle is required' if id.present? == handle.present?
-
-      params = { part: 'snippet,contentDetails' }
-      params[:id] = id if id.present?
-      params[:forHandle] = handle if handle.present?
-
-      get_json('/channels', params)
-    end
-
-    private
-
-    def get_json path, params
-      uri = URI(ENDPOINT + path)
-      uri.query = URI.encode_www_form(params.merge(key: @api_key))
-
-      response = Net::HTTP.start(uri.host,
-                                 uri.port,
-                                 use_ssl: true,
-                                 open_timeout: 10,
-                                 read_timeout: 30) do |http|
-        http.get(uri)
-      end
-
-      unless response.is_a?(Net::HTTPSuccess)
-        raise "YouTube API error: #{ response.code } #{ response.body }"
-      end
-
-      JSON.parse(response.body)
-    end
-  end
-end

backend/app/services/youtube/sync.rb

@@ -1,168 +0,0 @@
-require 'open-uri'
-require 'set'
-require 'time'
-
-
-module Youtube
-  class Sync
-    def initialize client: ApiClient.new
-      @client = client
-    end
-
-    def sync!
-      video_ids = discover_video_ids
-      return if video_ids.empty?
-
-      video_ids.each_slice(50) do |ids|
-        @client.videos(ids).fetch('items', []).each do |item|
-          sync_video!(VideoItem.new(item))
-        end
-      end
-    end
-
-    private
-
-    def discover_video_ids
-      ids = Set.new
-
-      query_terms.each do |q|
-        response = @client.search_videos(q:, published_after: sync_since)
-
-        response.fetch('items', []).each do |item|
-          video_id = item.dig('id', 'videoId')
-          ids << video_id if video_id.present?
-        end
-      end
-
-      playlist_ids.each do |playlist_id|
-        each_playlist_item(playlist_id) do |item|
-          video_id = item.dig('contentDetails', 'videoId')
-          video_id ||= item.dig('snippet', 'resourceId', 'videoId')
-
-          ids << video_id if video_id.present?
-        end
-      end
-
-      ids.to_a
-    end
-
-    def sync_video! video
-      post = Post.where('url REGEXP ?', youtube_url_regexp(video.id)).first
-
-      original_created_from = video.published_at.change(sec: 0)
-      original_created_before = original_created_from + 1.minute
-
-      post_created = false
-      post_changed = false
-
-      if post
-        post.assign_attributes(title: video.title,
-                               original_created_from:,
-                               original_created_before:,
-                               thumbnail_base: video.thumbnail_url)
-
-        post_changed = post.changed?
-        post.save! if post_changed
-
-        attach_thumbnail_if_needed!(post, video.thumbnail_url)
-      else
-        post_created = true
-        post = Post.create!(
-            title: video.title,
-            url: video.url,
-            thumbnail_base: video.thumbnail_url,
-            uploaded_user_id: nil,
-            original_created_from:,
-            original_created_before:)
-
-        attach_thumbnail_if_needed!(post, video.thumbnail_url)
-
-        sync_post_tags!(post, [Tag.tagme.id, Tag.bot.id, Tag.youtube.id, Tag.video.id])
-      end
-
-      kept_tag_ids = post.tags.pluck(:id).to_set
-      desired_tag_ids = kept_tag_ids.to_a
-
-      deerjikist = Deerjikist.find_by(platform: :youtube, code: video.channel_id)
-      if deerjikist
-        desired_tag_ids.delete(Tag.no_deerjikist.id)
-        desired_tag_ids << deerjikist.tag_id
-      elsif post.tags.where(category: :deerjikist).none?
-        desired_tag_ids << Tag.no_deerjikist.id
-      end
-
-      desired_tag_ids.uniq!
-
-      sync_post_tags!(post, desired_tag_ids, current_tag_ids: kept_tag_ids)
-
-      if post_created
-        PostVersionRecorder.record!(post:, event_type: :create, created_by_user: nil)
-      elsif post_changed || kept_tag_ids != desired_tag_ids.to_set
-        PostVersionRecorder.ensure_snapshot!(post, created_by_user: nil)
-        PostVersionRecorder.record!(post:, event_type: :update, created_by_user: nil)
-      end
-    end
-
-    def sync_post_tags! post, desired_tag_ids, current_tag_ids: nil
-      current_tag_ids ||= PostTag.kept.where(post_id: post.id).pluck(:tag_id).to_set
-      desired_tag_ids = desired_tag_ids.compact.to_set
-
-      to_add = desired_tag_ids - current_tag_ids
-      to_remove = current_tag_ids - desired_tag_ids
-
-      Tag.where(id: to_add.to_a).find_each do |tag|
-        begin
-          PostTag.create!(post:, tag:)
-        rescue ActiveRecord::RecordNotUnique
-          ;
-        end
-      end
-
-      PostTag.where(post_id: post.id, tag_id: to_remove.to_a).kept.find_each do |pt|
-        pt.discard_by!(nil)
-      end
-    end
-
-    def attach_thumbnail_if_needed! post, thumbnail_url
-      return if post.thumbnail.attached?
-      return if thumbnail_url.blank?
-
-      post.thumbnail.attach(
-          io:           URI.open(thumbnail_url),
-          filename:     File.basename(URI.parse(thumbnail_url).path),
-          content_type: 'image/jpeg')
-
-      post.resized_thumbnail!
-    end
-
-    def youtube_url_regexp id
-      escaped = Regexp.escape(id)
-      "(youtube\\.com/watch\\?v=#{ escaped }|youtu\\.be/#{ escaped })([^A-Za-z0-9_-]|$)"
-    end
-
-    def query_terms = ['ぼざろクリーチャーシリーズ', '伊地知ニジカ', '伊地知虹鹿']
-
-    def playlist_ids
-      ['PLrOch4zHkI5vu29b-f9umUQQ4tQkuWLPX',
-       'PLrOch4zHkI5vOK0RaytQq6PbucxQkkL0K',
-       'PLrOch4zHkI5tdwm9vSegiDQJOM-hgpcOC']
-    end
-
-    def sync_since = 14.days.ago
-
-    def each_playlist_item playlist_id
-      page_token = nil
-
-      loop do
-        response = @client.playlist_items(playlist_id:, page_token:)
-
-        response.fetch('items', []).each do |item|
-          yield item
-        end
-
-        page_token = response['nextPageToken']
-        break if page_token.blank?
-      end
-    end
-  end
-end

backend/app/services/youtube/video_item.rb

@@ -1,32 +0,0 @@
-require 'time'
-
-
-module Youtube
-  class VideoItem
-    attr_reader :id, :title, :channel_id, :published_at, :thumbnail_url, :raw_tags
-
-    def initialize item
-      snippet = item.fetch('snippet')
-
-      @id = item.fetch('id')
-      @title = snippet['title']
-      @channel_id = snippet['channelId']
-      @published_at = Time.iso8601(snippet['publishedAt'])
-      @thumbnail_url = pick_thumbnail(snippet['thumbnails'] || { })
-      @raw_tags = snippet['tags'] || []
-    end
-
-    def url = "https://www.youtube.com/watch?v=#{ @id }"
-
-    private
-
-    def pick_thumbnail thumbnails
-      ['maxres', 'standard', 'high', 'medium', 'default'].each do |key|
-        url = thumbnails.dig(key, 'url')
-        return url if url.present?
-      end
-
-      nil
-    end
-  end
-end

backend/config/routes.rb

@@ -24,7 +24,6 @@ Rails.application.routes.draw do
       patch '', action: :update
 
       get :deerjikists
-      put :deerjikists, action: :update_deerjikists
     end
   end
 
@@ -48,8 +47,6 @@ Rails.application.routes.draw do
       get :exists
       get :diff
     end
-
-    resources :assets, controller: :wiki_assets, only: [:index, :create]
   end
 
   resources :posts, only: [:index, :show, :create, :update] do

backend/config/schedule.rb

@@ -17,11 +17,3 @@ every 1.day, at: '0:00 am' do
   rake 'post_similarity:calc', environment: 'production'
   rake 'tag_similarity:calc', environment: 'production'
 end
-
-every 1.day, at: '7:50 am' do
-  rake 'nico:export', environment: 'production'
-end
-
-every :hour do
-  rake 'post:sync', environment: 'production'
-end

backend/db/migrate/20260323192300_create_wiki_assets.rb

@@ -1,17 +0,0 @@
-class CreateWikiAssets < ActiveRecord::Migration[8.0]
-  def change
-    create_table :wiki_assets do |t|
-      t.references :wiki_page, null: false, foreign_key: true, index: false
-      t.integer :no, null: false
-      t.string :alt_text
-      t.column :sha256, 'binary(32)', null: false
-      t.references :created_by_user, null: false, foreign_key: { to_table: :users }
-      t.timestamps
-    end
-
-    add_index :wiki_assets, [:wiki_page_id, :sha256], unique: true
-    add_index :wiki_assets, [:wiki_page_id, :no], unique: true
-
-    add_column :wiki_pages, :next_asset_no, :integer, null: false, default: 1
-  end
-end

backend/db/migrate/20260426120600_create_wiki_versions.rb

@@ -1,91 +0,0 @@
-class CreateWikiVersions < ActiveRecord::Migration[8.0]
-  class WikiPage < ActiveRecord::Base
-    self.table_name = 'wiki_pages'
-  end
-
-  class WikiRevision < ActiveRecord::Base
-    self.table_name = 'wiki_revisions'
-  end
-
-  class WikiRevisionLine < ActiveRecord::Base
-    self.table_name = 'wiki_revision_lines'
-  end
-
-  class WikiLine < ActiveRecord::Base
-    self.table_name = 'wiki_lines'
-  end
-
-  class WikiVersion < ActiveRecord::Base
-    self.table_name = 'wiki_versions'
-  end
-
-  class TagName < ActiveRecord::Base
-    self.table_name = 'tag_names'
-  end
-
-  def up
-    add_column :wiki_pages, :body, :text, after: :tag_name_id
-
-    create_table :wiki_versions do |t|
-      t.references :wiki_page, null: false, foreign_key: true
-      t.integer :version_no, null: false
-      t.string :event_type, null: false
-      t.string :title, null: false
-      t.text :body, null: false
-      t.text :reason
-      t.datetime :created_at, null: false
-      t.references :created_by_user, foreign_key: { to_table: :users }
-
-      t.index [:wiki_page_id, :version_no], unique: true
-      t.check_constraint 'version_no > 0',
-                         name: 'wiki_versions_version_no_positive'
-      t.check_constraint "event_type IN ('create', 'update', 'discard', 'restore')",
-                         name: 'wiki_versions_event_type_valid'
-    end
-
-    WikiPage.reset_column_information
-    WikiVersion.reset_column_information
-
-    say_with_time 'Backfilling wiki_versions' do
-      WikiPage.find_each do |page|
-        base_revision_id = nil
-        version_no = 1
-        title = TagName.find(page.tag_name_id).name
-        body = nil
-        loop do
-          rev = WikiRevision.where(wiki_page_id: page.id).find_by(base_revision_id:)
-          break unless rev
-
-          body = WikiRevisionLine.where(wiki_revision_id: rev.id).order(:position).map { |wrl|
-            WikiLine.find(wrl.wiki_line_id).body
-          }.join("\n")
-
-          WikiVersion.create!(
-              wiki_page_id: page.id,
-              version_no:,
-              event_type: version_no == 1 ? 'create' : 'update',
-              title:,
-              body:,
-              reason: rev.message,
-              created_at: rev.created_at,
-              created_by_user_id: rev.created_user_id)
-
-          version_no += 1
-          base_revision_id = rev.id
-        end
-        if body
-          page.update!(body:)
-        else
-          page.destroy!
-        end
-      end
-    end
-
-    change_column_null :wiki_pages, :body, false
-  end
-
-  def down
-    drop_table :wiki_versions
-    remove_column :wiki_pages, :body
-  end
-end

backend/db/migrate/20260427214800_create_post_implications.rb

@@ -1,24 +0,0 @@
-class CreatePostImplications < ActiveRecord::Migration[8.0]
-  def up
-    create_table :post_implications, primary_key: [:post_id, :parent_post_id] do |t|
-      t.references :post, null: false, foreign_key: true, index: false
-      t.references :parent_post, null: false, foreign_key: { to_table: :posts }
-      t.timestamps
-
-      t.check_constraint 'post_id <> parent_post_id',
-                         name: 'chk_post_implications_no_self'
-    end
-
-    add_column :post_versions, :parent_post_ids, :text, null: false, after: :parent_id
-    remove_column :post_versions, :parent_id, :bigint
-    remove_reference :posts, :parent, foreign_key: { to_table: :posts }
-  end
-
-  def down
-    add_reference :posts, :parent, foreign_key: { to_table: :posts }, after: :thumbnail_base
-    add_column :post_versions, :parent_id, :bigint, after: :post_id
-    remove_column :post_versions, :parent_post_ids, :text
-
-    drop_table :post_implications
-  end
-end

backend/db/migrate/20260501153900_rename_banned_to_banned_at_in_users_and_ip_addresses.rb

@@ -1,16 +0,0 @@
-class RenameBannedToBannedAtInUsersAndIpAddresses < ActiveRecord::Migration[8.0]
-  def up
-    [:users, :ip_addresses].each do
-      add_column _1, :banned_at, :datetime, after: :banned
-      add_index _1, :banned_at
-      remove_column _1, :banned
-    end
-  end
-
-  def down
-    [:ip_addresses, :users].each do
-      add_column _1, :banned, :boolean, null: false, default: false, after: :banned_at
-      remove_column _1, :banned_at
-    end
-  end
-end

backend/db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[8.0].define(version: 2026_05_01_153900) do
+ActiveRecord::Schema[8.0].define(version: 2026_04_19_035400) do
   create_table "active_storage_attachments", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.string "name", null: false
     t.string "record_type", null: false
@@ -50,10 +50,9 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_01_153900) do
 
   create_table "ip_addresses", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.binary "ip_address", limit: 16, null: false
-    t.datetime "banned_at"
+    t.boolean "banned", default: false, null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
-    t.index ["banned_at"], name: "index_ip_addresses_on_banned_at"
     t.index ["ip_address"], name: "index_ip_addresses_on_ip_address", unique: true
   end
 
@@ -120,15 +119,6 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_01_153900) do
     t.check_constraint "`version_no` > 0", name: "nico_tag_versions_version_no_positive"
   end
 
-  create_table "post_implications", primary_key: ["post_id", "parent_post_id"], charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
-    t.bigint "post_id", null: false
-    t.bigint "parent_post_id", null: false
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
-    t.index ["parent_post_id"], name: "index_post_implications_on_parent_post_id"
-    t.check_constraint "`post_id` <> `parent_post_id`", name: "chk_post_implications_no_self"
-  end
-
   create_table "post_similarities", primary_key: ["post_id", "target_post_id"], charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.bigint "post_id", null: false
     t.bigint "target_post_id", null: false
@@ -165,12 +155,13 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_01_153900) do
     t.string "url", limit: 768, null: false
     t.string "thumbnail_base", limit: 2000
     t.text "tags", null: false
-    t.text "parent_post_ids", null: false
+    t.bigint "parent_id"
     t.datetime "original_created_from"
     t.datetime "original_created_before"
     t.datetime "created_at", null: false
     t.bigint "created_by_user_id"
     t.index ["created_by_user_id"], name: "index_post_versions_on_created_by_user_id"
+    t.index ["parent_id"], name: "index_post_versions_on_parent_id"
     t.index ["post_id", "version_no"], name: "index_post_versions_on_post_id_and_version_no", unique: true
     t.index ["post_id"], name: "index_post_versions_on_post_id"
     t.check_constraint "`event_type` in (_utf8mb4'create',_utf8mb4'update',_utf8mb4'discard',_utf8mb4'restore')", name: "post_versions_event_type_valid"
@@ -181,11 +172,13 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_01_153900) do
     t.string "title"
     t.string "url", limit: 768, null: false
     t.string "thumbnail_base", limit: 2000
+    t.bigint "parent_id"
     t.bigint "uploaded_user_id"
     t.datetime "created_at", null: false
     t.datetime "original_created_from"
     t.datetime "original_created_before"
     t.datetime "updated_at", null: false
+    t.index ["parent_id"], name: "index_posts_on_parent_id"
     t.index ["uploaded_user_id"], name: "index_posts_on_uploaded_user_id"
     t.index ["url"], name: "index_posts_on_url", unique: true
   end
@@ -333,10 +326,9 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_01_153900) do
     t.string "name"
     t.string "inheritance_code", limit: 64, null: false
     t.string "role", null: false
-    t.datetime "banned_at"
+    t.boolean "banned", default: false, null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
-    t.index ["banned_at"], name: "index_users_on_banned_at"
   end
 
   create_table "wiki_assets", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
@@ -362,7 +354,6 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_01_153900) do
 
   create_table "wiki_pages", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.bigint "tag_name_id", null: false
-    t.text "body", null: false
     t.bigint "created_user_id", null: false
     t.bigint "updated_user_id", null: false
     t.datetime "created_at", null: false
@@ -405,22 +396,6 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_01_153900) do
     t.index ["wiki_page_id"], name: "index_wiki_revisions_on_wiki_page_id"
   end
 
-  create_table "wiki_versions", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
-    t.bigint "wiki_page_id", null: false
-    t.integer "version_no", null: false
-    t.string "event_type", null: false
-    t.string "title", null: false
-    t.text "body", null: false
-    t.text "reason"
-    t.datetime "created_at", null: false
-    t.bigint "created_by_user_id"
-    t.index ["created_by_user_id"], name: "index_wiki_versions_on_created_by_user_id"
-    t.index ["wiki_page_id", "version_no"], name: "index_wiki_versions_on_wiki_page_id_and_version_no", unique: true
-    t.index ["wiki_page_id"], name: "index_wiki_versions_on_wiki_page_id"
-    t.check_constraint "`event_type` in (_utf8mb4'create',_utf8mb4'update',_utf8mb4'discard',_utf8mb4'restore')", name: "wiki_versions_event_type_valid"
-    t.check_constraint "`version_no` > 0", name: "wiki_versions_version_no_positive"
-  end
-
   add_foreign_key "active_storage_attachments", "active_storage_blobs", column: "blob_id"
   add_foreign_key "active_storage_variant_records", "active_storage_blobs", column: "blob_id"
   add_foreign_key "material_versions", "materials"
@@ -436,8 +411,6 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_01_153900) do
   add_foreign_key "nico_tag_relations", "tags", column: "nico_tag_id"
   add_foreign_key "nico_tag_versions", "tags"
   add_foreign_key "nico_tag_versions", "users", column: "created_by_user_id"
-  add_foreign_key "post_implications", "posts"
-  add_foreign_key "post_implications", "posts", column: "parent_post_id"
   add_foreign_key "post_similarities", "posts"
   add_foreign_key "post_similarities", "posts", column: "target_post_id"
   add_foreign_key "post_tags", "posts"
@@ -445,7 +418,9 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_01_153900) do
   add_foreign_key "post_tags", "users", column: "created_user_id"
   add_foreign_key "post_tags", "users", column: "deleted_user_id"
   add_foreign_key "post_versions", "posts"
+  add_foreign_key "post_versions", "posts", column: "parent_id"
   add_foreign_key "post_versions", "users", column: "created_by_user_id"
+  add_foreign_key "posts", "posts", column: "parent_id"
   add_foreign_key "posts", "users", column: "uploaded_user_id"
   add_foreign_key "settings", "users"
   add_foreign_key "tag_implications", "tags"
@@ -478,6 +453,4 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_01_153900) do
   add_foreign_key "wiki_revisions", "wiki_pages"
   add_foreign_key "wiki_revisions", "wiki_pages", column: "redirect_page_id"
   add_foreign_key "wiki_revisions", "wiki_revisions", column: "base_revision_id"
-  add_foreign_key "wiki_versions", "users", column: "created_by_user_id"
-  add_foreign_key "wiki_versions", "wiki_pages"
 end

backend/lib/tasks/export_nico.rake

@@ -1,23 +0,0 @@
-namespace :nico do
-  desc 'ニコニコ DB 逆連携'
-  task export: :environment do
-    require 'open3'
-
-    mysql_user = ENV.fetch('MYSQL_USER')
-    mysql_pass = ENV.fetch('MYSQL_PASS')
-    nizika_nico_path = ENV.fetch('NIZIKA_NICO_PATH')
-
-    videos = Post.where('url LIKE ?', '%nicovideo.jp/watch/%').pluck(:url).filter_map {
-      _1[%r{nicovideo\.jp/watch/([^/?#]+)}, 1]
-    }.uniq
-
-    next if videos.empty?
-
-    _, stderr, status = Open3.capture3(
-        { 'MYSQL_USER' => mysql_user, 'MYSQL_PASS' => mysql_pass },
-        'python3', '-m', 'tracked_videos.put_bulk_upsert', *videos,
-        chdir: nizika_nico_path)
-
-    raise stderr unless status.success?
-  end
-end

backend/lib/tasks/sync_posts.rake

@@ -1,6 +0,0 @@
-namespace :post do
-  desc '投稿同期（ニコニコ以外）'
-  task sync: :environment do
-    Youtube::Sync.new.sync!
-  end
-end

backend/spec/factories/ip_addresses.rb

@@ -1,10 +0,0 @@
-FactoryBot.define do
-  factory :ip_address do
-    ip_address { IPAddr.new('203.0.113.10').hton }
-    banned_at { nil }
-
-    trait :banned do
-      banned_at { Time.current }
-    end
-  end
-end

backend/spec/factories/users.rb

@@ -1,24 +1,15 @@
 FactoryBot.define do
   factory :user do
-    name { nil }
+    name { "test-user" }
     inheritance_code { SecureRandom.uuid }
-    role { 'guest' }
-    banned_at { nil }
-
-    trait :guest do
-      role { 'guest' }
-    end
+    role { "guest" }
 
     trait :member do
-      role { 'member' }
+      role { "member" }
     end
 
     trait :admin do
       role { 'admin' }
     end
-
-    trait :banned do
-      banned_at { Time.current }
-    end
   end
 end

backend/spec/factories/wiki_pages.rb

@@ -3,7 +3,5 @@ FactoryBot.define do
     title { "TestPage" }
     association :created_user, factory: :user
     association :updated_user, factory: :user
-
-    body { ' ' }
   end
 end

backend/spec/models/post_implication_spec.rb

@@ -1,51 +0,0 @@
-require 'rails_helper'
-
-RSpec.describe PostImplication, type: :model do
-  let!(:post_record) do
-    Post.create!(
-      title: 'post',
-      url: 'https://example.com/post-implication-post'
-    )
-  end
-
-  let!(:parent_post) do
-    Post.create!(
-      title: 'parent post',
-      url: 'https://example.com/post-implication-parent'
-    )
-  end
-
-  it 'is valid with post and parent_post' do
-    implication = described_class.new(
-      post: post_record,
-      parent_post:
-    )
-
-    expect(implication).to be_valid
-  end
-
-  it 'does not allow same post as parent_post' do
-    implication = described_class.new(
-      post: post_record,
-      parent_post: post_record
-    )
-
-    expect(implication).not_to be_valid
-    expect(implication.errors[:parent_post_id]).to be_present
-  end
-
-  it 'does not allow duplicate pair' do
-    described_class.create!(
-      post: post_record,
-      parent_post:
-    )
-
-    duplicate = described_class.new(
-      post: post_record,
-      parent_post:
-    )
-
-    expect(duplicate).not_to be_valid
-    expect(duplicate.errors[:post_id]).to be_present
-  end
-end

backend/spec/models/post_version_spec.rb

@@ -19,7 +19,7 @@ RSpec.describe PostVersion, type: :model do
       url: post_record.url,
       thumbnail_base: post_record.thumbnail_base,
       tags: post_record.snapshot_tag_names.join(' '),
-      parent_post_ids: post_record.snapshot_parent_post_ids.join(' '),
+      parent: post_record.parent,
       original_created_from: post_record.original_created_from,
       original_created_before: post_record.original_created_before,
       created_at: Time.current,

backend/spec/models/tag_spec.rb

@@ -107,13 +107,11 @@ RSpec.describe Tag, type: :model do
     context 'when the source tag_name has a wiki_page' do
       let!(:source_post_tag) { PostTag.create!(post: post_record, tag: source_tag) }
       let!(:wiki_page) do
-        admin = create_admin_user!
-
-        Wiki::Commit.create_content!(
-            tag_name: source_tag_name,
-            body: 'source wiki body',
-            created_by_user: admin,
-            message: 'init')
+        WikiPage.create!(
+          tag_name: source_tag_name,
+          created_user: create_admin_user!,
+          updated_user: create_admin_user!
+        )
       end
 
       it 'rolls back the transaction' do
@@ -161,7 +159,7 @@ RSpec.describe Tag, type: :model do
         url: post.url,
         thumbnail_base: post.thumbnail_base,
         tags: snapshot_tags(post),
-        parent_post_ids: post.snapshot_parent_post_ids.join(' '),
+        parent: post.parent,
         original_created_from: post.original_created_from,
         original_created_before: post.original_created_before,
         created_at: Time.current,

backend/spec/requests/posts_spec.rb

@@ -15,31 +15,6 @@ RSpec.describe 'Posts API', type: :request do
     Rack::Test::UploadedFile.new(StringIO.new('dummy'), 'image/jpeg', original_filename: 'dummy.jpg')
   end
 
-  def post_write_params params = { }
-    { parent_post_ids: '' }.merge(params)
-  end
-
-  def create_parent_post! title:, url:
-    Post.create!(title:, url:)
-  end
-
-  def create_post_version_for! post
-    PostVersion.create!(
-      post:,
-      version_no: 1,
-      event_type: 'create',
-      title: post.title,
-      url: post.url,
-      thumbnail_base: post.thumbnail_base,
-      tags: post.snapshot_tag_names.join(' '),
-      parent_post_ids: post.snapshot_parent_post_ids.join(' '),
-      original_created_from: post.original_created_from,
-      original_created_before: post.original_created_before,
-      created_at: post.created_at,
-      created_by_user: post.uploaded_user
-    )
-  end
-
   let!(:tag_name) { TagName.create!(name: 'spec_tag') }
   let!(:tag)      { Tag.create!(tag_name: tag_name, category: :general) }
 
@@ -482,65 +457,6 @@ RSpec.describe 'Posts API', type: :request do
         expect(json).to have_key('viewed')
         expect([true, false]).to include(json['viewed'])
       end
-
-      context 'when post has parent, child, and sibling posts' do
-        let!(:parent_post) do
-          create_parent_post!(
-            title: 'shared parent post',
-            url: 'https://example.com/shared-parent-post'
-          )
-        end
-
-        let!(:child_post) do
-          Post.create!(
-            title: 'child post',
-            url: 'https://example.com/show-child-post'
-          )
-        end
-
-        let!(:sibling_post) do
-          Post.create!(
-            title: 'sibling post',
-            url: 'https://example.com/show-sibling-post'
-          )
-        end
-
-        before do
-          PostImplication.create!(
-            post: post_record,
-            parent_post:
-          )
-
-          PostImplication.create!(
-            post: child_post,
-            parent_post: post_record
-          )
-
-          PostImplication.create!(
-            post: sibling_post,
-            parent_post:
-          )
-        end
-
-        it 'returns parent_posts, child_posts, and sibling_posts' do
-          get "/posts/#{post_record.id}"
-
-          expect(response).to have_http_status(:ok)
-
-          parent_ids = json.fetch('parent_posts').map { |p| p.fetch('id') }
-          child_ids = json.fetch('child_posts').map { |p| p.fetch('id') }
-
-          expect(parent_ids).to include(parent_post.id)
-          expect(child_ids).to include(child_post.id)
-
-          sibling_posts_by_parent = json.fetch('sibling_posts')
-          siblings = sibling_posts_by_parent.fetch(parent_post.id.to_s)
-
-          sibling_ids = siblings.map { |p| p.fetch('id') }
-          expect(sibling_ids).to include(post_record.id)
-          expect(sibling_ids).to include(sibling_post.id)
-        end
-      end
     end
 
     context 'when post does not exist' do
@@ -559,28 +475,25 @@ RSpec.describe 'Posts API', type: :request do
 
     it '401 when not logged in' do
       sign_out
-      post '/posts', params: post_write_params(title: 't', url: 'https://example.com/x', tags: 'a',
-                                               thumbnail: dummy_upload)
-
+      post '/posts', params: { title: 't', url: 'https://example.com/x', tags: 'a', thumbnail: dummy_upload }
       expect(response).to have_http_status(:unauthorized)
     end
 
     it '403 when not member' do
       sign_in_as(create(:user, role: 'guest'))
-      post '/posts', params: post_write_params(title: 't', url: 'https://example.com/x', tags: 'a',
-                                               thumbnail: dummy_upload)
+      post '/posts', params: { title: 't', url: 'https://example.com/x', tags: 'a', thumbnail: dummy_upload }
       expect(response).to have_http_status(:forbidden)
     end
 
     it '201 and creates post + tags when member' do
       sign_in_as(member)
 
-      post '/posts', params: post_write_params(
+      post '/posts', params: {
         title: 'new post',
         url: 'https://example.com/new',
         tags: 'spec_tag', # 既存タグ名を投げる
         thumbnail: dummy_upload
-      )
+      }
 
       expect(response).to have_http_status(:created)
       expect(json).to include('id', 'title', 'url')
@@ -594,12 +507,12 @@ RSpec.describe 'Posts API', type: :request do
     it '201 and creates post + tags when member and tags have aliases' do
       sign_in_as(member)
 
-      post '/posts', params: post_write_params(
+      post '/posts', params: {
         title: 'new post',
         url: 'https://example.com/new',
         tags: 'manko', # 既存タグ名を投げる
         thumbnail: dummy_upload
-      )
+      }
 
       expect(response).to have_http_status(:created)
       expect(json).to include('id', 'title', 'url')
@@ -620,14 +533,13 @@ RSpec.describe 'Posts API', type: :request do
       it 'return 400' do
         sign_in_as(member)
 
-        post '/posts', params: post_write_params(
-          title: 'new post',
-          url: 'https://example.com/nico-tag-post',
-          tags: 'nico:nico_tag',
-          thumbnail: dummy_upload
-        )
+        post '/posts', params: {
+            title: 'new post',
+            url: 'https://example.com/nico_tag',
+            tags: 'nico:nico_tag',
+            thumbnail: dummy_upload }
 
-        expect(response).to have_http_status(:bad_request), response.body
+        expect(response).to have_http_status(:bad_request)
       end
     end
 
@@ -635,11 +547,11 @@ RSpec.describe 'Posts API', type: :request do
       it 'returns 422' do
         sign_in_as(member)
 
-        post '/posts', params: post_write_params(
+        post '/posts', params: {
             title: 'new post',
             url: '   ',
             tags: 'spec_tag', # 既存タグ名を投げる
-            thumbnail: dummy_upload)
+            thumbnail: dummy_upload }
 
         expect(response).to have_http_status(:unprocessable_entity)
       end
@@ -649,154 +561,14 @@ RSpec.describe 'Posts API', type: :request do
       it 'returns 422' do
         sign_in_as(member)
 
-        post '/posts', params: post_write_params(
-            title: 'new post',
-            url: 'ぼざクリタグ広場',
-            tags: 'spec_tag', # 既存タグ名を投げる
-            thumbnail: dummy_upload)
-
-        expect(response).to have_http_status(:unprocessable_entity)
-      end
-    end
-
-    context 'when parent_post_ids is provided' do
-      let!(:parent_post_1) do
-        create_parent_post!(
-          title: 'parent post 1',
-          url: 'https://example.com/parent-post-1'
-        )
-      end
-
-      let!(:parent_post_2) do
-        create_parent_post!(
-          title: 'parent post 2',
-          url: 'https://example.com/parent-post-2'
-        )
-      end
-
-      it 'creates post implications for parent posts' do
-        sign_in_as(member)
-
-        expect {
-          post '/posts', params: {
-              title: 'child post',
-              url: 'https://example.com/child-post',
-              tags: 'spec_tag',
-              parent_post_ids: "#{parent_post_1.id} #{parent_post_2.id}",
-              thumbnail: dummy_upload }
-        }.to change(PostImplication, :count).by(2)
-
-        expect(response).to have_http_status(:created)
-
-        created_post = Post.find(json.fetch('id'))
-        expect(created_post.parent_posts.order(:id).pluck(:id)).to eq(
-          [parent_post_1.id, parent_post_2.id].sort
-        )
-
-        expect(PostImplication.exists?(
-          post_id: created_post.id,
-          parent_post_id: parent_post_1.id
-        )).to be(true)
-
-        expect(PostImplication.exists?(
-          post_id: created_post.id,
-          parent_post_id: parent_post_2.id
-        )).to be(true)
-      end
-
-      it 'deduplicates parent_post_ids' do
-        sign_in_as(member)
-
-        expect {
-          post '/posts', params: post_write_params(
-            title: 'dedup child post',
-            url: 'https://example.com/dedup-child-post',
-            tags: 'spec_tag',
-            parent_post_ids: "#{parent_post_1.id} #{parent_post_1.id}",
-            thumbnail: dummy_upload
-          )
-        }.to change(PostImplication, :count).by(1)
-
-        expect(response).to have_http_status(:created)
-
-        created_post = Post.find(json.fetch('id'))
-        expect(created_post.parent_posts.pluck(:id)).to eq([parent_post_1.id])
-      end
-
-      it 'records parent_post_ids in post version' do
-        sign_in_as(member)
-
-        post '/posts', params: post_write_params(
-          title: 'versioned child post',
-          url: 'https://example.com/versioned-child-post',
-          tags: 'spec_tag',
-          parent_post_ids: "#{parent_post_1.id} #{parent_post_2.id}",
+        post '/posts', params: {
+          title: 'new post',
+          url: 'ぼざクリタグ広場',
+          tags: 'spec_tag', # 既存タグ名を投げる
           thumbnail: dummy_upload
-        )
-
-        expect(response).to have_http_status(:created)
-
-        created_post = Post.find(json.fetch('id'))
-        version = PostVersion.find_by!(post: created_post, version_no: 1)
-
-        expect(version.parent_post_ids.split.map(&:to_i)).to eq(
-          [parent_post_1.id, parent_post_2.id].sort
-        )
-      end
-    end
-
-    context 'when parent_post_ids is missing' do
-      it 'returns 422' do
-        sign_in_as(member)
-
-        expect {
-          post '/posts', params: {
-              title: 'missing parent_post_ids',
-              url: 'https://example.com/missing-parent-post-ids',
-              tags: 'spec_tag',
-              thumbnail: dummy_upload }
-        }.not_to change(Post, :count)
+        }
 
         expect(response).to have_http_status(:unprocessable_entity)
-        expect(json.fetch('errors')).to be_present
-      end
-    end
-
-    context 'when parent_post_ids includes invalid token' do
-      it 'returns 422 and does not create post' do
-        sign_in_as(member)
-
-        expect {
-          post '/posts', params: post_write_params(
-            title: 'invalid parent ids',
-            url: 'https://example.com/invalid-parent-ids',
-            tags: 'spec_tag',
-            parent_post_ids: 'abc',
-            thumbnail: dummy_upload
-          )
-        }.not_to change(Post, :count)
-
-        expect(response).to have_http_status(:unprocessable_entity)
-        expect(json.fetch('errors')).to be_present
-      end
-    end
-
-    context 'when parent_post_ids includes nonexistent post id' do
-      it 'returns 422 and does not create post implication' do
-        sign_in_as(member)
-
-        expect {
-          post '/posts', params: post_write_params(
-            title: 'missing parent post',
-            url: 'https://example.com/missing-parent-post',
-            tags: 'spec_tag',
-            parent_post_ids: '999999999',
-            thumbnail: dummy_upload
-          )
-        }.not_to change(PostImplication, :count)
-
-        expect(response).to have_http_status(:unprocessable_entity)
-        expect(json.fetch('errors')).to be_present
       end
     end
   end
@@ -806,13 +578,13 @@ RSpec.describe 'Posts API', type: :request do
 
     it '401 when not logged in' do
       sign_out
-      put "/posts/#{post_record.id}", params: post_write_params(title: 'updated', tags: 'spec_tag')
+      put "/posts/#{post_record.id}", params: { title: 'updated', tags: 'spec_tag' }
       expect(response).to have_http_status(:unauthorized)
     end
 
     it '403 when not member' do
       sign_in_as(create(:user, role: 'guest'))
-      put "/posts/#{post_record.id}", params: post_write_params(title: 'updated', tags: 'spec_tag')
+      put "/posts/#{post_record.id}", params: { title: 'updated', tags: 'spec_tag' }
       expect(response).to have_http_status(:forbidden)
     end
 
@@ -823,9 +595,10 @@ RSpec.describe 'Posts API', type: :request do
       tn2 = TagName.create!(name: 'spec_tag_2')
       Tag.create!(tag_name: tn2, category: :general)
 
-      put "/posts/#{post_record.id}", params: post_write_params(
-          title: 'updated title',
-          tags: 'spec_tag_2')
+      put "/posts/#{post_record.id}", params: {
+        title: 'updated title',
+        tags: 'spec_tag_2'
+      }
 
       expect(response).to have_http_status(:ok)
       expect(json).to have_key('tags')
@@ -846,178 +619,11 @@ RSpec.describe 'Posts API', type: :request do
       it 'return 400' do
         sign_in_as(member)
 
-        put "/posts/#{post_record.id}", params: post_write_params(
-          title: 'updated title',
-          tags: 'nico:nico_tag'
-        )
-
-        expect(response).to have_http_status(:bad_request), response.body
-      end
-    end
-
-    context 'when parent_post_ids is provided' do
-      let!(:old_parent_post) do
-        create_parent_post!(
-          title: 'old parent post',
-          url: 'https://example.com/old-parent-post'
-        )
-      end
-
-      let!(:new_parent_post_1) do
-        create_parent_post!(
-          title: 'new parent post 1',
-          url: 'https://example.com/new-parent-post-1'
-        )
-      end
-
-      let!(:new_parent_post_2) do
-        create_parent_post!(
-          title: 'new parent post 2',
-          url: 'https://example.com/new-parent-post-2'
-        )
-      end
-
-      before do
-        PostImplication.create!(
-          post: post_record,
-          parent_post: old_parent_post
-        )
-      end
-
-      it 'replaces parent posts' do
-        sign_in_as(member)
-
-        put "/posts/#{post_record.id}", params: post_write_params(
-          title: 'updated title',
-          tags: 'spec_tag',
-          parent_post_ids: "#{new_parent_post_1.id} #{new_parent_post_2.id}"
-        )
-
-        expect(response).to have_http_status(:ok)
-
-        expect(post_record.reload.parent_posts.order(:id).pluck(:id)).to eq(
-          [new_parent_post_1.id, new_parent_post_2.id].sort
-        )
-
-        expect(PostImplication.exists?(
-          post_id: post_record.id,
-          parent_post_id: old_parent_post.id
-        )).to be(false)
-      end
-
-      it 'clears parent posts when parent_post_ids is blank' do
-        sign_in_as(member)
-
-        put "/posts/#{post_record.id}", params: post_write_params(
-          title: 'updated title',
-          tags: 'spec_tag',
-          parent_post_ids: ''
-        )
-
-        expect(response).to have_http_status(:ok)
-        expect(post_record.reload.parent_posts).to be_empty
-      end
-
-      it 'records changed parent_post_ids in post version' do
-        sign_in_as(member)
-        create_post_version_for!(post_record.reload)
-
-        put "/posts/#{post_record.id}", params: post_write_params(
-          title: 'updated title',
-          tags: 'spec_tag',
-          parent_post_ids: "#{new_parent_post_1.id} #{new_parent_post_2.id}"
-        )
-
-        expect(response).to have_http_status(:ok)
-
-        version = post_record.reload.post_versions.order(:version_no).last
-
-        expect(version.version_no).to eq(2)
-        expect(version.parent_post_ids.split.map(&:to_i)).to eq(
-          [new_parent_post_1.id, new_parent_post_2.id].sort
-        )
-      end
-    end
-
-    context 'when parent_post_ids is missing' do
-      it 'returns 422' do
-        sign_in_as(member)
-
-        put "/posts/#{post_record.id}", params: {
+        put "/posts/#{ post_record.id }", params: {
             title: 'updated title',
-            tags: 'spec_tag' }
+            tags: 'nico:nico_tag' }
 
-        expect(response).to have_http_status(:unprocessable_entity)
-        expect(json.fetch('errors')).to be_present
-      end
-    end
-
-    context 'when parent_post_ids includes invalid token' do
-      it 'returns 422 and does not change parent posts' do
-        sign_in_as(member)
-
-        parent_post = create_parent_post!(
-          title: 'valid parent post',
-          url: 'https://example.com/valid-parent-post'
-        )
-
-        PostImplication.create!(
-          post: post_record,
-          parent_post:
-        )
-
-        put "/posts/#{post_record.id}", params: post_write_params(
-          title: 'updated title',
-          tags: 'spec_tag',
-          parent_post_ids: 'abc'
-        )
-
-        expect(response).to have_http_status(:unprocessable_entity)
-        expect(post_record.reload.parent_posts.pluck(:id)).to eq([parent_post.id])
-      end
-    end
-
-    context 'when parent_post_ids includes nonexistent post id' do
-      it 'returns 422 and does not change parent posts' do
-        sign_in_as(member)
-
-        parent_post = create_parent_post!(
-          title: 'existing parent post',
-          url: 'https://example.com/existing-parent-post'
-        )
-
-        PostImplication.create!(
-          post: post_record,
-          parent_post:
-        )
-
-        put "/posts/#{post_record.id}", params: post_write_params(
-          title: 'updated title',
-          tags: 'spec_tag',
-          parent_post_ids: '999999999'
-        )
-
-        expect(response).to have_http_status(:unprocessable_entity)
-        expect(post_record.reload.parent_posts.pluck(:id)).to eq([parent_post.id])
-      end
-    end
-
-    context 'when parent_post_ids includes self id' do
-      it 'returns 422 and does not create self implication' do
-        sign_in_as(member)
-
-        put "/posts/#{post_record.id}", params: post_write_params(
-          title: 'updated title',
-          tags: 'spec_tag',
-          parent_post_ids: post_record.id.to_s
-        )
-
-        expect(response).to have_http_status(:unprocessable_entity)
-
-        expect(PostImplication.exists?(
-          post_id: post_record.id,
-          parent_post_id: post_record.id
-        )).to be(false)
+        expect(response).to have_http_status(:bad_request)
       end
     end
   end
@@ -1167,20 +773,20 @@ RSpec.describe 'Posts API', type: :request do
       post.snapshot_tag_names.join(' ')
     end
 
-    def create_post_version! post, version_no:, event_type:, created_by_user:, created_at:
+    def create_post_version!(post, version_no:, event_type:, created_by_user:, created_at:)
       PostVersion.create!(
-        post:,
-        version_no:,
-        event_type:,
+        post: post,
+        version_no: version_no,
+        event_type: event_type,
         title: post.title,
         url: post.url,
         thumbnail_base: post.thumbnail_base,
         tags: snapshot_tags(post),
-        parent_post_ids: post.snapshot_parent_post_ids.join(' '),
+        parent: post.parent,
         original_created_from: post.original_created_from,
         original_created_before: post.original_created_before,
-        created_at:,
-        created_by_user:
+        created_at: created_at,
+        created_by_user: created_by_user
       )
     end
 
@@ -1418,6 +1024,7 @@ RSpec.describe 'Posts API', type: :request do
         url: post.url,
         thumbnail_base: post.thumbnail_base,
         tags: snapshot_tags(post),
+        parent: post.parent,
         original_created_from: post.original_created_from,
         original_created_before: post.original_created_before,
         created_at: post.created_at,
@@ -1429,11 +1036,12 @@ RSpec.describe 'Posts API', type: :request do
       sign_in_as(member)
 
       expect do
-        post '/posts', params: post_write_params(
-            title: 'versioned post',
-            url: 'https://example.com/versioned-post',
-            tags: 'spec_tag',
-            thumbnail: dummy_upload)
+        post '/posts', params: {
+          title: 'versioned post',
+          url: 'https://example.com/versioned-post',
+          tags: 'spec_tag',
+          thumbnail: dummy_upload
+        }
       end.to change(PostVersion, :count).by(1)
 
       expect(response).to have_http_status(:created)
@@ -1456,9 +1064,10 @@ RSpec.describe 'Posts API', type: :request do
       Tag.create!(tag_name: tag_name2, category: :general)
 
       expect do
-        put "/posts/#{post_record.id}", params: post_write_params(
-            title: 'updated title',
-            tags: 'spec_tag_2')
+        put "/posts/#{post_record.id}", params: {
+          title: 'updated title',
+          tags: 'spec_tag_2'
+        }
       end.to change(PostVersion, :count).by(1)
 
       expect(response).to have_http_status(:ok)
@@ -1478,9 +1087,10 @@ RSpec.describe 'Posts API', type: :request do
       create_post_version_for!(post_record.reload)
 
       expect {
-        put "/posts/#{post_record.id}", params: post_write_params(
-            title: post_record.title,
-            tags: 'spec_tag')
+        put "/posts/#{post_record.id}", params: {
+          title: post_record.title,
+          tags: 'spec_tag'
+        }
       }.not_to change(PostVersion, :count)
       expect(response).to have_http_status(:ok)
 
@@ -1494,11 +1104,12 @@ RSpec.describe 'Posts API', type: :request do
       sign_in_as(member)
 
       expect do
-        post '/posts', params: post_write_params(
-            title: 'invalid post',
-            url: 'ぼざクリタグ広場',
-            tags: 'spec_tag',
-            thumbnail: dummy_upload)
+        post '/posts', params: {
+          title: 'invalid post',
+          url: 'ぼざクリタグ広場',
+          tags: 'spec_tag',
+          thumbnail: dummy_upload
+        }
       end.not_to change(PostVersion, :count)
 
       expect(response).to have_http_status(:unprocessable_entity)
@@ -1509,11 +1120,12 @@ RSpec.describe 'Posts API', type: :request do
       create_post_version_for!(post_record)
 
       expect do
-        put "/posts/#{post_record.id}", params: post_write_params(
-            title: 'updated title',
-            tags: 'spec_tag',
-            original_created_from: Time.zone.local(2020, 1, 2, 0, 0, 0).iso8601,
-            original_created_before: Time.zone.local(2020, 1, 1, 0, 0, 0).iso8601)
+        put "/posts/#{post_record.id}", params: {
+          title: 'updated title',
+          tags: 'spec_tag',
+          original_created_from: Time.zone.local(2020, 1, 2, 0, 0, 0).iso8601,
+          original_created_before: Time.zone.local(2020, 1, 1, 0, 0, 0).iso8601
+        }
       end.not_to change(PostVersion, :count)
 
       expect(response).to have_http_status(:unprocessable_entity)
@@ -1527,11 +1139,12 @@ RSpec.describe 'Posts API', type: :request do
       sign_in_as(member)
 
       expect {
-        post '/posts', params: post_write_params(
-            title: 'tag versioned post',
-            url: 'https://example.com/tag-versioned-post',
-            tags: 'spec_tag',
-            thumbnail: dummy_upload)
+        post '/posts', params: {
+          title: 'tag versioned post',
+          url: 'https://example.com/tag-versioned-post',
+          tags: 'spec_tag',
+          thumbnail: dummy_upload
+        }
       }.to change { tag.reload.tag_versions.count }.by(1)
 
       expect(response).to have_http_status(:created)
@@ -1551,9 +1164,10 @@ RSpec.describe 'Posts API', type: :request do
       tag2 = Tag.create!(tag_name: tag_name2, category: :general)
 
       expect {
-        put "/posts/#{post_record.id}", params: post_write_params(
-            title: 'updated title',
-            tags: 'spec_tag_2')
+        put "/posts/#{post_record.id}", params: {
+          title: 'updated title',
+          tags: 'spec_tag_2'
+        }
       }.to change { tag2.reload.tag_versions.count }.by(1)
 
       expect(response).to have_http_status(:ok)

backend/spec/requests/tag_versions_spec.rb

@@ -214,30 +214,5 @@ RSpec.describe 'TagVersions API', type: :request do
       expect(versions.size).to eq(1)
       expect(versions.first['version_no']).to eq(2)
     end
-
-    it 'does not create tag versions by wiki updates when tag has no versions yet' do
-      wiki_tag_name = TagName.create!(name: 'tag_versions_from_wiki')
-      wiki_tag = Tag.create!(tag_name: wiki_tag_name, category: :general)
-
-      wiki_page =
-          Wiki::Commit.create_content!(
-              tag_name: wiki_tag_name,
-              body: 'before',
-              created_by_user: member,
-              message: 'init')
-
-      Wiki::Commit.content!(
-          page: wiki_page,
-          body: 'after',
-          created_user: member,
-          message: 'edit',
-          base_revision_id: wiki_page.current_revision.id)
-
-      get '/tags/versions', params: { id: wiki_tag.id }
-
-      expect(response).to have_http_status(:ok)
-      expect(json.fetch('versions')).to eq([])
-      expect(json.fetch('count')).to eq(0)
-    end
   end
 end

backend/spec/requests/tag_wiki_history_integrity_spec.rb

@@ -1,160 +0,0 @@
-require 'rails_helper'
-
-RSpec.describe 'Tag and wiki history integrity', type: :request do
-  let(:member_user) { create(:user, role: 'member') }
-
-  def stub_current_user user
-    allow_any_instance_of(ApplicationController).to receive(:current_user).and_return(user)
-  end
-
-  def create_tag! name:, category: :general
-    tag_name = TagName.create!(name:)
-    Tag.create!(tag_name:, category:)
-  end
-
-  def create_wiki_for_tag! tag:, body: 'wiki body', user: member_user
-    Wiki::Commit.create_content!(
-        tag_name: tag.tag_name,
-        body:,
-        created_by_user: user,
-        message: 'init')
-  end
-
-  before do
-    stub_current_user(member_user)
-  end
-
-  describe 'PATCH /tags/:id' do
-    it 'records wiki_version when tag name changes and tag has wiki' do
-      tag = create_tag!(name: 'patch_tag_wiki_before')
-      wiki_page = create_wiki_for_tag!(tag:, body: 'wiki body before')
-
-      expect {
-        patch "/tags/#{ tag.id }", params: {
-          name: 'patch_tag_wiki_after',
-        }
-      }
-          .to change(TagVersion, :count).by(2)
-          .and change(WikiVersion, :count).by(1)
-
-      expect(response).to have_http_status(:ok)
-
-      tag.reload
-      wiki_page.reload
-      version = wiki_page.wiki_versions.order(:version_no).last
-
-      expect(tag.name).to eq('patch_tag_wiki_after')
-      expect(wiki_page.title).to eq('patch_tag_wiki_after')
-
-      expect(version).to have_attributes(
-        event_type: 'update',
-        title: 'patch_tag_wiki_after',
-        body: 'wiki body before',
-        created_by_user_id: member_user.id
-      )
-    end
-
-    it 'does not record wiki_version when only category changes' do
-      tag = create_tag!(name: 'patch_tag_category_only')
-      wiki_page = create_wiki_for_tag!(tag:, body: 'wiki body before')
-
-      before_wiki_versions = wiki_page.wiki_versions.count
-
-      expect {
-        patch "/tags/#{ tag.id }", params: {
-          category: 'meme',
-        }
-      }
-          .to change(TagVersion, :count).by(2)
-
-      expect(response).to have_http_status(:ok)
-
-      tag.reload
-      wiki_page.reload
-
-      expect(tag.name).to eq('patch_tag_category_only')
-      expect(tag.category).to eq('meme')
-      expect(wiki_page.wiki_versions.count).to eq(before_wiki_versions)
-    end
-  end
-
-  describe 'PUT /tags/:id' do
-    it 'records wiki_version when tag name changes and tag has wiki' do
-      tag = create_tag!(name: 'put_tag_wiki_before')
-      wiki_page = create_wiki_for_tag!(tag:, body: 'wiki body before')
-
-      expect {
-        put "/tags/#{ tag.id }", params: {
-          name: 'put_tag_wiki_after',
-          category: 'general',
-          aliases: '',
-          parent_tags: '',
-        }
-      }
-          .to change(TagVersion, :count).by(2)
-          .and change(WikiVersion, :count).by(1)
-
-      expect(response).to have_http_status(:ok)
-
-      tag.reload
-      wiki_page.reload
-      version = wiki_page.wiki_versions.order(:version_no).last
-
-      expect(tag.name).to eq('put_tag_wiki_after')
-      expect(wiki_page.title).to eq('put_tag_wiki_after')
-
-      expect(version).to have_attributes(
-        event_type: 'update',
-        title: 'put_tag_wiki_after',
-        body: 'wiki body before',
-        created_by_user_id: member_user.id
-      )
-    end
-
-    it 'does not record wiki_version when only category changes' do
-      tag = create_tag!(name: 'put_tag_category_only')
-      wiki_page = create_wiki_for_tag!(tag:, body: 'wiki body before')
-
-      before_wiki_versions = wiki_page.wiki_versions.count
-
-      expect {
-        put "/tags/#{ tag.id }", params: {
-          name: 'put_tag_category_only',
-          category: 'meme',
-          aliases: '',
-          parent_tags: '',
-        }
-      }
-          .to change(TagVersion, :count).by(2)
-
-      expect(response).to have_http_status(:ok)
-
-      tag.reload
-      wiki_page.reload
-
-      expect(tag.name).to eq('put_tag_category_only')
-      expect(tag.category).to eq('meme')
-      expect(wiki_page.wiki_versions.count).to eq(before_wiki_versions)
-    end
-
-    it 'does not record wiki_version when only aliases change' do
-      tag = create_tag!(name: 'put_tag_alias_only')
-      wiki_page = create_wiki_for_tag!(tag:, body: 'wiki body before')
-
-      before_wiki_versions = wiki_page.wiki_versions.count
-
-      expect {
-        put "/tags/#{ tag.id }", params: {
-          name: 'put_tag_alias_only',
-          category: 'general',
-          aliases: 'put_tag_alias_only_alias',
-          parent_tags: '',
-        }
-      }
-          .to change(TagVersion, :count).by(2)
-
-      expect(response).to have_http_status(:ok)
-      expect(wiki_page.reload.wiki_versions.count).to eq(before_wiki_versions)
-    end
-  end
-end

backend/spec/requests/tags_deerjikists_spec.rb

@@ -8,35 +8,23 @@ RSpec.describe 'Tags deerjikists API', type: :request do
 
   let!(:tag) { create(:tag, category: :deerjikist) }
 
-  let(:member) { create(:user, :member) }
-  let(:guest) { create(:user, role: :guest) }
-
   before do
+    # show_by_name / deerjikists_by_name 用に名前を固定
     tag.tag_name.update!(name: 'deerjika')
   end
 
   describe 'GET /tags/:id/deerjikists' do
     subject(:do_request) do
-      get "/tags/#{tag_id}/deerjikists"
+      get "/tags/#{ tag_id }/deerjikists"
     end
 
     let(:tag_id) { tag.id }
 
     context 'when tag exists and has no deerjikists' do
-      it 'returns 200 with tag and empty deerjikists array' do
+      it 'returns 200 and empty array' do
         do_request
-
         expect(response).to have_http_status(:ok)
-
-        expect(json).to be_a(Hash)
-
-        expect(json['tag']).to be_a(Hash)
-        expect(json['tag']['id']).to eq(tag.id)
-        expect(json['tag']['name']).to eq('deerjika')
-        expect(json['tag']['category']).to eq('deerjikist')
-        expect(json['tag']['has_deerjikists']).to eq(false)
-
-        expect(json['deerjikists']).to eq([])
+        expect(json).to eq([])
       end
     end
 
@@ -46,27 +34,17 @@ RSpec.describe 'Tags deerjikists API', type: :request do
         Deerjikist.create!(platform: platform2, code: code2, tag: tag)
       end
 
-      it 'returns 200 with tag and deerjikists array' do
+      it 'returns 200 and deerjikists array' do
         do_request
-
         expect(response).to have_http_status(:ok)
 
-        expect(json).to be_a(Hash)
+        expect(json).to be_a(Array)
+        expect(json.size).to eq(2)
 
-        expect(json['tag']).to be_a(Hash)
-        expect(json['tag']['id']).to eq(tag.id)
-        expect(json['tag']['name']).to eq('deerjika')
-        expect(json['tag']['category']).to eq('deerjikist')
-        expect(json['tag']['has_deerjikists']).to eq(true)
-
-        expect(json['deerjikists']).to be_a(Array)
-        expect(json['deerjikists'].size).to eq(2)
-
-        expect(json['deerjikists'].map { |h| [h['platform'], h['code']] })
-          .to contain_exactly(
-            [platform1, code1],
-            [platform2, code2],
-          )
+        expect(json.map { |h| [h['platform'], h['code']] }).to contain_exactly(
+          [platform1, code1],
+          [platform2, code2],
+        )
       end
     end
 
@@ -75,7 +53,6 @@ RSpec.describe 'Tags deerjikists API', type: :request do
 
       it 'returns 404' do
         do_request
-
         expect(response).to have_http_status(:not_found)
       end
     end
@@ -83,7 +60,7 @@ RSpec.describe 'Tags deerjikists API', type: :request do
 
   describe 'GET /tags/name/:name/deerjikists' do
     subject(:do_request) do
-      get "/tags/name/#{name}/deerjikists"
+      get "/tags/name/#{ name }/deerjikists"
     end
 
     let(:name) { 'deerjika' }
@@ -93,7 +70,6 @@ RSpec.describe 'Tags deerjikists API', type: :request do
 
       it 'returns 400' do
         do_request
-
         expect(response).to have_http_status(:bad_request)
       end
     end
@@ -103,209 +79,23 @@ RSpec.describe 'Tags deerjikists API', type: :request do
 
       it 'returns 404' do
         do_request
-
         expect(response).to have_http_status(:not_found)
       end
     end
 
-    context 'when tag exists and has no deerjikists' do
-      it 'returns 200 with tag and empty deerjikists array' do
-        do_request
-
-        expect(response).to have_http_status(:ok)
-
-        expect(json).to be_a(Hash)
-
-        expect(json['tag']).to be_a(Hash)
-        expect(json['tag']['id']).to eq(tag.id)
-        expect(json['tag']['name']).to eq('deerjika')
-        expect(json['tag']['category']).to eq('deerjikist')
-        expect(json['tag']['has_deerjikists']).to eq(false)
-
-        expect(json['deerjikists']).to eq([])
-      end
-    end
-
     context 'when tag exists and has deerjikists' do
       before do
         Deerjikist.create!(platform: platform1, code: code1, tag: tag)
       end
 
-      it 'returns 200 with tag and deerjikists array' do
+      it 'returns 200 and deerjikists array' do
         do_request
-
         expect(response).to have_http_status(:ok)
 
-        expect(json).to be_a(Hash)
-
-        expect(json['tag']).to be_a(Hash)
-        expect(json['tag']['id']).to eq(tag.id)
-        expect(json['tag']['name']).to eq('deerjika')
-        expect(json['tag']['category']).to eq('deerjikist')
-        expect(json['tag']['has_deerjikists']).to eq(true)
-
-        expect(json['deerjikists']).to be_a(Array)
-        expect(json['deerjikists'].size).to eq(1)
-
-        expect(json['deerjikists'][0]['platform']).to eq(platform1)
-        expect(json['deerjikists'][0]['code']).to eq(code1)
-      end
-    end
-  end
-
-  describe 'PUT /tags/:id/deerjikists' do
-    subject(:do_request) do
-      put "/tags/#{tag_id}/deerjikists", params: payload, as: :json
-    end
-
-    let(:tag_id) { tag.id }
-    let(:payload) do
-      [
-        { platform: platform1, code: code1 },
-        { platform: platform2, code: code2 },
-      ]
-    end
-
-    context 'when not logged in' do
-      it 'returns 401' do
-        do_request
-
-        expect(response).to have_http_status(:unauthorized)
-      end
-    end
-
-    context 'when logged in but not member' do
-      before do
-        sign_in_as guest
-      end
-
-      it 'returns 403' do
-        do_request
-
-        expect(response).to have_http_status(:forbidden)
-      end
-    end
-
-    context 'when tag does not exist' do
-      let(:tag_id) { 9_999_999 }
-
-      before do
-        sign_in_as member
-      end
-
-      it 'returns 404' do
-        do_request
-
-        expect(response).to have_http_status(:not_found)
-      end
-    end
-
-    context 'when logged in as member' do
-      before do
-        sign_in_as member
-      end
-
-      context 'when tag has no deerjikists' do
-        it 'creates deerjikists and returns deerjikists array' do
-          expect {
-            do_request
-          }.to change { Deerjikist.where(tag: tag).count }.from(0).to(2)
-
-          expect(response).to have_http_status(:ok)
-
-          expect(json).to be_a(Array)
-          expect(json.map { |h| [h['platform'], h['code']] })
-            .to contain_exactly(
-              [platform1, code1],
-              [platform2, code2],
-            )
-
-          expect(Deerjikist.where(tag: tag).map { |d| [d.platform, d.code] })
-            .to contain_exactly(
-              [platform1, code1],
-              [platform2, code2],
-            )
-        end
-      end
-
-      context 'when tag already has deerjikists' do
-        before do
-          Deerjikist.create!(platform: platform1, code: 'old-code-1', tag: tag)
-          Deerjikist.create!(platform: platform2, code: 'old-code-2', tag: tag)
-        end
-
-        it 'replaces deerjikists and returns deerjikists array' do
-          do_request
-
-          expect(response).to have_http_status(:ok)
-
-          expect(Deerjikist.where(tag: tag).map { |d| [d.platform, d.code] })
-            .to contain_exactly(
-              [platform1, code1],
-              [platform2, code2],
-            )
-
-          expect(Deerjikist.exists?(platform: platform1, code: 'old-code-1')).to eq(false)
-          expect(Deerjikist.exists?(platform: platform2, code: 'old-code-2')).to eq(false)
-
-          expect(json).to be_a(Array)
-          expect(json.map { |h| [h['platform'], h['code']] })
-            .to contain_exactly(
-              [platform1, code1],
-              [platform2, code2],
-            )
-        end
-      end
-
-      context 'when payload is empty array' do
-        let(:payload) { [] }
-
-        before do
-          Deerjikist.create!(platform: platform1, code: code1, tag: tag)
-          Deerjikist.create!(platform: platform2, code: code2, tag: tag)
-        end
-
-        it 'clears deerjikists and returns empty array' do
-          expect {
-            do_request
-          }.to change { Deerjikist.where(tag: tag).count }.from(2).to(0)
-
-          expect(response).to have_http_status(:ok)
-          expect(json).to eq([])
-        end
-      end
-
-      context 'when youtube code is handle' do
-        let(:channel_id) { 'UCabcdefghijklmnopqrstuv' }
-        let(:payload) do
-          [
-            { platform: 'youtube', code: '@deerjika' },
-          ]
-        end
-
-        before do
-          allow(Net::HTTP).to receive(:get).and_return(
-            %(<link rel="canonical" href="https://www.youtube.com/channel/#{channel_id}">),
-          )
-        end
-
-        it 'normalises youtube handle to channel id' do
-          expect {
-            do_request
-          }.to change { Deerjikist.where(tag: tag).count }.from(0).to(1)
-
-          expect(response).to have_http_status(:ok)
-
-          expect(Net::HTTP).to have_received(:get)
-
-          expect(Deerjikist.exists?(platform: 'youtube', code: channel_id, tag: tag))
-            .to eq(true)
-
-          expect(json).to be_a(Array)
-          expect(json.size).to eq(1)
-          expect(json[0]['platform']).to eq('youtube')
-          expect(json[0]['code']).to eq(channel_id)
-        end
+        expect(json).to be_a(Array)
+        expect(json.size).to eq(1)
+        expect(json[0]['platform']).to eq(platform1)
+        expect(json[0]['code']).to eq(code1)
       end
     end
   end

backend/spec/requests/tags_spec.rb

@@ -471,54 +471,6 @@ RSpec.describe 'Tags API', type: :request do
         expect(response).to have_http_status(:unprocessable_entity)
         expect(nico_tag.reload.category).to eq('nico')
       end
-
-      it 'PATCH で tag の name を変更すると対応する wiki version を作成する' do
-        wiki_page =
-            Wiki::Commit.create_content!(
-                tag_name: tag.tag_name,
-                body: 'wiki body before',
-                created_by_user: member_user,
-                message: 'init')
-
-        expect {
-          patch "/tags/#{ tag.id }", params: {
-            name: 'patch_wiki_renamed_tag',
-          }
-        }
-            .to change(TagVersion, :count).by(2)
-            .and change(WikiVersion, :count).by(1)
-
-        expect(response).to have_http_status(:ok)
-
-        version = wiki_page.reload.wiki_versions.order(:version_no).last
-
-        expect(version).to have_attributes(
-          event_type: 'update',
-          title: 'patch_wiki_renamed_tag',
-          body: 'wiki body before',
-          created_by_user_id: member_user.id
-        )
-      end
-
-      it 'tag の category だけを変更しても wiki version は作成しない' do
-        wiki_page =
-            Wiki::Commit.create_content!(
-                tag_name: tag.tag_name,
-                body: 'wiki body before',
-                created_by_user: member_user,
-                message: 'init')
-
-        before_wiki_version_count = wiki_page.reload.wiki_versions.count
-
-        expect {
-          patch "/tags/#{ tag.id }", params: {
-            category: 'meme',
-          }
-        }.to change(TagVersion, :count).by(2)
-
-        expect(response).to have_http_status(:ok)
-        expect(wiki_page.reload.wiki_versions.count).to eq(before_wiki_version_count)
-      end
     end
   end
 
@@ -924,134 +876,6 @@ RSpec.describe 'Tags API', type: :request do
         expect(system_tag.reload.name).to eq(old_name)
         expect(system_tag.category).to eq(old_category)
       end
-
-      it 'wiki を持つ tag を更新すると wiki version も作成する' do
-        wiki_page =
-            Wiki::Commit.create_content!(
-                tag_name: tag.tag_name,
-                body: 'wiki body before',
-                created_by_user: member_user,
-                message: 'init')
-
-        Wiki::Commit.content!(
-          page: wiki_page,
-          body: 'wiki body before',
-          created_user: member_user,
-          message: 'init'
-        )
-
-        expect {
-          put "/tags/#{ tag.id }", params: {
-            name: 'put_wiki_version_tag',
-            category: 'meme',
-            aliases: 'unko',
-            parent_tags: '',
-          }
-        }
-            .to change(TagVersion, :count).by(2)
-            .and change(WikiVersion, :count).by(1)
-
-        expect(response).to have_http_status(:ok)
-
-        version = wiki_page.reload.wiki_versions.order(:version_no).last
-
-        expect(version).to have_attributes(
-          event_type: 'update',
-          title: 'put_wiki_version_tag',
-          body: 'wiki body before',
-          created_by_user_id: member_user.id
-        )
-      end
-
-      it '別名を他 tag から奪った場合、奪はれた側の tag version も作成する' do
-        old_owner = Tag.create!(
-          tag_name: TagName.create!(name: 'put_alias_old_owner'),
-          category: :general
-        )
-        stolen_alias = TagName.create!(
-          name: 'put_stolen_alias',
-          canonical: old_owner.tag_name
-        )
-
-        expect(old_owner.tag_name.aliases.map(&:name)).to include('put_stolen_alias')
-
-        expect {
-          put "/tags/#{ tag.id }", params: {
-            name: 'spec_tag',
-            category: 'general',
-            aliases: 'unko put_stolen_alias',
-            parent_tags: '',
-          }
-        }
-            .to change { tag.reload.tag_versions.count }.by(2)
-            .and change { old_owner.reload.tag_versions.count }.by(2)
-
-        expect(response).to have_http_status(:ok)
-
-        expect(stolen_alias.reload.canonical).to eq(tag.tag_name)
-        expect(old_owner.reload.tag_name.aliases.map(&:name)).not_to include('put_stolen_alias')
-
-        old_owner_versions = old_owner.tag_versions.order(:version_no)
-
-        expect(old_owner_versions.first.event_type).to eq('create')
-        expect(old_owner_versions.first.aliases.split).to include('put_stolen_alias')
-
-        expect(old_owner_versions.second.event_type).to eq('update')
-        expect(old_owner_versions.second.aliases.split).not_to include('put_stolen_alias')
-      end
-
-      it 'parent_tags に指定すると循環する tag は 422 にする' do
-        pending '#332 で対応予定'
-
-        child = Tag.create!(
-          tag_name: TagName.create!(name: 'put_cycle_child'),
-          category: :general
-        )
-
-        TagImplication.create!(tag: child, parent_tag: tag)
-
-        put "/tags/#{ tag.id }", params: {
-          name: 'spec_tag',
-          category: 'general',
-          aliases: 'unko',
-          parent_tags: child.name,
-        }
-
-        expect(response).to have_http_status(:unprocessable_entity)
-
-        expect(TagImplication.where(tag:, parent_tag: child)).not_to exist
-      end
-
-      it 'tag の name を変更すると対応する wiki version を作成する' do
-        wiki_page =
-            Wiki::Commit.create_content!(
-                tag_name: tag.tag_name,
-                body: 'wiki body before',
-                created_by_user: member_user,
-                message: 'init')
-
-        expect {
-          put "/tags/#{ tag.id }", params: {
-            name: 'put_wiki_renamed_tag',
-            category: 'general',
-            aliases: 'unko',
-            parent_tags: '',
-          }
-        }
-            .to change(TagVersion, :count).by(2)
-            .and change(WikiVersion, :count).by(1)
-
-        expect(response).to have_http_status(:ok)
-
-        version = wiki_page.reload.wiki_versions.order(:version_no).last
-
-        expect(version).to have_attributes(
-          event_type: 'update',
-          title: 'put_wiki_renamed_tag',
-          body: 'wiki body before',
-          created_by_user_id: member_user.id
-        )
-      end
     end
   end
 end

backend/spec/requests/users_spec.rb

@@ -1,266 +1,110 @@
-require 'rails_helper'
+require "rails_helper"
 
-RSpec.describe 'Users', type: :request do
-  let(:remote_ip) { '203.0.113.10' }
 
-  before do
-    allow_any_instance_of(ActionDispatch::Request)
-      .to receive(:remote_ip)
-      .and_return(remote_ip)
-  end
-
-  def auth_headers(user)
-    { 'X-Transfer-Code' => user.inheritance_code }
-  end
-
-  describe 'POST /users' do
-    it 'creates guest user, IpAddress and UserIp, and returns code' do
-      expect {
-        post '/users'
-      }.to change(User, :count).by(1)
-        .and change(IpAddress, :count).by(1)
-        .and change(UserIp, :count).by(1)
-
-      expect(response).to have_http_status(:created)
-      expect(json['code']).to be_present
-      expect(json['user']['role']).to eq('guest')
-
-      user = User.last
-      ip_address = IpAddress.find_by(ip_address: IPAddr.new(remote_ip).hton)
-
-      expect(user.role).to eq('guest')
-      expect(ip_address).to be_present
-      expect(UserIp.exists?(user:, ip_address:)).to eq(true)
-    end
-
-    it 'returns 403 and does not create user when current IP address is banned' do
-      IpAddress.create!(
-        ip_address: IPAddr.new(remote_ip).hton,
-        banned_at: Time.current
-      )
-
-      expect {
-        post '/users'
-      }.not_to change(User, :count)
-
-      expect(response).to have_http_status(:forbidden)
-      expect(UserIp.count).to eq(0)
+RSpec.describe "Users", type: :request do
+  describe "POST /users" do
+    it "creates guest user and returns code" do
+      post "/users"
+      expect(response).to have_http_status(:ok)
+      expect(json["code"]).to be_present
+      expect(json["user"]["role"]).to eq("guest")
     end
   end
 
-  describe 'POST /users/code/renew' do
-    it 'returns 401 when not logged in' do
-      post '/users/code/renew'
+  describe "POST /users/code/renew" do
+    it "returns 401 when not logged in" do
+      sign_out
+      post "/users/code/renew"
+      expect(response).to have_http_status(:unauthorized)
+    end
+  end
 
+  describe "PUT /users/:id" do
+    let(:user) { create(:user, name: "old-name", role: "guest") }
+
+    it "returns 401 when current_user id mismatch" do
+      sign_in_as(create(:user))
+      put "/users/#{user.id}", params: { name: "new-name" }
       expect(response).to have_http_status(:unauthorized)
     end
 
-    it 'returns 403 when current user is banned' do
-      user = create(:user, :banned)
-
-      post '/users/code/renew', headers: auth_headers(user)
-
-      expect(response).to have_http_status(:forbidden)
-    end
-
-    it 'returns 403 when current IP address is banned' do
-      user = create(:user)
-
-      IpAddress.create!(
-        ip_address: IPAddr.new(remote_ip).hton,
-        banned_at: Time.current
-      )
-
-      post '/users/code/renew', headers: auth_headers(user)
-
-      expect(response).to have_http_status(:forbidden)
-    end
-  end
-
-  describe 'PUT /users/:id' do
-    let(:user) { create(:user, name: 'old-name', role: 'guest') }
-
-    it 'returns 401 when current_user id mismatch' do
-      other_user = create(:user)
-
-      put "/users/#{user.id}",
-          params: { name: 'new-name' },
-          headers: auth_headers(other_user)
-
-      expect(response).to have_http_status(:unauthorized)
-    end
-
-    it 'returns 400 when name is blank' do
-      put "/users/#{user.id}",
-          params: { name: '   ' },
-          headers: auth_headers(user)
-
+    it "returns 400 when name is blank" do
+      sign_in_as(user)
+      put "/users/#{user.id}", params: { name: "   " }
       expect(response).to have_http_status(:bad_request)
     end
 
-    it 'updates name and returns user slice' do
-      put "/users/#{user.id}",
-          params: { name: 'new-name' },
-          headers: auth_headers(user)
+    it "updates name and returns 201 with user slice" do
+      sign_in_as(user)
+      put "/users/#{user.id}", params: { name: "new-name" }
 
-      expect(response).to have_http_status(:ok)
-      expect(json['id']).to eq(user.id)
-      expect(json['name']).to eq('new-name')
+      expect(response).to have_http_status(:created)
+      expect(json["id"]).to eq(user.id)
+      expect(json["name"]).to eq("new-name")
 
       user.reload
-      expect(user.name).to eq('new-name')
-    end
-
-    it 'returns 403 when current user is banned' do
-      user.update!(banned_at: Time.current)
-
-      put "/users/#{user.id}",
-          params: { name: 'new-name' },
-          headers: auth_headers(user)
-
-      expect(response).to have_http_status(:forbidden)
-
-      user.reload
-      expect(user.name).to eq('old-name')
-    end
-
-    it 'returns 403 when current IP address is banned' do
-      IpAddress.create!(
-        ip_address: IPAddr.new(remote_ip).hton,
-        banned_at: Time.current
-      )
-
-      put "/users/#{user.id}",
-          params: { name: 'new-name' },
-          headers: auth_headers(user)
-
-      expect(response).to have_http_status(:forbidden)
-
-      user.reload
-      expect(user.name).to eq('old-name')
+      expect(user.name).to eq("new-name")
     end
   end
 
-  describe 'POST /users/verify' do
-    it 'returns valid:false when code not found' do
-      post '/users/verify', params: { code: 'nope' }
-
+  describe "POST /users/verify" do
+    it "returns valid:false when code not found" do
+      post "/users/verify", params: { code: "nope" }
       expect(response).to have_http_status(:ok)
-      expect(json['valid']).to eq(false)
+      expect(json["valid"]).to eq(false)
     end
 
-    it 'returns 403 when current IP address is banned' do
-      user = create(:user, inheritance_code: SecureRandom.uuid, role: 'guest')
+    it "creates IpAddress and UserIp, and returns valid:true with user slice" do
+      user = create(:user, inheritance_code: SecureRandom.uuid, role: "guest")
 
-      IpAddress.create!(
-        ip_address: IPAddr.new(remote_ip).hton,
-        banned_at: Time.current
-      )
+      # request.remote_ip を固定
+      allow_any_instance_of(ActionDispatch::Request).to receive(:remote_ip).and_return("203.0.113.10")
 
       expect {
-        post '/users/verify', params: { code: user.inheritance_code }
-      }.not_to change(UserIp, :count)
-
-      expect(response).to have_http_status(:forbidden)
-    end
-
-    it 'returns 403 when verified user is banned' do
-      user = create(
-        :user,
-        :banned,
-        inheritance_code: SecureRandom.uuid,
-        role: 'guest'
-      )
-
-      expect {
-        post '/users/verify', params: { code: user.inheritance_code }
-      }.not_to change(UserIp, :count)
-
-      expect(response).to have_http_status(:forbidden)
-    end
-
-    it 'creates IpAddress and UserIp, and returns valid:true with user slice' do
-      user = create(:user, inheritance_code: SecureRandom.uuid, role: 'guest')
-
-      expect {
-        post '/users/verify', params: { code: user.inheritance_code }
-      }.to change(UserIp, :count).by(1)
-        .and change(IpAddress, :count).by(1)
-
-      expect(response).to have_http_status(:ok)
-      expect(json['valid']).to eq(true)
-      expect(json['user']['id']).to eq(user.id)
-      expect(json['user']['inheritance_code']).to eq(user.inheritance_code)
-      expect(json['user']['role']).to eq('guest')
-
-      ip_address = IpAddress.find_by(ip_address: IPAddr.new(remote_ip).hton)
-      expect(ip_address).to be_present
-      expect(UserIp.exists?(user:, ip_address:)).to eq(true)
-    end
-
-    it 'is idempotent for same user and same IP address' do
-      user = create(:user, inheritance_code: SecureRandom.uuid, role: 'guest')
-
-      post '/users/verify', params: { code: user.inheritance_code }
-      expect(response).to have_http_status(:ok)
-
-      expect {
-        post '/users/verify', params: { code: user.inheritance_code }
-      }.not_to change(UserIp, :count)
-
-      expect(response).to have_http_status(:ok)
-      expect(json['valid']).to eq(true)
-    end
-
-    it 'creates another UserIp for same user and different IP address' do
-      user = create(:user, inheritance_code: SecureRandom.uuid, role: 'guest')
-
-      post '/users/verify', params: { code: user.inheritance_code }
-      expect(response).to have_http_status(:ok)
-
-      allow_any_instance_of(ActionDispatch::Request)
-        .to receive(:remote_ip)
-        .and_return('203.0.113.11')
-
-      expect {
-        post '/users/verify', params: { code: user.inheritance_code }
+        post "/users/verify", params: { code: user.inheritance_code }
       }.to change(UserIp, :count).by(1)
 
       expect(response).to have_http_status(:ok)
-      expect(json['valid']).to eq(true)
+      expect(json["valid"]).to eq(true)
+      expect(json["user"]["id"]).to eq(user.id)
+      expect(json["user"]["inheritance_code"]).to eq(user.inheritance_code)
+      expect(json["user"]["role"]).to eq("guest")
+
+      # ついでに IpAddress もできてることを確認（ipの保存形式がバイナリでも count で見れる）
+      expect(IpAddress.count).to be >= 1
+    end
+
+    it "is idempotent for same user+ip (does not create duplicate UserIp)" do
+      user = create(:user, inheritance_code: SecureRandom.uuid, role: "guest")
+      allow_any_instance_of(ActionDispatch::Request).to receive(:remote_ip).and_return("203.0.113.10")
+
+      post "/users/verify", params: { code: user.inheritance_code }
+      expect(response).to have_http_status(:ok)
+
+      expect {
+        post "/users/verify", params: { code: user.inheritance_code }
+      }.not_to change(UserIp, :count)
+
+      expect(response).to have_http_status(:ok)
+      expect(json["valid"]).to eq(true)
     end
   end
 
-  describe 'GET /users/me' do
-    it 'returns 404 when code not found' do
-      get '/users/me', params: { code: 'nope' }
-
+  describe "GET /users/me" do
+    it "returns 404 when code not found" do
+      get "/users/me", params: { code: "nope" }
       expect(response).to have_http_status(:not_found)
     end
 
-    it 'returns user slice when found' do
-      user = create(:user, inheritance_code: SecureRandom.uuid, name: 'me', role: 'guest')
-
-      get '/users/me', params: { code: user.inheritance_code }
+    it "returns user slice when found" do
+      user = create(:user, inheritance_code: SecureRandom.uuid, name: "me", role: "guest")
+      get "/users/me", params: { code: user.inheritance_code }
 
       expect(response).to have_http_status(:ok)
-      expect(json['id']).to eq(user.id)
-      expect(json['name']).to eq('me')
-      expect(json['inheritance_code']).to eq(user.inheritance_code)
-      expect(json['role']).to eq('guest')
-    end
-
-    it 'returns 403 when current IP address is banned' do
-      user = create(:user, inheritance_code: SecureRandom.uuid)
-
-      IpAddress.create!(
-        ip_address: IPAddr.new(remote_ip).hton,
-        banned_at: Time.current
-      )
-
-      get '/users/me', params: { code: user.inheritance_code }
-
-      expect(response).to have_http_status(:forbidden)
+      expect(json["id"]).to eq(user.id)
+      expect(json["name"]).to eq("me")
+      expect(json["inheritance_code"]).to eq(user.inheritance_code)
+      expect(json["role"]).to eq("guest")
     end
   end
 end

backend/spec/requests/wiki_assets_spec.rb

@@ -1,191 +0,0 @@
-require 'digest'
-require 'rails_helper'
-require 'stringio'
-
-
-RSpec.describe 'WikiAssets API', type: :request do
-  def dummy_upload(content = 'dummy-image', filename: 'dummy.png', content_type: 'image/png')
-    Rack::Test::UploadedFile.new(StringIO.new(content),
-                                 content_type,
-                                 original_filename: filename)
-  end
-
-  let(:member) { create(:user, :member, name: 'member user') }
-  let(:guest)  { create(:user, name: 'guest user') }
-
-  let!(:tag_name) { TagName.create!(name: 'spec_wiki_asset_page') }
-  let!(:page) do
-    WikiPage.create!(tag_name: tag_name, created_user: member, updated_user: member).tap do |p|
-      Wiki::Commit.content!(page: p, body: 'init', created_user: member, message: 'init')
-    end
-  end
-
-  describe 'GET /wiki/:wiki_page_id/assets' do
-    subject(:do_request) do
-      get "/wiki/#{wiki_page_id}/assets"
-    end
-
-    let(:wiki_page_id) { page.id }
-
-    let!(:asset) do
-      WikiAsset.new(wiki_page: page,
-                    no: 1,
-                    alt_text: 'spec alt',
-                    sha256: Digest::SHA256.digest('asset-1'),
-                    created_by_user: member).tap do |record|
-        record.file.attach(dummy_upload('asset-1'))
-        record.save!
-      end
-    end
-
-    context 'when wiki page exists' do
-      it 'returns assets for the page' do
-        do_request
-
-        expect(response).to have_http_status(:ok)
-        expect(json).to be_an(Array)
-        expect(json.size).to eq(1)
-
-        expect(json.first).to include(
-            'wiki_page_id' => page.id,
-            'no' => 1)
-      end
-
-      it 'does not include assets from other pages' do
-        other_tag_name = TagName.create!(name: 'spec_other_wiki_asset_page')
-        other_page = WikiPage.create!(tag_name: other_tag_name,
-                                      created_user: member,
-                                      updated_user: member)
-        Wiki::Commit.content!(page: other_page, body: 'other', created_user: member, message: 'other')
-
-        WikiAsset.new(wiki_page: other_page,
-                      no: 1,
-                      alt_text: 'other alt',
-                      sha256: Digest::SHA256.digest('asset-2'),
-                      created_by_user: member).tap do |record|
-          record.file.attach(dummy_upload('asset-2', filename: 'other.png'))
-          record.save!
-        end
-
-        do_request
-
-        expect(response).to have_http_status(:ok)
-        expect(json.size).to eq(1)
-        expect(json.first['wiki_page_id']).to eq(page.id)
-      end
-    end
-
-    context 'when wiki page does not exist' do
-      let(:wiki_page_id) { 999_999_999 }
-
-      it 'returns 404' do
-        do_request
-        expect(response).to have_http_status(:not_found)
-      end
-    end
-  end
-
-  describe 'POST /wiki/:wiki_page_id/assets' do
-    subject(:do_request) do
-      post "/wiki/#{wiki_page_id}/assets", params: params
-    end
-
-    let(:wiki_page_id) { page.id }
-    let(:params) do
-      { file: dummy_upload(upload_content),
-        alt_text: 'uploaded alt' }
-    end
-    let(:upload_content) { 'uploaded-image-binary' }
-
-    context 'when not logged in' do
-      it 'returns 401' do
-        sign_out
-        do_request
-        expect(response).to have_http_status(:unauthorized)
-      end
-    end
-
-    context 'when logged in but not member' do
-      it 'returns 403' do
-        sign_in_as(guest)
-        do_request
-        expect(response).to have_http_status(:forbidden)
-      end
-    end
-
-    context 'when wiki page does not exist' do
-      let(:wiki_page_id) { 999_999_999 }
-
-      it 'returns 404' do
-        sign_in_as(member)
-        do_request
-        expect(response).to have_http_status(:not_found)
-      end
-    end
-
-    context 'when file is blank' do
-      let(:params) { { alt_text: 'uploaded alt' } }
-
-      it 'returns 400' do
-        sign_in_as(member)
-        do_request
-        expect(response).to have_http_status(:bad_request)
-      end
-    end
-
-    context 'when success' do
-      before do
-        sign_in_as(member)
-      end
-
-      it 'creates asset, attaches file, increments next_asset_no, and returns json' do
-        expect { do_request }
-          .to change(WikiAsset, :count).by(1)
-
-        expect(response).to have_http_status(:ok)
-
-        asset = WikiAsset.order(:id).last
-        expect(asset.wiki_page_id).to eq(page.id)
-        expect(asset.no).to eq(1)
-        expect(asset.alt_text).to eq('uploaded alt')
-        expect(asset.sha256).to eq(Digest::SHA256.digest(upload_content))
-        expect(asset.created_by_user_id).to eq(member.id)
-        expect(asset.file).to be_attached
-        expect(asset.file.download).to eq(upload_content)
-
-        expect(page.reload.next_asset_no).to eq(2)
-
-        expect(json).to include(
-          'wiki_page_id' => page.id,
-          'no' => 1,
-          'url' => asset.url
-        )
-      end
-
-      it 'uses the next page-local number when assets already exist' do
-        existing = WikiAsset.new(wiki_page: page,
-                                 no: 1,
-                                 alt_text: 'existing alt',
-                                 sha256: Digest::SHA256.digest('existing'),
-                                 created_by_user: member)
-        existing.file.attach(dummy_upload('existing', filename: 'existing.png'))
-        existing.save!
-        page.update!(next_asset_no: 2)
-
-        do_request
-
-        expect(response).to have_http_status(:ok)
-
-        asset = WikiAsset.order(:id).last
-        expect(asset.no).to eq(2)
-        expect(page.reload.next_asset_no).to eq(3)
-
-        expect(json).to include(
-          'wiki_page_id' => page.id,
-          'no' => 2,
-          'url' => asset.url
-        )
-      end
-    end
-  end
-end

backend/spec/requests/wiki_body_search_pending_spec.rb

@@ -1,27 +0,0 @@
-require 'rails_helper'
-
-RSpec.describe 'Wiki body search', type: :request do
-  let!(:user) { create_member_user! }
-
-  it 'searches wiki pages by body text' do
-    pending '#336 で対応予定'
-
-    Wiki::Commit.create_content!(
-        tag_name: TagName.create!(name: 'wiki_body_search_hit'),
-        body: 'unique body keyword for wiki search',
-        created_by_user: user,
-        message: 'init')
-
-    Wiki::Commit.create_content!(
-        tag_name: TagName.create!(name: 'wiki_body_search_miss'),
-        body: 'ordinary body',
-        created_by_user: user,
-        message: 'init')
-
-    get '/wiki/search', params: { body: 'unique body keyword' }
-
-    expect(response).to have_http_status(:ok)
-    expect(json.map { |page| page['title'] }).to include('wiki_body_search_hit')
-    expect(json.map { |page| page['title'] }).not_to include('wiki_body_search_miss')
-  end
-end

backend/spec/requests/wiki_conflict_spec.rb

@@ -1,42 +0,0 @@
-require 'rails_helper'
-
-RSpec.describe 'Wiki conflict handling', type: :request do
-  let!(:user) { create_member_user! }
-
-  def auth_headers user
-    { 'X-Transfer-Code' => user.inheritance_code }
-  end
-
-  it 'returns 409 when base_revision_id is stale' do
-    page =
-        Wiki::Commit.create_content!(
-            tag_name: TagName.create!(name: 'wiki_conflict_request'),
-            body: 'first',
-            created_by_user: user,
-            message: 'init')
-
-    stale_id = page.current_revision.id
-
-    Wiki::Commit.content!(
-        page:,
-        body: 'second',
-        created_user: user,
-        message: 'other edit',
-        base_revision_id: stale_id)
-
-    put "/wiki/#{ page.id }",
-        params: {
-          title: 'wiki_conflict_request',
-          body: 'third',
-          message: 'stale',
-          base_revision_id: stale_id,
-        },
-        headers: auth_headers(user)
-
-    expect(response).to have_http_status(:conflict)
-
-    page.reload
-    expect(page.body).to eq('second')
-    expect(page.current_revision.message).to eq('other edit')
-  end
-end

backend/spec/requests/wiki_history_integrity_spec.rb

@@ -1,196 +0,0 @@
-require 'cgi'
-require 'rails_helper'
-
-RSpec.describe 'Wiki history integrity', type: :request do
-  let!(:user) { create_member_user! }
-
-  def auth_headers user
-    { 'X-Transfer-Code' => user.inheritance_code }
-  end
-
-  def create_wiki_page title:, body: 'body', message: 'init', user: self.user
-    Wiki::Commit.create_content!(
-        tag_name: TagName.create!(name: title),
-        body:,
-        created_by_user: user,
-        message:)
-  end
-
-  describe 'POST /wiki' do
-    it 'creates wiki_page, wiki_revision, and wiki_version atomically' do
-      expect {
-        post '/wiki',
-             params: {
-               title: 'wiki_history_create_atomic',
-               body: "a\nb\nc",
-               message: 'initial commit',
-             },
-             headers: auth_headers(user)
-      }
-          .to change(WikiPage, :count).by(1)
-          .and change(WikiRevision, :count).by(1)
-          .and change(WikiVersion, :count).by(1)
-
-      expect(response).to have_http_status(:created)
-
-      page = WikiPage.find(json.fetch('id'))
-      revision = page.current_revision
-      version = page.wiki_versions.order(:version_no).last
-
-      expect(page.title).to eq('wiki_history_create_atomic')
-      expect(page.body).to eq("a\nb\nc")
-
-      expect(revision).to be_content
-      expect(revision.message).to eq('initial commit')
-      expect(revision.lines_count).to eq(3)
-
-      expect(version).to have_attributes(
-        version_no: 1,
-        event_type: 'create',
-        title: 'wiki_history_create_atomic',
-        body: "a\nb\nc",
-        reason: 'initial commit',
-        created_by_user_id: user.id
-      )
-    end
-
-    it 'returns 422 and creates nothing when normalised body is blank' do
-      expect {
-        post '/wiki',
-             params: {
-               title: 'wiki_history_blank_body',
-               body: "\r\n\r\n",
-               message: 'blank',
-             },
-             headers: auth_headers(user)
-      }
-          .not_to change(WikiPage, :count)
-
-      expect(response).to have_http_status(:unprocessable_entity)
-      expect(WikiPage.joins(:tag_name).where(tag_names: { name: 'wiki_history_blank_body' })).not_to exist
-    end
-
-    it 'returns 422 and creates no partial page when title already exists' do
-      create_wiki_page(title: 'wiki_history_duplicate_title', body: 'first')
-
-      expect {
-        post '/wiki',
-             params: {
-               title: 'wiki_history_duplicate_title',
-               body: 'second',
-               message: 'duplicate',
-             },
-             headers: auth_headers(user)
-      }
-          .not_to change(WikiPage, :count)
-
-      expect(response).to have_http_status(:unprocessable_entity)
-      expect(WikiPage.joins(:tag_name).where(tag_names: { name: 'wiki_history_duplicate_title' }).count).to eq(1)
-    end
-  end
-
-  describe 'PUT /wiki/:id' do
-    it 'updates body and records wiki_revision and wiki_version' do
-      page = create_wiki_page(title: 'wiki_history_update_body', body: 'before')
-      current_id = page.current_revision.id
-
-      expect {
-        put "/wiki/#{ page.id }",
-            params: {
-              title: 'wiki_history_update_body',
-              body: 'after',
-              message: 'edit body',
-              base_revision_id: current_id,
-            },
-            headers: auth_headers(user)
-      }
-          .to change(WikiRevision, :count).by(1)
-          .and change(WikiVersion, :count).by(1)
-
-      expect(response).to have_http_status(:ok)
-
-      page.reload
-      version = page.wiki_versions.order(:version_no).last
-
-      expect(page.title).to eq('wiki_history_update_body')
-      expect(page.body).to eq('after')
-
-      expect(version).to have_attributes(
-        event_type: 'update',
-        title: 'wiki_history_update_body',
-        body: 'after',
-        reason: 'edit body',
-        created_by_user_id: user.id
-      )
-    end
-
-    it 'renames title and records wiki_version with new title' do
-      page = create_wiki_page(title: 'wiki_history_rename_before', body: 'before')
-      current_id = page.current_revision.id
-
-      expect {
-        put "/wiki/#{ page.id }",
-            params: {
-              title: 'wiki_history_rename_after',
-              body: 'after',
-              message: 'rename',
-              base_revision_id: current_id,
-            },
-            headers: auth_headers(user)
-      }
-          .to change(WikiRevision, :count).by(1)
-          .and change(WikiVersion, :count).by(1)
-
-      expect(response).to have_http_status(:ok)
-
-      page.reload
-      version = page.wiki_versions.order(:version_no).last
-
-      expect(page.title).to eq('wiki_history_rename_after')
-      expect(page.body).to eq('after')
-
-      expect(version).to have_attributes(
-        event_type: 'update',
-        title: 'wiki_history_rename_after',
-        body: 'after',
-        reason: 'rename',
-        created_by_user_id: user.id
-      )
-    end
-
-    it 'does not change title, body, revision, or version on stale base_revision_id' do
-      page = create_wiki_page(title: 'wiki_history_conflict_page', body: 'first')
-      stale_id = page.current_revision.id
-
-      Wiki::Commit.content!(
-          page:,
-          body: 'second',
-          created_user: user,
-          message: 'other edit',
-          base_revision_id: stale_id)
-
-      page.reload
-      current_title = page.title
-      current_body = page.body
-      revision_count = page.wiki_revisions.count
-      version_count = page.wiki_versions.count
-
-      put "/wiki/#{ page.id }",
-          params: {
-            title: 'wiki_history_conflict_renamed',
-            body: 'third',
-            message: 'stale edit',
-            base_revision_id: stale_id,
-          },
-          headers: auth_headers(user)
-
-      expect(response).to have_http_status(:conflict)
-
-      page.reload
-      expect(page.title).to eq(current_title)
-      expect(page.body).to eq(current_body)
-      expect(page.wiki_revisions.count).to eq(revision_count)
-      expect(page.wiki_versions.count).to eq(version_count)
-    end
-  end
-end

backend/spec/requests/wiki_restore_pending_spec.rb

@@ -1,37 +0,0 @@
-require 'rails_helper'
-
-RSpec.describe 'Wiki restore', type: :request do
-  let!(:user) { create_member_user! }
-
-  def auth_headers user
-    { 'X-Transfer-Code' => user.inheritance_code }
-  end
-
-  it 'restores wiki page to previous version' do
-    pending '#337 で対応予定'
-
-    page =
-        Wiki::Commit.create_content!(
-            tag_name: TagName.create!(name: 'wiki_restore_page'),
-            body: 'v1',
-            created_by_user: user,
-            message: 'init')
-
-    v1 = page.wiki_versions.order(:version_no).last
-
-    Wiki::Commit.content!(
-        page:,
-        body: 'v2',
-        created_user: user,
-        message: 'edit',
-        base_revision_id: page.current_revision.id)
-
-    post "/wiki/#{ page.id }/restore",
-         params: { version_no: v1.version_no },
-         headers: auth_headers(user)
-
-    expect(response).to have_http_status(:ok)
-    expect(page.reload.body).to eq('v1')
-    expect(page.wiki_versions.order(:version_no).last.event_type).to eq('restore')
-  end
-end

backend/spec/requests/wiki_spec.rb

@@ -4,19 +4,13 @@ require 'securerandom'
 
 
 RSpec.describe 'Wiki API', type: :request do
-  def auth_headers(user)
-    { 'X-Transfer-Code' => user.inheritance_code }
-  end
-
   let!(:user) { create_member_user! }
 
   let!(:tn) { TagName.create!(name: 'spec_wiki_title') }
   let!(:page) do
-    Wiki::Commit.create_content!(
-        tag_name: tn,
-        body: 'init',
-        created_by_user: user,
-        message: 'init')
+    WikiPage.create!(tag_name: tn, created_user: user, updated_user: user).tap do |p|
+      Wiki::Commit.content!(page: p, body: 'init', created_user: user, message: 'init')
+    end
   end
 
   describe 'GET /wiki' do
@@ -43,12 +37,11 @@ RSpec.describe 'Wiki API', type: :request do
     context 'when wiki page exists' do
       it 'returns wiki page with title' do
         request
-
         expect(response).to have_http_status(:ok)
 
         expect(json).to include(
-            'id' => page.id,
-            'title' => 'spec_wiki_title')
+            'id'        => page.id,
+            'title'     => 'spec_wiki_title')
       end
     end
 
@@ -57,7 +50,6 @@ RSpec.describe 'Wiki API', type: :request do
 
       it 'returns 404' do
         request
-
         expect(response).to have_http_status(:not_found)
       end
     end
@@ -107,35 +99,25 @@ RSpec.describe 'Wiki API', type: :request do
         end
             .to change(WikiPage, :count).by(1)
             .and change(WikiRevision, :count).by(1)
-            .and change(WikiVersion, :count).by(1)
 
         expect(response).to have_http_status(:created)
 
         page_id = json.fetch('id')
         expect(json.fetch('title')).to eq('TestPage')
-        expect(json.fetch('body')).to eq("a\nb\nc")
 
-        created_page = WikiPage.find(page_id)
-        version = created_page.wiki_versions.order(:version_no).last
-
-        expect(version).to have_attributes(
-          version_no: 1,
-          event_type: 'create',
-          title: 'TestPage',
-          body: "a\nb\nc",
-          created_by_user_id: member.id
-        )
-
-        rev = created_page.current_revision
+        page = WikiPage.find(page_id)
+        rev = page.current_revision
         expect(rev).to be_present
         expect(rev).to be_content
         expect(rev.message).to eq('init')
 
-        expect(created_page.body).to eq("a\nb\nc")
+        # body が復元できること
+        expect(page.body).to eq("a\nb\nc")
 
+        # 行数とリレーションの整合
         expect(rev.lines_count).to eq(3)
         expect(rev.wiki_revision_lines.order(:position).pluck(:position)).to eq([0, 1, 2])
-        expect(rev.wiki_lines.pluck(:body)).to match_array(['a', 'b', 'c'])
+        expect(rev.wiki_lines.pluck(:body)).to match_array(%w[a b c])
       end
 
       it 'reuses existing WikiLine rows by sha256' do
@@ -153,41 +135,6 @@ RSpec.describe 'Wiki API', type: :request do
         # "a" の WikiLine が増殖しない（1行のはず）
         expect(WikiLine.where(body: 'a').count).to eq(1)
       end
-
-      it 'deduplicates duplicated new lines before upsert' do
-        duplicated = 'duplicated_line_for_wiki_line_upsert_spec'
-
-        post endpoint,
-             params: { title: 'DuplicateNewLine', body: "#{ duplicated }\n#{ duplicated }" },
-             headers: auth_headers(member)
-
-        expect(response).to have_http_status(:created)
-
-        page = WikiPage.find(json.fetch('id'))
-        rev = page.current_revision
-
-        expect(rev.lines_count).to eq(2)
-        expect(WikiLine.where(body: duplicated).count).to eq(1)
-        expect(rev.wiki_revision_lines.count).to eq(2)
-        expect(rev.wiki_revision_lines.pluck(:wiki_line_id).uniq.size).to eq(1)
-      end
-
-      it 'normalises CRLF and strips trailing newlines' do
-        post endpoint,
-             params: { title: 'NormalisedBody', body: "a\r\nb\r\n\r\n", message: 'normalise' },
-             headers: auth_headers(member)
-
-        expect(response).to have_http_status(:created)
-
-        page = WikiPage.find(json.fetch('id'))
-        rev = page.current_revision
-        version = page.wiki_versions.order(:version_no).last
-
-        expect(page.body).to eq("a\nb")
-        expect(version.body).to eq("a\nb")
-        expect(rev.lines_count).to eq(2)
-        expect(rev.wiki_lines.order('wiki_revision_lines.position').map(&:body)).to eq(['a', 'b'])
-      end
     end
   end
 
@@ -199,14 +146,17 @@ RSpec.describe 'Wiki API', type: :request do
       { 'X-Transfer-Code' => user.inheritance_code }
     end
 
-    let!(:test_tag_name) { TagName.create!(name: 'TestPage') }
-
+    #let!(:page) { create(:wiki_page, title: 'TestPage') }
     let!(:page) do
-      Wiki::Commit.create_content!(
-          tag_name: test_tag_name,
-          body: "a\nb",
-          created_by_user: member,
-          message: 'init')
+      build(:wiki_page, title: 'TestPage').tap do |p|
+        puts p.errors.full_messages unless p.valid?
+        p.save!
+      end
+    end
+
+    before do
+      # 初期版を 1 つ作っておく（更新が“2版目”になるように）
+      Wiki::Commit.content!(page: page, body: "a\nb", created_user: member, message: 'init')
     end
 
     context 'when not logged in' do
@@ -232,6 +182,14 @@ RSpec.describe 'Wiki API', type: :request do
             headers: auth_headers(member)
         expect(response).to have_http_status(:unprocessable_entity)
       end
+
+      it 'returns 422 when title mismatched (if you forbid rename here)' do
+        put "/wiki/#{page.id}",
+            params: { title: 'OtherTitle', body: 'x' },
+            headers: auth_headers(member)
+        # 君の controller 例だと title 変更は 422 にしてた
+        expect(response).to have_http_status(:unprocessable_entity)
+      end
     end
 
     context 'when success' do
@@ -242,18 +200,7 @@ RSpec.describe 'Wiki API', type: :request do
           put "/wiki/#{page.id}",
               params: { title: 'TestPage', body: "x\ny", message: 'edit', base_revision_id: current_id },
               headers: auth_headers(member)
-        end
-            .to change(WikiRevision, :count).by(1)
-            .and change(WikiVersion, :count).by(1)
-
-        version = page.wiki_versions.order(:version_no).last
-
-        expect(version).to have_attributes(
-          event_type: 'update',
-          title: 'TestPage',
-          body: "x\ny",
-          created_by_user_id: member.id
-        )
+        end.to change(WikiRevision, :count).by(1)
 
         expect(response).to have_http_status(:ok)
 
@@ -264,60 +211,25 @@ RSpec.describe 'Wiki API', type: :request do
         expect(page.body).to eq("x\ny")
         expect(rev.base_revision_id).to eq(current_id)
       end
-
-      it 'wiki body だけを変更しても tag version は作成しない' do
-        linked_tag_name = TagName.create!(name: 'wiki_body_only_tag')
-        linked_tag = Tag.create!(tag_name: linked_tag_name, category: :general)
-
-        TagVersionRecorder.record!(
-            tag: linked_tag,
-            event_type: :create,
-            created_by_user: member)
-
-        linked_page =
-            Wiki::Commit.create_content!(
-                tag_name: linked_tag_name,
-                body: 'before',
-                created_by_user: member,
-                message: 'init')
-
-        current_id = linked_page.current_revision.id
-        before_count = linked_tag.reload.tag_versions.count
-
-        expect {
-          put "/wiki/#{ linked_page.id }",
-              params: {
-                title: 'wiki_body_only_tag',
-                body: 'after',
-                message: 'edit',
-                base_revision_id: current_id,
-              },
-              headers: auth_headers(member)
-        }
-            .to change(WikiRevision, :count).by(1)
-            .and change(WikiVersion, :count).by(1)
-
-        expect(response).to have_http_status(:ok)
-        expect(linked_tag.reload.tag_versions.count).to eq(before_count)
-      end
     end
 
-    context 'when conflict' do
-      it 'returns 409 when base_revision_id mismatches' do
-        # 先に別ユーザ（同じ member でもOK）が 1 回更新して先頭を進める
-        Wiki::Commit.content!(page: page, body: "zzz", created_user: member, message: 'other edit')
-        page.reload
+    # TODO: コンフリクト未実装のため，実装したらコメント外す．
+    # context 'when conflict' do
+    #   it 'returns 409 when base_revision_id mismatches' do
+    #     # 先に別ユーザ（同じ member でもOK）が 1 回更新して先頭を進める
+    #     Wiki::Commit.content!(page: page, body: "zzz", created_user: member, message: 'other edit')
+    #     page.reload
 
-        stale_id = page.wiki_revisions.order(:id).first.id # わざと古い id
-        put "/wiki/#{page.id}",
-            params: { title: 'TestPage', body: 'x', base_revision_id: stale_id },
-            headers: auth_headers(member)
+    #     stale_id = page.wiki_revisions.order(:id).first.id # わざと古い id
+    #     put "/wiki/#{page.id}",
+    #         params: { title: 'TestPage', body: 'x', base_revision_id: stale_id },
+    #         headers: auth_headers(member)
 
-        expect(response).to have_http_status(:conflict)
-        json = JSON.parse(response.body)
-        expect(json['error']).to eq('conflict')
-      end
-    end
+    #     expect(response).to have_http_status(:conflict)
+    #     json = JSON.parse(response.body)
+    #     expect(json['error']).to eq('conflict')
+    #   end
+    # end
 
     context 'when page not found' do
       it 'returns 404' do
@@ -349,17 +261,14 @@ RSpec.describe 'Wiki API', type: :request do
 
   describe 'GET /wiki/search' do
     before do
-      Wiki::Commit.create_content!(
-          tag_name: TagName.create!(name: 'spec_wiki_title_2'),
-          body: 'search body 2',
-          created_by_user: user,
-          message: 'init')
+      # 追加で検索ヒット用
+      TagName.create!(name: 'spec_wiki_title_2')
+      WikiPage.create!(tag_name: TagName.find_by!(name: 'spec_wiki_title_2'),
+                       created_user: user, updated_user: user)
 
-      Wiki::Commit.create_content!(
-          tag_name: TagName.create!(name: 'unrelated_title'),
-          body: 'unrelated body',
-          created_by_user: user,
-          message: 'init')
+      TagName.create!(name: 'unrelated_title')
+      WikiPage.create!(tag_name: TagName.find_by!(name: 'unrelated_title'),
+                       created_user: user, updated_user: user)
     end
 
     it 'returns up to 20 pages filtered by title like' do
@@ -369,9 +278,7 @@ RSpec.describe 'Wiki API', type: :request do
       expect(json).to be_an(Array)
 
       titles = json.map { |p| p['title'] }
-
-      expect(titles).to include('spec_wiki_title')
-      expect(titles).to include('spec_wiki_title_2')
+      expect(titles).to include('spec_wiki_title', 'spec_wiki_title_2')
       expect(titles).not_to include('unrelated_title')
     end
 
@@ -422,12 +329,7 @@ RSpec.describe 'Wiki API', type: :request do
     it 'returns empty array when page has no revisions and filtered by id' do
       # 別ページを作って revision 無し
       tn2 = TagName.create!(name: 'spec_no_rev')
-      # 異常データ: revision 無し WikiPage を直接作る
-      p2 = WikiPage.create!(
-          tag_name: tn2,
-          body: 'init',
-          created_user: user,
-          updated_user: user)
+      p2 = WikiPage.create!(tag_name: tn2, created_user: user, updated_user: user)
 
       get "/wiki/changes?id=#{p2.id}"
       expect(response).to have_http_status(:ok)
@@ -496,68 +398,29 @@ RSpec.describe 'Wiki API', type: :request do
       expect(json['older_revision_id']).to eq(rev_a.id)
       expect(json['newer_revision_id']).to eq(page.current_revision.id)
     end
-  end
 
-  describe 'Wiki::Commit.redirect!' do
-    it 'raises because redirect revisions are deprecated' do
-      target_tag_name = TagName.create!(name: 'redirect_deprecated_target')
-      target =
-          Wiki::Commit.create_content!(
-              tag_name: target_tag_name,
-              body: 'target',
-              created_by_user: user,
-              message: 'init')
+    it 'returns 422 when "to" is redirect revision' do
+      # redirect revision を作る
+      tn2 = TagName.create!(name: 'redirect_target')
+      target = WikiPage.create!(tag_name: tn2, created_user: user, updated_user: user)
 
-      expect {
-        Wiki::Commit.redirect!(
-          page: page,
-          redirect_page: target,
-          created_user: user,
-          message: 'redirect',
-          base_revision_id: page.current_revision.id
-        )
-      }.to raise_error(RuntimeError, '廃止しました．')
+      Wiki::Commit.redirect!(page: page, redirect_page: target, created_user: user, message: 'redir')
+      redirect_rev = page.current_revision
+      expect(redirect_rev).to be_redirect
+
+      get "/wiki/#{page.id}/diff?from=#{rev_a.id}&to=#{redirect_rev.id}"
+      expect(response).to have_http_status(:unprocessable_entity)
+    end
+
+    it 'returns 422 when "from" is redirect revision' do
+      tn2 = TagName.create!(name: 'redirect_target2')
+      target = WikiPage.create!(tag_name: tn2, created_user: user, updated_user: user)
+
+      Wiki::Commit.redirect!(page: page, redirect_page: target, created_user: user, message: 'redir2')
+      redirect_rev = page.current_revision
+
+      get "/wiki/#{page.id}/diff?from=#{redirect_rev.id}&to=#{rev_b.id}"
+      expect(response).to have_http_status(:unprocessable_entity)
     end
   end
-
-  it 'wiki title を変更すると対応する tag の version を作成する' do
-    linked_tag_name = TagName.create!(name: 'wiki_linked_tag_for_version')
-    linked_tag = Tag.create!(tag_name: linked_tag_name, category: :general)
-
-    linked_page =
-        Wiki::Commit.create_content!(
-            tag_name: linked_tag_name,
-            body: 'before',
-            created_by_user: user,
-            message: 'init')
-
-    current_id = linked_page.current_revision.id
-
-    expect {
-      put "/wiki/#{ linked_page.id }",
-          params: {
-            title: 'wiki_linked_tag_for_version_renamed',
-            body: 'after',
-            message: 'rename',
-            base_revision_id: current_id,
-          },
-          headers: auth_headers(user)
-    }
-        .to change(WikiRevision, :count).by(1)
-        .and change(WikiVersion, :count).by(1)
-        .and change { linked_tag.reload.tag_versions.count }.by(2)
-
-    expect(response).to have_http_status(:ok)
-
-    linked_tag.reload
-    expect(linked_tag.name).to eq('wiki_linked_tag_for_version_renamed')
-
-    versions = linked_tag.tag_versions.order(:version_no)
-
-    expect(versions.first.event_type).to eq('create')
-    expect(versions.first.name).to eq('wiki_linked_tag_for_version')
-
-    expect(versions.second.event_type).to eq('update')
-    expect(versions.second.name).to eq('wiki_linked_tag_for_version_renamed')
-  end
 end

backend/spec/requests/wiki_title_collision_spec.rb

@@ -1,62 +0,0 @@
-require 'rails_helper'
-
-RSpec.describe 'Wiki title collision', type: :request do
-  let!(:user) { create_member_user! }
-
-  def auth_headers user
-    { 'X-Transfer-Code' => user.inheritance_code }
-  end
-
-  def create_wiki_page title:, body:
-    Wiki::Commit.create_content!(
-        tag_name: TagName.create!(name: title),
-        body:,
-        created_by_user: user,
-        message: 'init')
-  end
-
-  it 'returns 422 when renaming wiki title to existing title' do
-    source = create_wiki_page(title: 'wiki_collision_source', body: 'source body')
-    create_wiki_page(title: 'wiki_collision_target', body: 'target body')
-
-    source_revision_count = source.wiki_revisions.count
-    source_version_count = source.wiki_versions.count
-    old_title = source.title
-    old_body = source.body
-
-    put "/wiki/#{ source.id }",
-        params: {
-          title: 'wiki_collision_target',
-          body: 'new body',
-          message: 'rename collision',
-          base_revision_id: source.current_revision.id,
-        },
-        headers: auth_headers(user)
-
-    expect(response).to have_http_status(:unprocessable_entity)
-
-    source.reload
-
-    expect(source.title).to eq(old_title)
-    expect(source.body).to eq(old_body)
-    expect(source.wiki_revisions.count).to eq(source_revision_count)
-    expect(source.wiki_versions.count).to eq(source_version_count)
-  end
-
-  it 'returns 422 when creating wiki with existing title' do
-    create_wiki_page(title: 'wiki_collision_create', body: 'already exists')
-
-    expect {
-      post '/wiki',
-           params: {
-             title: 'wiki_collision_create',
-             body: 'new body',
-             message: 'duplicate create',
-           },
-           headers: auth_headers(user)
-    }
-        .not_to change(WikiPage, :count)
-
-    expect(response).to have_http_status(:unprocessable_entity)
-  end
-end

backend/spec/services/wiki/commit_integrity_spec.rb

@@ -1,173 +0,0 @@
-require 'digest'
-require 'rails_helper'
-
-RSpec.describe Wiki::Commit do
-  let(:user) { create_member_user! }
-
-  def create_page title:, body: 'initial body'
-    described_class.create_content!(
-        tag_name: TagName.create!(name: title),
-        body:,
-        created_by_user: user,
-        message: 'init')
-  end
-
-  describe '.create_content!' do
-    it 'creates page, revision, and version with normalised body' do
-      expect {
-        described_class.create_content!(
-            tag_name: TagName.create!(name: 'commit_integrity_create'),
-            body: "a\r\nb\r\n\r\n",
-            created_by_user: user,
-            message: 'init')
-      }
-          .to change(WikiPage, :count).by(1)
-          .and change(WikiRevision, :count).by(1)
-          .and change(WikiVersion, :count).by(1)
-
-      page = WikiPage.joins(:tag_name).find_by!(tag_names: { name: 'commit_integrity_create' })
-      revision = page.current_revision
-      version = page.wiki_versions.order(:version_no).last
-
-      expect(page.body).to eq("a\nb")
-      expect(revision.lines_count).to eq(2)
-      expect(version.body).to eq("a\nb")
-      expect(version.reason).to eq('init')
-    end
-
-    it 'rejects body that becomes blank after normalisation' do
-      tag_name = TagName.create!(name: 'commit_integrity_blank')
-
-      expect {
-        described_class.create_content!(
-            tag_name:,
-            body: "\r\n\r\n",
-            created_by_user: user,
-            message: 'blank')
-      }
-          .to raise_error(ActiveRecord::RecordInvalid)
-
-      expect(WikiPage.where(tag_name:)).not_to exist
-    end
-  end
-
-  describe '.content!' do
-    it 'updates page body, revision, and version' do
-      page = create_page(title: 'commit_integrity_update', body: 'before')
-      current_id = page.current_revision.id
-
-      expect {
-        described_class.content!(
-            page:,
-            body: 'after',
-            created_user: user,
-            message: 'edit',
-            base_revision_id: current_id)
-      }
-          .to change(WikiRevision, :count).by(1)
-          .and change(WikiVersion, :count).by(1)
-
-      page.reload
-      version = page.wiki_versions.order(:version_no).last
-
-      expect(page.body).to eq('after')
-      expect(version.body).to eq('after')
-      expect(version.reason).to eq('edit')
-    end
-
-    it 'does not record tag_version on body-only wiki update' do
-      tag_name = TagName.create!(name: 'commit_integrity_linked_tag')
-      tag = Tag.create!(tag_name:, category: :general)
-
-      page =
-          described_class.create_content!(
-              tag_name:,
-              body: 'before',
-              created_by_user: user,
-              message: 'init')
-
-      TagVersionRecorder.record!(
-          tag:,
-          event_type: :create,
-          created_by_user: user)
-
-      before_count = tag.reload.tag_versions.count
-
-      described_class.content!(
-          page:,
-          body: 'after',
-          created_user: user,
-          message: 'edit',
-          base_revision_id: page.current_revision.id)
-
-      expect(tag.reload.tag_versions.count).to eq(before_count)
-    end
-
-    it 'raises conflict and leaves page, revision, and version unchanged' do
-      page = create_page(title: 'commit_integrity_conflict', body: 'first')
-      stale_id = page.current_revision.id
-
-      described_class.content!(
-          page:,
-          body: 'second',
-          created_user: user,
-          message: 'second',
-          base_revision_id: stale_id)
-
-      page.reload
-      before_body = page.body
-      before_revision_count = page.wiki_revisions.count
-      before_version_count = page.wiki_versions.count
-
-      expect {
-        described_class.content!(
-            page:,
-            body: 'third',
-            created_user: user,
-            message: 'stale',
-            base_revision_id: stale_id)
-      }
-          .to raise_error(Wiki::Commit::Conflict)
-
-      page.reload
-      expect(page.body).to eq(before_body)
-      expect(page.wiki_revisions.count).to eq(before_revision_count)
-      expect(page.wiki_versions.count).to eq(before_version_count)
-    end
-
-    it 'deduplicates duplicated missing wiki lines' do
-      page = create_page(title: 'commit_integrity_dedup', body: 'before')
-      duplicated = 'commit_integrity_duplicate_line'
-
-      described_class.content!(
-          page:,
-          body: "#{ duplicated }\n#{ duplicated }",
-          created_user: user,
-          message: 'dedup',
-          base_revision_id: page.current_revision.id)
-
-      revision = page.reload.current_revision
-
-      expect(WikiLine.where(body: duplicated).count).to eq(1)
-      expect(revision.wiki_revision_lines.count).to eq(2)
-      expect(revision.wiki_revision_lines.pluck(:wiki_line_id).uniq.size).to eq(1)
-    end
-  end
-
-  describe '.redirect!' do
-    it 'raises because redirect revisions are deprecated' do
-      page = create_page(title: 'commit_integrity_redirect_source', body: 'source')
-      target = create_page(title: 'commit_integrity_redirect_target', body: 'target')
-
-      expect {
-        described_class.redirect!(
-            page:,
-            redirect_page: target,
-            created_user: user,
-            message: 'redirect',
-            base_revision_id: page.current_revision.id)
-      }
-          .to raise_error(RuntimeError, '廃止しました．')
-    end
-  end
-end

backend/spec/services/wiki/commit_spec.rb

@@ -1,150 +0,0 @@
-require 'rails_helper'
-
-RSpec.describe Wiki::Commit do
-  let(:user) { create_member_user! }
-
-  def create_page(title: 'commit_spec_page', body: 'initial body')
-    tag_name = TagName.create!(name: title)
-
-    Wiki::Commit.create_content!(
-        tag_name:,
-        body:,
-        created_by_user: user,
-        message: 'init')
-  end
-
-  describe '.content!' do
-    it 'stores normalised body in wiki_pages and wiki_versions' do
-      page = create_page(title: 'commit_normalised_page')
-
-      described_class.content!(
-        page:,
-        body: "a\r\nb\r\n\r\n",
-        created_user: user,
-        message: 'init'
-      )
-
-      page.reload
-      version = page.wiki_versions.order(:version_no).last
-
-      expect(page.body).to eq("a\nb")
-      expect(version.body).to eq("a\nb")
-      expect(page.current_revision.lines_count).to eq(2)
-    end
-
-    it 'deduplicates duplicated missing wiki lines before upsert' do
-      page = create_page(title: 'commit_duplicate_line_page')
-      duplicated = 'commit_duplicate_line'
-
-      described_class.content!(
-        page:,
-        body: "#{ duplicated }\n#{ duplicated }",
-        created_user: user,
-        message: 'init'
-      )
-
-      page.reload
-
-      expect(WikiLine.where(body: duplicated).count).to eq(1)
-      expect(page.current_revision.lines_count).to eq(2)
-      expect(page.current_revision.wiki_revision_lines.count).to eq(2)
-    end
-
-    it 'raises conflict when base_revision_id is stale' do
-      page = create_page(title: 'commit_conflict_page')
-
-      first = described_class.content!(
-        page:,
-        body: 'first',
-        created_user: user,
-        message: 'first'
-      )
-
-      described_class.content!(
-        page:,
-        body: 'second',
-        created_user: user,
-        message: 'second',
-        base_revision_id: first.id
-      )
-
-      expect {
-        described_class.content!(
-          page:,
-          body: 'third',
-          created_user: user,
-          message: 'third',
-          base_revision_id: first.id
-        )
-      }.to raise_error(Wiki::Commit::Conflict)
-    end
-
-    it 'does not record tag version when corresponding tag has no versions' do
-      tag_name = TagName.create!(name: 'commit_linked_tag_without_versions')
-      tag = Tag.create!(tag_name:, category: :general)
-
-      page =
-          described_class.create_content!(
-              tag_name:,
-              body: 'before',
-              created_by_user: user,
-              message: 'init')
-
-      expect(tag.reload.tag_versions.count).to eq(0)
-
-      current_revision_id = page.current_revision.id
-
-      expect {
-        described_class.content!(
-            page:,
-            body: 'after',
-            created_user: user,
-            message: 'edit',
-            base_revision_id: current_revision_id)
-      }.to change(WikiVersion, :count).by(1)
-
-      expect(tag.reload.tag_versions.count).to eq(0)
-    end
-
-    it 'does not record tag version when corresponding tag has no versions' do
-      tag_name = TagName.create!(name: 'commit_linked_tag_without_versions')
-      tag = Tag.create!(tag_name:, category: :general)
-
-      page =
-          described_class.create_content!(
-              tag_name:,
-              body: 'before',
-              created_by_user: user,
-              message: 'init')
-
-      current_revision_id = page.current_revision.id
-
-      expect {
-        described_class.content!(
-            page:,
-            body: 'after',
-            created_user: user,
-            message: 'edit',
-            base_revision_id: current_revision_id)
-      }.to change(WikiVersion, :count).by(1)
-
-      expect(tag.reload.tag_versions.count).to eq(0)
-    end
-  end
-
-  describe '.redirect!' do
-    it 'raises because redirect revisions are deprecated' do
-      page = create_page(title: 'commit_redirect_source')
-      target = create_page(title: 'commit_redirect_target')
-
-      expect {
-        described_class.redirect!(
-          page:,
-          redirect_page: target,
-          created_user: user,
-          message: 'redirect'
-        )
-      }.to raise_error(RuntimeError, '廃止しました．')
-    end
-  end
-end

backend/spec/services/wiki_version_recorder_spec.rb

@@ -1,99 +0,0 @@
-require 'rails_helper'
-
-RSpec.describe WikiVersionRecorder do
-  let(:user) { create_member_user! }
-
-  def create_page title:, body: 'body'
-    Wiki::Commit.create_content!(
-        tag_name: TagName.create!(name: title),
-        body:,
-        created_by_user: user,
-        message: 'init')
-  end
-
-  describe '.record!' do
-    it 'records title, body, reason, user, and version number' do
-      page = create_page(title: 'wiki_version_recorder_basic', body: 'body')
-
-      expect {
-        described_class.record!(
-            page:,
-            event_type: :update,
-            reason: 'manual reason',
-            created_by_user: user)
-      }
-          .to change { page.reload.wiki_versions.count }.by(1)
-
-      version = page.wiki_versions.order(:version_no).last
-
-      expect(version).to have_attributes(
-        version_no: 2,
-        event_type: 'update',
-        title: 'wiki_version_recorder_basic',
-        body: 'body',
-        reason: 'manual reason',
-        created_by_user_id: user.id
-      )
-    end
-
-    it 'does not create duplicated update version for identical snapshot' do
-      page = create_page(title: 'wiki_version_recorder_duplicate', body: 'body')
-
-      described_class.record!(
-          page:,
-          event_type: :update,
-          reason: nil,
-          created_by_user: user)
-
-      before_count = page.reload.wiki_versions.count
-
-      described_class.record!(
-          page:,
-          event_type: :update,
-          reason: nil,
-          created_by_user: user)
-
-      expect(page.reload.wiki_versions.count).to eq(before_count)
-    end
-
-    it 'creates update version when title changes' do
-      page = create_page(title: 'wiki_version_recorder_title_before', body: 'body')
-      page.tag_name.update!(name: 'wiki_version_recorder_title_after')
-
-      expect {
-        described_class.record!(
-            page:,
-            event_type: :update,
-            reason: 'rename',
-            created_by_user: user)
-      }
-          .to change { page.reload.wiki_versions.count }.by(1)
-
-      version = page.wiki_versions.order(:version_no).last
-
-      expect(version.title).to eq('wiki_version_recorder_title_after')
-      expect(version.body).to eq('body')
-      expect(version.reason).to eq('rename')
-    end
-
-    it 'creates update version when body changes' do
-      page = create_page(title: 'wiki_version_recorder_body', body: 'before')
-      page.update!(body: 'after')
-
-      expect {
-        described_class.record!(
-            page:,
-            event_type: :update,
-            reason: 'body',
-            created_by_user: user)
-      }
-          .to change { page.reload.wiki_versions.count }.by(1)
-
-      version = page.wiki_versions.order(:version_no).last
-
-      expect(version.title).to eq('wiki_version_recorder_body')
-      expect(version.body).to eq('after')
-      expect(version.reason).to eq('body')
-    end
-  end
-end

backend/spec/services/youtube/api_client_spec.rb

@@ -1,130 +0,0 @@
-require 'rails_helper'
-
-RSpec.describe Youtube::ApiClient do
-  let(:api_key) { 'test-api-key' }
-  let(:client) { described_class.new(api_key:) }
-
-  describe '#search_videos' do
-    it 'calls YouTube search API with expected params' do
-      published_after = Time.zone.parse('2026-05-01 00:00:00')
-      published_before = Time.zone.parse('2026-05-02 00:00:00')
-
-      expect(client).to receive(:get_json).with(
-        '/search',
-        {
-          part: 'snippet',
-          type: 'video',
-          q: 'ぼざろクリーチャー',
-          order: 'date',
-          maxResults: 50,
-          regionCode: 'JP',
-          relevanceLanguage: 'ja',
-          publishedAfter: published_after.iso8601,
-          publishedBefore: published_before.iso8601,
-          pageToken: 'NEXT'
-        }
-      ).and_return({ 'items' => [] })
-
-      client.search_videos(
-        q: 'ぼざろクリーチャー',
-        published_after:,
-        published_before:,
-        page_token: 'NEXT'
-      )
-    end
-
-    it 'omits nil optional params' do
-      expect(client).to receive(:get_json).with(
-        '/search',
-        hash_excluding(:publishedAfter, :publishedBefore, :pageToken)
-      ).and_return({ 'items' => [] })
-
-      client.search_videos(q: 'ぼざろクリーチャー')
-    end
-  end
-
-  describe '#videos' do
-    it 'returns empty items when ids are empty' do
-      expect(client).not_to receive(:get_json)
-
-      expect(client.videos([])).to eq({ 'items' => [] })
-    end
-
-    it 'calls videos API with comma separated ids' do
-      expect(client).to receive(:get_json).with(
-        '/videos',
-        {
-          part: 'snippet,status,contentDetails',
-          id: 'video-1,video-2'
-        }
-      ).and_return({ 'items' => [] })
-
-      client.videos(['video-1', 'video-2'])
-    end
-  end
-
-  describe '#playlist_items' do
-    it 'calls playlistItems API with page token' do
-      expect(client).to receive(:get_json).with(
-        '/playlistItems',
-        {
-          part: 'snippet,contentDetails,status',
-          playlistId: 'PL123',
-          maxResults: 50,
-          pageToken: 'NEXT'
-        }
-      ).and_return({ 'items' => [] })
-
-      client.playlist_items(playlist_id: 'PL123', page_token: 'NEXT')
-    end
-
-    it 'omits page token when nil' do
-      expect(client).to receive(:get_json).with(
-        '/playlistItems',
-        {
-          part: 'snippet,contentDetails,status',
-          playlistId: 'PL123',
-          maxResults: 50
-        }
-      ).and_return({ 'items' => [] })
-
-      client.playlist_items(playlist_id: 'PL123')
-    end
-  end
-
-  describe '#channel' do
-    it 'calls channels API by id' do
-      expect(client).to receive(:get_json).with(
-        '/channels',
-        {
-          part: 'snippet,contentDetails',
-          id: 'UC123'
-        }
-      ).and_return({ 'items' => [] })
-
-      client.channel(id: 'UC123')
-    end
-
-    it 'calls channels API by handle' do
-      expect(client).to receive(:get_json).with(
-        '/channels',
-        {
-          part: 'snippet,contentDetails',
-          forHandle: '@some_handle'
-        }
-      ).and_return({ 'items' => [] })
-
-      client.channel(handle: '@some_handle')
-    end
-
-    it 'raises when neither id nor handle is given' do
-      expect { client.channel }.to raise_error(ArgumentError, 'id or handle is required')
-    end
-
-    it 'raises when both id and handle are given' do
-      expect do
-        client.channel(id: 'UC123', handle: '@some_handle')
-      end.to raise_error(ArgumentError, 'id or handle is required')
-    end
-  end
-end

backend/spec/services/youtube/sync_spec.rb

@@ -1,310 +0,0 @@
-require 'rails_helper'
-
-RSpec.describe Youtube::Sync do
-  let(:client) { instance_double(Youtube::ApiClient) }
-  let(:sync) { described_class.new(client:) }
-
-  before do
-    allow(PostVersionRecorder).to receive(:record!)
-    allow(PostVersionRecorder).to receive(:ensure_snapshot!)
-    allow(sync).to receive(:attach_thumbnail_if_needed!)
-  end
-
-  describe '#sync!' do
-    it 'returns without fetching video details when no video ids are discovered' do
-      allow(sync).to receive(:query_terms).and_return([])
-      allow(sync).to receive(:playlist_ids).and_return([])
-
-      expect(client).not_to receive(:videos)
-
-      sync.sync!
-    end
-
-    it 'discovers ids from search and all playlist pages' do
-      allow(sync).to receive(:query_terms).and_return(['ぼざろクリーチャー'])
-      allow(sync).to receive(:playlist_ids).and_return(['PL123'])
-      allow(sync).to receive(:sync_since).and_return(Time.zone.parse('2026-05-01 00:00:00'))
-
-      allow(client).to receive(:search_videos).with(
-        q: 'ぼざろクリーチャー',
-        published_after: Time.zone.parse('2026-05-01 00:00:00')
-      ).and_return({
-        'items' => [
-          {
-            'id' => {
-              'videoId' => 'search-video-1'
-            }
-          }
-        ]
-      })
-
-      allow(client).to receive(:playlist_items).with(
-        playlist_id: 'PL123',
-        page_token: nil
-      ).and_return({
-        'items' => [
-          {
-            'contentDetails' => {
-              'videoId' => 'playlist-video-1'
-            }
-          }
-        ],
-        'nextPageToken' => 'NEXT'
-      })
-
-      allow(client).to receive(:playlist_items).with(
-        playlist_id: 'PL123',
-        page_token: 'NEXT'
-      ).and_return({
-        'items' => [
-          {
-            'snippet' => {
-              'resourceId' => {
-                'videoId' => 'playlist-video-2'
-              }
-            }
-          }
-        ]
-      })
-
-      expect(client).to receive(:videos).with(
-        satisfy do |ids|
-          ids.sort == ['playlist-video-1', 'playlist-video-2', 'search-video-1']
-        end
-      ).and_return({ 'items' => [] })
-
-      sync.sync!
-    end
-
-    it 'creates a YouTube post with default tags and no_deerjikist when no deerjikist mapping exists' do
-      Tag.tagme
-      Tag.bot
-      Tag.youtube
-      Tag.video
-      Tag.no_deerjikist
-
-      allow(sync).to receive(:query_terms).and_return([])
-      allow(sync).to receive(:playlist_ids).and_return(['PL123'])
-
-      allow(client).to receive(:playlist_items).with(
-        playlist_id: 'PL123',
-        page_token: nil
-      ).and_return({
-        'items' => [
-          {
-            'contentDetails' => {
-              'videoId' => 'video-1'
-            }
-          }
-        ]
-      })
-
-      allow(client).to receive(:videos).with(['video-1']).and_return({
-        'items' => [
-          youtube_video_item(
-            id: 'video-1',
-            title: 'YouTube テスト動画',
-            channel_id: 'UC_NO_MAPPING'
-          )
-        ]
-      })
-
-      expect do
-        sync.sync!
-      end.to change(Post, :count).by(1)
-
-      post = Post.find_by!(url: 'https://www.youtube.com/watch?v=video-1')
-      tag_ids = post.tags.pluck(:id)
-
-      expect(post.title).to eq('YouTube テスト動画')
-      expect(post.uploaded_user_id).to be_nil
-      expect(post.original_created_from).to eq(Time.zone.parse('2026-05-01 12:34:00'))
-      expect(post.original_created_before).to eq(Time.zone.parse('2026-05-01 12:35:00'))
-
-      expect(tag_ids).to include(Tag.tagme.id)
-      expect(tag_ids).to include(Tag.bot.id)
-      expect(tag_ids).to include(Tag.youtube.id)
-      expect(tag_ids).to include(Tag.video.id)
-      expect(tag_ids).to include(Tag.no_deerjikist.id)
-
-      expect(PostVersionRecorder).to have_received(:record!).with(
-        post:,
-        event_type: :create,
-        created_by_user: nil
-      )
-    end
-
-    it 'uses deerjikist tag when channel id is mapped' do
-      Tag.tagme
-      Tag.bot
-      Tag.youtube
-      Tag.video
-      Tag.no_deerjikist
-
-      deerjikist_tag = Tag.find_or_create_by_tag_name!('テスト投稿者', category: :deerjikist)
-      Deerjikist.create!(
-        platform: 'youtube',
-        code: 'UC_MAPPED',
-        tag: deerjikist_tag
-      )
-
-      allow(sync).to receive(:query_terms).and_return([])
-      allow(sync).to receive(:playlist_ids).and_return(['PL123'])
-
-      allow(client).to receive(:playlist_items).with(
-        playlist_id: 'PL123',
-        page_token: nil
-      ).and_return({
-        'items' => [
-          {
-            'contentDetails' => {
-              'videoId' => 'video-1'
-            }
-          }
-        ]
-      })
-
-      allow(client).to receive(:videos).with(['video-1']).and_return({
-        'items' => [
-          youtube_video_item(
-            id: 'video-1',
-            title: 'YouTube テスト動画',
-            channel_id: 'UC_MAPPED'
-          )
-        ]
-      })
-
-      sync.sync!
-
-      post = Post.find_by!(url: 'https://www.youtube.com/watch?v=video-1')
-      tag_ids = post.tags.pluck(:id)
-
-      expect(tag_ids).to include(deerjikist_tag.id)
-      expect(tag_ids).not_to include(Tag.no_deerjikist.id)
-    end
-
-    it 'removes no_deerjikist when deerjikist mapping is added later' do
-      Tag.no_deerjikist
-
-      post = Post.create!(
-        title: '旧タイトル',
-        url: 'https://www.youtube.com/watch?v=video-1',
-        uploaded_user_id: nil,
-        original_created_from: Time.zone.parse('2026-05-01 00:00:00'),
-        original_created_before: Time.zone.parse('2026-05-01 00:01:00')
-      )
-      PostTag.create!(post:, tag: Tag.no_deerjikist)
-
-      deerjikist_tag = Tag.find_or_create_by_tag_name!('後から判明した投稿者', category: :deerjikist)
-      Deerjikist.create!(
-        platform: 'youtube',
-        code: 'UC_MAPPED_LATER',
-        tag: deerjikist_tag
-      )
-
-      allow(sync).to receive(:query_terms).and_return([])
-      allow(sync).to receive(:playlist_ids).and_return(['PL123'])
-
-      allow(client).to receive(:playlist_items).with(
-        playlist_id: 'PL123',
-        page_token: nil
-      ).and_return({
-        'items' => [
-          {
-            'contentDetails' => {
-              'videoId' => 'video-1'
-            }
-          }
-        ]
-      })
-
-      allow(client).to receive(:videos).with(['video-1']).and_return({
-        'items' => [
-          youtube_video_item(
-            id: 'video-1',
-            title: '新タイトル',
-            channel_id: 'UC_MAPPED_LATER'
-          )
-        ]
-      })
-
-      sync.sync!
-
-      post.reload
-      tag_ids = post.tags.pluck(:id)
-
-      expect(post.title).to eq('新タイトル')
-      expect(tag_ids).to include(deerjikist_tag.id)
-      expect(tag_ids).not_to include(Tag.no_deerjikist.id)
-
-      expect(PostVersionRecorder).to have_received(:ensure_snapshot!).with(
-        post,
-        created_by_user: nil
-      )
-      expect(PostVersionRecorder).to have_received(:record!).with(
-        post:,
-        event_type: :update,
-        created_by_user: nil
-      )
-    end
-
-    it 'matches existing youtu.be URL and does not create duplicate post' do
-      post = Post.create!(
-        title: '旧タイトル',
-        url: 'https://youtu.be/video-1',
-        uploaded_user_id: nil,
-        original_created_from: Time.zone.parse('2026-05-01 00:00:00'),
-        original_created_before: Time.zone.parse('2026-05-01 00:01:00')
-      )
-
-      allow(sync).to receive(:query_terms).and_return([])
-      allow(sync).to receive(:playlist_ids).and_return(['PL123'])
-
-      allow(client).to receive(:playlist_items).with(
-        playlist_id: 'PL123',
-        page_token: nil
-      ).and_return({
-        'items' => [
-          {
-            'contentDetails' => {
-              'videoId' => 'video-1'
-            }
-          }
-        ]
-      })
-
-      allow(client).to receive(:videos).with(['video-1']).and_return({
-        'items' => [
-          youtube_video_item(
-            id: 'video-1',
-            title: '新タイトル',
-            channel_id: 'UC_NO_MAPPING'
-          )
-        ]
-      })
-
-      expect do
-        sync.sync!
-      end.not_to change(Post, :count)
-
-      expect(post.reload.title).to eq('新タイトル')
-    end
-  end
-
-  def youtube_video_item(id:, title:, channel_id:)
-    {
-      'id' => id,
-      'snippet' => {
-        'title' => title,
-        'channelId' => channel_id,
-        'publishedAt' => '2026-05-01T12:34:56Z',
-        'thumbnails' => {
-          'high' => {
-            'url' => "https://img.youtube.com/#{id}.jpg"
-          }
-        },
-        'tags' => ['tag-a', 'tag-b']
-      }
-    }
-  end
-end

backend/spec/services/youtube/video_item_spec.rb

@@ -1,93 +0,0 @@
-require 'rails_helper'
-
-RSpec.describe Youtube::VideoItem do
-  describe '#initialize' do
-    it 'extracts fields from YouTube video API item' do
-      item = {
-        'id' => 'video-1',
-        'snippet' => {
-          'title' => 'テスト動画',
-          'channelId' => 'UC123',
-          'publishedAt' => '2026-05-01T12:34:56Z',
-          'tags' => ['tag-a', 'tag-b'],
-          'thumbnails' => {
-            'high' => {
-              'url' => 'https://img.youtube.com/high.jpg'
-            },
-            'medium' => {
-              'url' => 'https://img.youtube.com/medium.jpg'
-            }
-          }
-        }
-      }
-
-      video = described_class.new(item)
-
-      expect(video.id).to eq('video-1')
-      expect(video.title).to eq('テスト動画')
-      expect(video.channel_id).to eq('UC123')
-      expect(video.published_at).to eq(Time.iso8601('2026-05-01T12:34:56Z'))
-      expect(video.thumbnail_url).to eq('https://img.youtube.com/high.jpg')
-      expect(video.raw_tags).to eq(['tag-a', 'tag-b'])
-      expect(video.url).to eq('https://www.youtube.com/watch?v=video-1')
-    end
-
-    it 'uses highest priority thumbnail' do
-      item = {
-        'id' => 'video-1',
-        'snippet' => {
-          'title' => 'テスト動画',
-          'channelId' => 'UC123',
-          'publishedAt' => '2026-05-01T12:34:56Z',
-          'thumbnails' => {
-            'default' => {
-              'url' => 'https://img.youtube.com/default.jpg'
-            },
-            'standard' => {
-              'url' => 'https://img.youtube.com/standard.jpg'
-            },
-            'maxres' => {
-              'url' => 'https://img.youtube.com/maxres.jpg'
-            }
-          }
-        }
-      }
-
-      video = described_class.new(item)
-
-      expect(video.thumbnail_url).to eq('https://img.youtube.com/maxres.jpg')
-    end
-
-    it 'falls back to empty raw tags' do
-      item = {
-        'id' => 'video-1',
-        'snippet' => {
-          'title' => 'テスト動画',
-          'channelId' => 'UC123',
-          'publishedAt' => '2026-05-01T12:34:56Z',
-          'thumbnails' => {}
-        }
-      }
-
-      video = described_class.new(item)
-
-      expect(video.raw_tags).to eq([])
-    end
-
-    it 'returns nil thumbnail when no thumbnail exists' do
-      item = {
-        'id' => 'video-1',
-        'snippet' => {
-          'title' => 'テスト動画',
-          'channelId' => 'UC123',
-          'publishedAt' => '2026-05-01T12:34:56Z',
-          'thumbnails' => {}
-        }
-      }
-
-      video = described_class.new(item)
-
-      expect(video.thumbnail_url).to be_nil
-    end
-  end
-end

backend/spec/support/test_records.rb

@@ -2,12 +2,14 @@ module TestRecords
   def create_member_user!
     User.create!(name: 'spec user',
                  inheritance_code: SecureRandom.hex(16),
-                 role: 'member')
+                 role: 'member',
+                 banned: false)
   end
 
   def create_admin_user!
     User.create!(name: 'spec admin',
                  inheritance_code: SecureRandom.hex(16),
-                 role: 'admin')
+                 role: 'admin',
+                 banned: false)
   end
 end

backend/spec/tasks/nico_export_spec.rb

@@ -1,100 +0,0 @@
-require 'rails_helper'
-require 'rake'
-require 'open3'
-
-RSpec.describe 'nico:export' do
-  let(:task) { Rake::Task['nico:export'] }
-  let(:success_status) { instance_double(Process::Status, success?: true) }
-  let(:failure_status) { instance_double(Process::Status, success?: false) }
-
-  def create_post(url)
-    Post.create!(url:)
-  end
-
-  before(:all) do
-    Rails.application.load_tasks unless Rake::Task.task_defined?('nico:export')
-  end
-
-  before do
-    task.reenable
-
-    allow(ENV).to receive(:fetch).with('MYSQL_USER').and_return('mysql-user')
-    allow(ENV).to receive(:fetch).with('MYSQL_PASS').and_return('mysql-pass')
-    allow(ENV).to receive(:fetch).with('NIZIKA_NICO_PATH').and_return('/srv/nizika-nico')
-  end
-
-  describe 'export' do
-    it 'exports nicovideo ids to shared nico DB' do
-      create_post('https://www.nicovideo.jp/watch/sm12345?ref=foo')
-      create_post('https://www.nicovideo.jp/watch/so67890#comments')
-      create_post('https://www.nicovideo.jp/watch/nm24680')
-      create_post('https://example.com/watch/sm99999')
-
-      expect(Open3).to receive(:capture3) do |env, *args, **kwargs|
-        expect(env).to eq(
-          {
-            'MYSQL_USER' => 'mysql-user',
-            'MYSQL_PASS' => 'mysql-pass',
-          },
-        )
-
-        expect(args.take(3)).to eq(
-          [
-            'python3',
-            '-m',
-            'tracked_videos.put_bulk_upsert',
-          ],
-        )
-
-        expect(args.drop(3)).to contain_exactly(
-          'sm12345',
-          'so67890',
-          'nm24680',
-        )
-
-        expect(kwargs).to eq(chdir: '/srv/nizika-nico')
-
-        ['', '', success_status]
-      end
-
-      task.invoke
-    end
-
-    it 'deduplicates video ids' do
-      create_post('https://www.nicovideo.jp/watch/sm12345')
-      create_post('https://www.nicovideo.jp/watch/sm12345?from=1')
-
-      expect(Open3).to receive(:capture3) do |_env, *args, **_kwargs|
-        expect(args.drop(3)).to eq(['sm12345'])
-
-        ['', '', success_status]
-      end
-
-      task.invoke
-    end
-
-    it 'does not call python when there are no nicovideo posts' do
-      create_post('https://example.com/watch/sm12345')
-
-      expect(Open3).not_to receive(:capture3)
-
-      task.invoke
-    end
-
-    it 'raises stderr when python command fails' do
-      create_post('https://www.nicovideo.jp/watch/sm12345')
-
-      allow(Open3).to receive(:capture3).and_return(
-        [
-          '',
-          'bulk upsert failed',
-          failure_status,
-        ],
-      )
-
-      expect {
-        task.invoke
-      }.to raise_error(RuntimeError, 'bulk upsert failed')
-    end
-  end
-end

backend/spec/tasks/nico_sync_spec.rb

@@ -104,7 +104,7 @@ RSpec.describe "nico:sync" do
       url: post.url,
       thumbnail_base: post.thumbnail_base,
       tags: snapshot_tags(post),
-      parent_post_ids: post.snapshot_parent_post_ids.join(' '),
+      parent: post.parent,
       original_created_from: post.original_created_from,
       original_created_before: post.original_created_before,
       created_at: Time.current,

backend/spec/tasks/post_sync_spec.rb

@@ -1,25 +0,0 @@
-require 'rails_helper'
-require 'rake'
-
-RSpec.describe 'post:sync' do
-  around do |example|
-    original_application = Rake.application
-    Rake.application = Rake::Application.new
-
-    Rake::Task.define_task(:environment)
-    load Rails.root.join('lib/tasks/sync_posts.rake')
-
-    example.run
-  ensure
-    Rake.application = original_application
-  end
-
-  it 'runs Youtube::Sync' do
-    sync = instance_double(Youtube::Sync)
-
-    expect(Youtube::Sync).to receive(:new).once.and_return(sync)
-    expect(sync).to receive(:sync!).once
-
-    Rake::Task['post:sync'].invoke
-  end
-end

frontend/src/App.tsx

@@ -10,7 +10,6 @@ import RouteBlockerOverlay from '@/components/RouteBlockerOverlay'
 import TopNav from '@/components/TopNav'
 import { Toaster } from '@/components/ui/toaster'
 import { apiPost, isApiError } from '@/lib/api'
-import DeerjikistDetailPage from '@/pages/deerjikists/DeerjikistDetailPage'
 import MaterialBasePage from '@/pages/materials/MaterialBasePage'
 import MaterialDetailPage from '@/pages/materials/MaterialDetailPage'
 import MaterialListPage from '@/pages/materials/MaterialListPage'
@@ -59,7 +58,6 @@ const RouteTransitionWrapper = ({ user, setUser }: {
 	  <Route path="/posts/changes" element={<PostHistoryPage/>}/>
 	  <Route path="/tags" element={<TagListPage/>}/>
 	  <Route path="/tags/:id" element={<TagDetailPage/>}/>
-	  <Route path="/tags/:id/deerjikists" element={<DeerjikistDetailPage/>}/>
 	  <Route path="/tags/nico" element={<NicoTagListPage user={user}/>}/>
 	  <Route path="/tags/changes" element={<TagHistoryPage/>}/>
 	  <Route path="/theatres/:id" element={<TheatreDetailPage/>}/>

frontend/src/components/PostEditForm.tsx

@@ -4,7 +4,6 @@ import PostFormTagsArea from '@/components/PostFormTagsArea'
 import PostOriginalCreatedTimeField from '@/components/PostOriginalCreatedTimeField'
 import Label from '@/components/common/Label'
 import { Button } from '@/components/ui/button'
-import { toast } from '@/components/ui/use-toast'
 import { apiPut } from '@/lib/api'
 
 import type { FC } from 'react'
@@ -36,34 +35,20 @@ export default (({ post, onSave }: Props) => {
       useState<string | null> (post.originalCreatedBefore)
   const [originalCreatedFrom, setOriginalCreatedFrom] =
       useState<string | null> (post.originalCreatedFrom)
-  const [parentPostIds, setParentPostIds] =
-      useState ((post.parentPosts ?? []).map (p => p.id).join (' '))
-  const [tags, setTags] = useState<string> ('')
   const [title, setTitle] = useState (post.title)
+  const [tags, setTags] = useState<string> ('')
 
   const handleSubmit = async () => {
-    try
-    {
-      const data = await apiPut<Post> (
-	  `/posts/${ post.id }`,
-	  { title, tags, parent_post_ids: parentPostIds,
-	    original_created_from: originalCreatedFrom,
-	    original_created_before: originalCreatedBefore },
-	  { headers: { 'Content-Type': 'multipart/form-data' } })
-      onSave ({ ...post,
-		title:                  data.title,
-		tags:                   data.tags,
-		parentPosts:            data.parentPosts,
-		childPosts:             data.childPosts,
-		siblingPosts:           data.siblingPosts,
-		originalCreatedFrom:    data.originalCreatedFrom,
-		originalCreatedBefore:  data.originalCreatedBefore } as Post)
-      toast ({ description: '更新しました．' })
-    }
-    catch
-    {
-      toast ({ description: '更新はできなかったよ……' })
-    }
+    const data = await apiPut<Post> (
+	`/posts/${ post.id }`,
+	{ title, tags, original_created_from: originalCreatedFrom,
+	  original_created_before: originalCreatedBefore },
+	{ headers: { 'Content-Type': 'multipart/form-data' } })
+    onSave ({ ...post,
+	      title:                  data.title,
+	      tags:                   data.tags,
+	      originalCreatedFrom:    data.originalCreatedFrom,
+	      originalCreatedBefore:  data.originalCreatedBefore } as Post)
   }
 
   useEffect (() => {
@@ -81,16 +66,6 @@ export default (({ post, onSave }: Props) => {
 		 onChange={ev => setTitle (ev.target.value)}/>
 	</div>
 
-	{/* 親投稿 */}
-	<div>
-	  <Label>親投稿</Label>
-	  <input
-	      type="text"
-	      value={parentPostIds}
-	      onChange={e => setParentPostIds (e.target.value)}
-	      className="w-full border p-2 rounded"/>
-	</div>
-
 	{/* タグ */}
 	<PostFormTagsArea tags={tags} setTags={setTags}/>
 

frontend/src/components/PostList.tsx

@@ -3,7 +3,6 @@ import { useRef } from 'react'
 import { useLocation } from 'react-router-dom'
 
 import PrefetchLink from '@/components/PrefetchLink'
-import { cn } from '@/lib/utils'
 import { useSharedTransitionStore } from '@/stores/sharedTransitionStore'
 
 import type { FC, MouseEvent } from 'react'
@@ -40,10 +39,8 @@ export default (({ posts, onClick }: Props) => {
 		<motion.div
 		    ref={cardRef}
 		    layoutId={layoutId}
-		    className={cn ('w-full h-full overflow-hidden rounded-xl shadow',
-				   'transform-gpu will-change-transform',
-				   (post.childPosts ?? []).length > 0 && 'outline-4 outline-green-500',
-				   (post.parentPosts ?? []).length > 0 && 'ring-4 ring-yellow-500')}
+		    className="w-full h-full overflow-hidden rounded-xl shadow
+			       transform-gpu will-change-transform"
 		    whileHover={{ scale: 1.02 }}
 		    onLayoutAnimationStart={() => {
 		      if (!(cardRef.current))

frontend/src/components/TagLink.tsx

@@ -45,9 +45,9 @@ export default (({ tag,
       <>
 	{(linkFlg && withWiki) && (
 	    <span className="mr-1">
-	      {(tag.materialId != null || tag.hasWiki || tag.hasDeerjikists)
+	      {(tag.materialId != null || tag.hasWiki)
 	       ? (
-		  tag.materialId == null && !(tag.hasDeerjikists)
+		  tag.materialId == null
 		  ? (
 		      <PrefetchLink
 			  to={`/wiki/${ encodeURIComponent (tag.name) }`}
@@ -55,19 +55,11 @@ export default (({ tag,
 			?
 		      </PrefetchLink>)
 		  : (
-		      tag.materialId != null
-		      ? (
-			  <PrefetchLink
-			      to={`/materials/${ tag.materialId }`}
-			      className={linkClass}>
-			    ?
-			  </PrefetchLink>)
-		      : (
-			  <PrefetchLink
-			      to={`/tags/${ tag.id }/deerjikists`}
-			      className={linkClass}>
-			    ?
-			  </PrefetchLink>)))
+		      <PrefetchLink
+			  to={`/materials/${ tag.materialId }`}
+			  className={linkClass}>
+			?
+		      </PrefetchLink>))
 	       : (
 		  ['character', 'material'].includes (tag.category)
 		  ? (
@@ -79,23 +71,13 @@ export default (({ tag,
 			!
 		      </PrefetchLink>)
 		  : (
-		      tag.category === 'deerjikist'
-		      ? (
-			  <PrefetchLink
-			      to={`/tags/${ tag.id }/deerjikists`}
-			      className="animate-[wiki-blink_.25s_steps(2,end)_infinite]
-					 dark:animate-[wiki-blink-dark_.25s_steps(2,end)_infinite]"
-			      title={`${ tag.name } に関する情報が存在しません．`}>
-			    !
-			  </PrefetchLink>)
-		      : (
-			  <PrefetchLink
-			      to={`/wiki/${ encodeURIComponent (tag.name) }`}
-			      className="animate-[wiki-blink_.25s_steps(2,end)_infinite]
-					 dark:animate-[wiki-blink-dark_.25s_steps(2,end)_infinite]"
-			      title={`${ tag.name } Wiki が存在しません．`}>
-			    !
-			  </PrefetchLink>)))}
+		      <PrefetchLink
+			  to={`/wiki/${ encodeURIComponent (tag.name) }`}
+			  className="animate-[wiki-blink_.25s_steps(2,end)_infinite]
+				     dark:animate-[wiki-blink-dark_.25s_steps(2,end)_infinite]"
+			  title={`${ tag.name } Wiki が存在しません．`}>
+			!
+		      </PrefetchLink>))}
 	    </span>)}
 	{nestLevel > 0 && (
 	    <span

frontend/src/components/WikiBody.tsx

@@ -1,9 +1,42 @@
-import WikiMarkdown from '@/components/WikiMarkdown'
+import { useQuery } from '@tanstack/react-query'
+import { useMemo } from 'react'
+import ReactMarkdown from 'react-markdown'
+import remarkGFM from 'remark-gfm'
+
+import PrefetchLink from '@/components/PrefetchLink'
+import { wikiKeys } from '@/lib/queryKeys'
+import remarkWikiAutoLink from '@/lib/remark-wiki-autolink'
+import { fetchWikiPages } from '@/lib/wiki'
 
 import type { FC } from 'react'
+import type { Components } from 'react-markdown'
 
 type Props = { title: string
 	       body?: string }
 
-export default (({ title, body }: Props) =>
-    <WikiMarkdown title={title} body={body ?? ''}/>) satisfies FC<Props>
+const mdComponents = { a: (({ href, children }) => (
+			      ['/', '.'].some (e => href?.startsWith (e))
+			      ? <PrefetchLink to={href!}>{children}</PrefetchLink>
+			      : (
+				  <a href={href}
+				     target="_blank"
+				     rel="noopener noreferrer">
+				    {children}
+				  </a>))) } as const satisfies Components
+
+
+export default (({ title, body }: Props) => {
+  const { data } = useQuery ({
+      enabled: Boolean (body),
+      queryKey: wikiKeys.index ({ }),
+      queryFn: () => fetchWikiPages ({ }) })
+  const pageNames = (data ?? []).map (page => page.title).sort ((a, b) => b.length - a.length)
+
+  const remarkPlugins = useMemo (
+      () => [() => remarkWikiAutoLink (pageNames), remarkGFM], [pageNames])
+
+  return (
+      <ReactMarkdown components={mdComponents} remarkPlugins={remarkPlugins}>
+	{body || `このページは存在しません。[新規作成してください](/wiki/new?title=${ encodeURIComponent (title) })。`}
+      </ReactMarkdown>)
+}) satisfies FC<Props>

frontend/src/components/WikiEditForm.tsx

@@ -1,76 +0,0 @@
-import { useEffect, useState } from 'react'
-import MdEditor from 'react-markdown-editor-lite'
-
-import WikiMarkdown from '@/components/WikiMarkdown'
-import Label from '@/components/common/Label'
-import { apiPost } from '@/lib/api'
-
-import type { FC } from 'react'
-
-import type { WikiAsset } from '@/types'
-
-type Props = {
-    title:    string
-    body:     string
-    onSubmit: (title: string, body: string) => void
-    id?:      number | null }
-
-
-export default (({ title: initTitle, body: initBody, onSubmit, id }: Props) => {
-  const forEdit = id != null
-
-  const [title, setTitle] = useState<string> (initTitle)
-  const [body, setBody] = useState<string> (initBody)
-
-  useEffect (() => {
-    setTitle (initTitle)
-    setBody (initBody)
-  }, [initTitle, initBody])
-
-  const handleImageUpload = async (file: File) => {
-    if (!(forEdit))
-      throw new Error ('画像は Wiki 作成前に追加することができません．')
-
-    const formData = new FormData
-    formData.append ('file', file)
-
-    const asset = await apiPost<WikiAsset> (
-	`/wiki/${ id }/assets`,
-	formData,
-	{ headers: { 'Content-Type': 'multipart/form-data' } })
-
-    return asset.url
-  }
-
-  return (
-      <>
-	{/* タイトル */}
-	{/* TODO: タグ補完 */}
-	<div>
-	  <Label>タイトル</Label>
-	  <input
-	      type="text"
-	      value={title}
-	      onChange={e => setTitle (e.target.value)}
-	      className="w-full border p-2 rounded"/>
-	</div>
-
-	{/* 本文 */}
-	<div>
-	  <Label>本文</Label>
-	  <MdEditor
-	      value={body}
-	      style={{ height: '500px' }}
-	      renderHTML={text => <WikiMarkdown body={text} preview/>}
-	      onChange={({ text }) => setBody (text)}
-	      onImageUpload={handleImageUpload}/>
-	</div>
-
-	{/* 送信 */}
-	<button
-	    onClick={() => onSubmit (title, body)}
-	    className="px-4 py-2 bg-blue-600 text-white rounded disabled:bg-gray-400">
-	  {forEdit ? '編輯' : '追加'}
-	</button>
-      </>)
-}) satisfies FC<Props>

frontend/src/components/WikiMarkdown.tsx

@@ -1,77 +0,0 @@
-import { useQuery } from '@tanstack/react-query'
-import { useMemo } from 'react'
-import ReactMarkdown from 'react-markdown'
-import remarkGFM from 'remark-gfm'
-
-import PrefetchLink from '@/components/PrefetchLink'
-import SectionTitle from '@/components/common/SectionTitle'
-import SubsectionTitle from '@/components/common/SubsectionTitle'
-import { wikiKeys } from '@/lib/queryKeys'
-import remarkWikiAutoLink from '@/lib/remark-wiki-autolink'
-import { fetchWikiPages } from '@/lib/wiki'
-
-import type { FC } from 'react'
-import type { Components } from 'react-markdown'
-
-type Props = {
-    title?:   string
-    body:     string
-    preview?: boolean }
-
-
-const makeComponents = (preview = false) => (
-    { h1: ({ children }) => <SectionTitle>{children}</SectionTitle>,
-      h2: ({ children }) => <SubsectionTitle>{children}</SubsectionTitle>,
-      ol: ({ children }) => <ol className="list-decimal pl-6">{children}</ol>,
-      ul: ({ children }) => <ul className="list-disc pl-6">{children}</ul>,
-      a:  ({ href, children }) => {
-	if (!(href))
-	  return <>{children}</>
-
-	if (!(preview) && ['/', '.'].some (e => href.startsWith (e)))
-	  return <PrefetchLink to={href}>{children}</PrefetchLink>
-
-	const ext = /^(?:https?:)?\/\//.test (href)
-
-	return (
-	    <a href={href}
-	       target={ext ? '_blank' : undefined}
-	       rel={ext ? 'noopener noreferrer' : undefined}>
-	      {children}
-	    </a>)
-      },
-      img: (({ src, alt }) => (
-	  <img src={src ?? ''}
-	       alt={alt ?? ''}
-	       className="max-w-[240px] max-h-[320px]"/>)),
-    } as const satisfies Components)
-
-
-export default (({ title, body, preview = false }: Props) => {
-  const { data } = useQuery ({
-      queryKey: wikiKeys.index ({ }),
-      queryFn: () => fetchWikiPages ({ }) })
-
-  const pageNames = useMemo (
-      () => (data ?? []).map ((page) => page.title).sort ((a, b) => b.length - a.length),
-      [data])
-
-  const remarkPlugins = useMemo (
-      () => [() => remarkWikiAutoLink (pageNames), remarkGFM],
-      [pageNames])
-
-  const components = useMemo (
-      () => makeComponents (preview),
-      [preview])
-
-  return (
-      <ReactMarkdown
-	  components={components}
-	  remarkPlugins={remarkPlugins}>
-        {body
-	 || (title
-	     ? ('このページは存在しません。'
-		+`[新規作成してください](/wiki/new?title=${ encodeURIComponent (title) })。`)
-	     : '')}
-      </ReactMarkdown>)
-}) satisfies FC<Props>

frontend/src/consts.ts

@@ -1,4 +1,4 @@
-import type { Category, Platform } from 'types'
+import type { Category } from 'types'
 
 export const LIGHT_COLOUR_SHADE = 800
 export const DARK_COLOUR_SHADE = 300
@@ -31,11 +31,6 @@ export const FETCH_POSTS_ORDER_FIELDS = [
     'updated_at',
     ] as const
 
-export const PLATFORMS = ['nico', 'youtube'] as const
-
-export const PLATFORM_NAMES: Record<Platform, string> =
-    { nico: 'ニコニコ', youtube: 'YouTube' } as const
-
 export const TAG_COLOUR = {
     deerjikist: 'rose',
     meme:       'purple',

frontend/src/lib/queryKeys.ts

@@ -9,12 +9,11 @@ export const postsKeys = {
 		  ['posts', 'changes', p] as const }
 
 export const tagsKeys = {
-    root:         ['tags'] as const,
-    index:        (p: FetchTagsParams) => ['tags', 'index', p] as const,
-    show:         (name: string) => ['tags', name] as const,
-    changes:      (p: { id?: string; page: number; limit: number }) =>
-		      ['tags', 'changes', p] as const,
-    deerjikists:  (id: string) => ['tags', 'deerjikists', id] as const }
+    root:     ['tags'] as const,
+    index:    (p: FetchTagsParams) => ['tags', 'index', p] as const,
+    show:     (name: string) => ['tags', name] as const,
+    changes:  (p: { id?: string; page: number; limit: number }) =>
+		  ['tags', 'changes', p] as const }
 
 export const wikiKeys = {
     root:   ['wiki'] as const,

frontend/src/lib/tags.ts

@@ -1,6 +1,6 @@
 import { apiGet } from '@/lib/api'
 
-import type { Deerjikist, FetchTagsParams, Tag, TagVersion } from '@/types'
+import type { FetchTagsParams, Tag, TagVersion } from '@/types'
 
 
 export const fetchTags = async (
@@ -56,9 +56,3 @@ export const fetchTagChanges = async (
     versions: TagVersion[]
     count:    number }> =>
 	await apiGet ('/tags/versions', { params: { ...(id && { id }), page, limit } })
-
-
-export const fetchDeerjikistsByTag = async (
-    id: string,
-): Promise<{ tag: Tag; deerjikists: Deerjikist[]}> =>
-    await apiGet (`/tags/${ id }/deerjikists`)

frontend/src/pages/deerjikists/DeerjikistDetailPage.tsx

@@ -1,155 +0,0 @@
-import { useQuery, useQueryClient } from '@tanstack/react-query'
-import { useEffect, useState } from 'react'
-import { useParams } from 'react-router-dom'
-
-import TagLink from '@/components/TagLink'
-import Label from '@/components/common/Label'
-import PageTitle from '@/components/common/PageTitle'
-import MainArea from '@/components/layout/MainArea'
-import { toast } from '@/components/ui/use-toast'
-import { PLATFORM_NAMES, PLATFORMS } from '@/consts'
-import { apiPut } from '@/lib/api'
-import { tagsKeys } from '@/lib/queryKeys'
-import { fetchDeerjikistsByTag } from '@/lib/tags'
-import { cn } from '@/lib/utils'
-
-import type { FC, FormEvent } from 'react'
-
-import type { Deerjikist, Platform } from '@/types'
-
-
-export default (() => {
-  const { id } = useParams ()
-  const tagId = String (id ?? '')
-  const tagKey = tagsKeys.deerjikists (tagId)
-
-  const { data: qData, isLoading: loading } =
-      useQuery ({ queryKey: tagKey, queryFn: () => fetchDeerjikistsByTag (tagId) })
-  const tag = qData?.tag
-  const deerjikists = qData?.deerjikists ?? []
-
-  const [data, setData] =
-      useState<(Omit<Deerjikist, 'platform'> & { platform: Platform | null })[]> ([])
-  const [disabled, setDisabled] = useState (true)
-
-  const qc = useQueryClient ()
-
-  const handleSubmit = async (e: FormEvent) => {
-    e.preventDefault ()
-
-    try
-    {
-      setDisabled (true)
-
-      setData (await apiPut<Deerjikist[]> (`/tags/${ id }/deerjikists`, data))
-      qc.invalidateQueries ({ queryKey: tagsKeys.root })
-
-      toast ({ description: '更新しました．' })
-    }
-    catch
-    {
-      toast ({ title: '更新失敗', description: '入力内容を確認してください．' })
-    }
-    finally
-    {
-      setDisabled (false)
-    }
-  }
-
-  useEffect (() => {
-    if (!(tag))
-      {
-	setDisabled (true)
-	return
-      }
-
-    setData (deerjikists)
-    setDisabled (false)
-  }, [tag, deerjikists])
-
-  return (
-      <MainArea>
-	{(loading || !(tag)) ? 'Loading...' : (
-	    <div className="max-w-xl">
-	      <PageTitle>
-		<TagLink tag={tag} withWiki={false} withCount={false}/>
-	      </PageTitle>
-
-	      <form onSubmit={handleSubmit} className="my-4 space-y-2">
-		{data.map ((datum, i) => (
-		    <fieldset key={i} className="min-w-0 rounded-lg border border-gray-300
-						 dark:border-gray-700 p-4">
-		      <legend className="px-2 text-sm font-semibold text-gray-700
-					 dark:text-gray-300">
-			<button
-			    type="button"
-			    disabled={disabled}
-			    onClick={() => setData (prev => [...prev.slice (0, i),
-							     ...prev.slice (i + 1)])}>
-			  #{i + 1}
-			</button>
-		      </legend>
-
-		      {/* プラットフォーム */}
-		      <div>
-			<Label>プラットフォーム</Label>
-			<select
-			    className="w-full border p-2 rounded"
-			    disabled={disabled}
-			    value={datum.platform ?? ''}
-			    onChange={e => setData (prev => {
-			      const rtn = [...prev]
-			      rtn[i] = { ...rtn[i],
-					 platform: (e.target.value || null) as Platform | null }
-			      return rtn
-			    })}>
-			  <option value="">&nbsp;</option>
-			  {PLATFORMS.map (p => (
-			      <option key={p} value={p}>
-				{PLATFORM_NAMES[p]}
-			      </option>))}
-			</select>
-		      </div>
-
-		      {/* コード */}
-		      <div>
-			<Label>コード</Label>
-			<input
-			    type="text"
-			    disabled={disabled}
-			    className="w-full border p-2 rounded"
-			    value={datum.code}
-			    onChange={e => setData (prev => {
-			      const rtn = [...prev]
-			      rtn[i] = { ...rtn[i], code: e.target.value }
-			      return rtn
-			    })}/>
-		      </div>
-		    </fieldset>
-		))}
-
-		<div className="py-3">
-		  <button
-		      type="button"
-		      disabled={disabled}
-		      onClick={() => setData (prev => [...prev, { platform: null, code: '' }])}>
-		    +
-		  </button>
-		</div>
-
-		<div className="py-3">
-		  <button
-		      type="submit"
-		      disabled={disabled}
-		      className={cn ('px-4 py-2 rounded',
-				     (disabled
-				      ? 'text-gray-300 bg-gray-500'
-				      : 'text-white bg-blue-500'))}>
-		    更新
-		  </button>
-		</div>
-	      </form>
-	    </div>
-	)}
-      </MainArea>)
-}) satisfies FC

frontend/src/pages/posts/PostDetailPage.tsx

@@ -21,7 +21,7 @@ import ServiceUnavailable from '@/pages/ServiceUnavailable'
 
 import type { FC } from 'react'
 
-import type { NiconicoViewerHandle, Post, User } from '@/types'
+import type { NiconicoViewerHandle, User } from '@/types'
 
 type Props = { user: User | null }
 
@@ -108,34 +108,6 @@ export default (({ user }: Props) => {
 	  {post
 	   ? (
 	      <>
-		{(post.childPosts ?? []).length > 0 && (
-		    <div className="mb-4 bg-green-200 dark:bg-green-800 text-sm p-2 rounded-md">
-		      <p>この投稿には {post.childPosts!.length} 件の子投稿があります．</p>
-		      <PostList posts={[{ ...post, childPosts: [{ } as Post] },
-					...post.childPosts!.map (p => ({
-					    ...p, parentPosts: [{ } as Post] }))]}/>
-		    </div>
-		)}
-		{(post.parentPosts ?? []).map (pp => {
-		  const siblings = post.siblingPosts?.[String (pp.id) as `${ number }`]
-		  if (!(siblings))
-		    return
-
-		  return (
-		      <div
-			  key={pp.id}
-			  className="mb-4 bg-yellow-200 dark:bg-yellow-800 text-sm p-2 rounded-md">
-			<p>
-			  この投稿には 1 件の親投稿{
-			      siblings.length > 1
-			      && `と ${ siblings.length - 1 } 件の姉妹投稿`}があります．
-			</p>
-			<PostList posts={[{ ...pp, childPosts: [{ } as Post] },
-					  ...siblings.map (p => ({
-					      ...p, parentPosts: [{ } as Post] }))]}/>
-		      </div>)
-		})}
-
 		{(post.thumbnail || post.thumbnailBase) && (
 		    <motion.div
 			layoutId={`page-${ id }`}
@@ -174,6 +146,7 @@ export default (({ user }: Props) => {
 					       (prev: any) => newPost ?? prev)
 			      qc.invalidateQueries ({ queryKey: postsKeys.root })
 			      qc.invalidateQueries ({ queryKey: tagsKeys.root })
+			      toast ({ description: '更新しました．' })
 			    }}/>
 		      </Tab>)}
 		</TabGroup>

frontend/src/pages/posts/PostHistoryPage.tsx

@@ -95,8 +95,6 @@ export default (() => {
 		    <col className="w-96"/>
 		    {/* タグ */}
 		    <col className="w-[48rem]"/>
-		    {/* TODO: 親投稿 */}
-		    {/* <col className="w-[48rem]"/> */}
 		    {/* オリジナルの投稿日時 */}
 		    <col className="w-96"/>
 		    {/* 更新日時 */}
@@ -112,8 +110,6 @@ export default (() => {
 		      <th className="p-2 text-left">タイトル</th>
 		      <th className="p-2 text-left">URL</th>
 		      <th className="p-2 text-left">タグ</th>
-		      {/* TODO: 親投稿の履歴 */}
-		      {/* <th className="p-2 text-left">親投稿</th> */}
 		      <th className="p-2 text-left">オリジナルの投稿日時</th>
 		      <th className="p-2 text-left">更新日時</th>
 		      <th className="p-2"/>
@@ -184,29 +180,6 @@ export default (() => {
 					    {tag.name}
 					  </span>))))}
 			    </td>
-			    {/* TODO: 親投稿の履歴 */}
-			    {/* <td className="p-2">
-			      {change.parentPosts.map ((pp, i) => (
-				  pp.type === 'added'
-				  ? (
-				      <ins
-					  key={i}
-					  className="mr-2 text-green-600 dark:text-green-400">
-					{pp.title}
-				      </ins>)
-				  : (
-				      pp.type === 'removed'
-				      ? (
-					  <del
-					      key={i}
-					      className="mr-2 text-red-600 dark:text-red-400">
-					    {pp.title}
-					  </del>)
-				      : (
-					  <span key={i} className="mr-2">
-					    {pp.title}
-					  </span>))))}
-			    </td> */}
 			    <td className="p-2">
 			      {change.versionNo === 1
 			       ? originalCreatedAtString (change.originalCreatedFrom.current,
@@ -252,11 +225,6 @@ export default (() => {
 						  .map (t => t.name)
 						  .filter (t => t.slice (0, 5) !== 'nico:')
 						  .join (' '),
-					    parent_post_ids:
-						(change.parentPosts ?? [])
-						.filter (p => p.type !== 'removed')
-						.map (p => p.id)
-						.join (' '),
 					    original_created_from:
 						change.originalCreatedFrom.current,
 					    original_created_before:

frontend/src/pages/posts/PostNewPage.tsx

@@ -29,7 +29,6 @@ export default (({ user }: Props) => {
 
   const [originalCreatedBefore, setOriginalCreatedBefore] = useState<string | null> (null)
   const [originalCreatedFrom, setOriginalCreatedFrom] = useState<string | null> (null)
-  const [parentPostIds, setParentPostIds] = useState ('')
   const [tags, setTags] = useState ('')
   const [thumbnailAutoFlg, setThumbnailAutoFlg] = useState (true)
   const [thumbnailFile, setThumbnailFile] = useState<File | null> (null)
@@ -47,7 +46,6 @@ export default (({ user }: Props) => {
     formData.append ('title', title)
     formData.append ('url', url)
     formData.append ('tags', tags)
-    formData.append ('parent_post_ids', parentPostIds)
     if (thumbnailFile)
       formData.append ('thumbnail', thumbnailFile)
     if (originalCreatedFrom)
@@ -179,16 +177,6 @@ export default (({ user }: Props) => {
 		     className="mt-2 max-h-48 rounded border"/>)}
 	  </div>
 
-	  {/* 親投稿 */}
-	  <div>
-	    <Label>親投稿</Label>
-	    <input
-		type="text"
-		value={parentPostIds}
-		onChange={e => setParentPostIds (e.target.value)}
-		className="w-full border p-2 rounded"/>
-	  </div>
-
 	  {/* タグ */}
 	  <PostFormTagsArea tags={tags} setTags={setTags}/>
 

frontend/src/pages/wiki/WikiEditPage.tsx

@@ -1,9 +1,10 @@
 import { useQueryClient } from '@tanstack/react-query'
+import MarkdownIt from 'markdown-it'
 import { useEffect, useState } from 'react'
 import { Helmet } from 'react-helmet-async'
+import MdEditor from 'react-markdown-editor-lite'
 import { useParams, useNavigate } from 'react-router-dom'
 
-import WikiEditForm from '@/components/WikiEditForm'
 import MainArea from '@/components/layout/MainArea'
 import { toast } from '@/components/ui/use-toast'
 import { SITE_TITLE } from '@/config'
@@ -17,6 +18,8 @@ import type { FC } from 'react'
 
 import type { User, WikiPage } from '@/types'
 
+const mdParser = new MarkdownIt
+
 type Props = { user: User | null }
 
 
@@ -34,7 +37,7 @@ export default (({ user }: Props) => {
   const [loading, setLoading] = useState (true)
   const [title, setTitle] = useState ('')
 
-  const handleSubmit = async (title: string, body: string) => {
+  const handleSubmit = async () => {
     const formData = new FormData ()
     formData.append ('title', title)
     formData.append ('body', body)
@@ -43,6 +46,8 @@ export default (({ user }: Props) => {
     {
       await apiPut (`/wiki/${ id }`, formData,
 		    { headers: { 'Content-Type': 'multipart/form-data' } })
+      qc.setQueryData (wikiKeys.show (title, { }),
+		       (prev: WikiPage) => ({ ...prev, title, body }))
       qc.invalidateQueries ({ queryKey: wikiKeys.root })
       toast ({ title: '投稿成功!' })
       navigate (`/wiki/${ title }`)
@@ -72,11 +77,32 @@ export default (({ user }: Props) => {
 	  <h1 className="text-2xl font-bold mb-2">Wiki ページを編輯</h1>
 
 	  {loading ? 'Loading...' : (
-	      <WikiEditForm
-		  title={title}
-		  body={body}
-		  onSubmit={handleSubmit}
-		  id={Number (id)}/>)}
+	      <>
+		{/* タイトル */}
+		{/* TODO: タグ補完 */}
+		<div>
+		  <label className="block font-semibold mb-1">タイトル</label>
+		  <input type="text"
+			 value={title}
+			 onChange={e => setTitle (e.target.value)}
+			 className="w-full border p-2 rounded"/>
+		</div>
+
+		{/* 本文 */}
+		<div>
+		  <label className="block font-semibold mb-1">本文</label>
+		  <MdEditor value={body}
+			    style={{ height: '500px' }}
+			    renderHTML={text => mdParser.render (text)}
+			    onChange={({ text }) => setBody (text)}/>
+		</div>
+
+		{/* 送信 */}
+		<button onClick={handleSubmit}
+			className="px-4 py-2 bg-blue-600 text-white rounded disabled:bg-gray-400">
+		  編輯
+		</button>
+	      </>)}
 	</div>
       </MainArea>)
 }) satisfies FC<Props>

frontend/src/pages/wiki/WikiNewPage.tsx

@@ -1,19 +1,21 @@
-import { useQueryClient } from '@tanstack/react-query'
+import MarkdownIt from 'markdown-it'
+import { useState } from 'react'
 import { Helmet } from 'react-helmet-async'
+import MdEditor from 'react-markdown-editor-lite'
 import { useLocation, useNavigate } from 'react-router-dom'
 
-import WikiEditForm from '@/components/WikiEditForm'
 import MainArea from '@/components/layout/MainArea'
 import { toast } from '@/components/ui/use-toast'
 import { SITE_TITLE } from '@/config'
 import { apiPost } from '@/lib/api'
-import { wikiKeys } from '@/lib/queryKeys'
 import Forbidden from '@/pages/Forbidden'
 
 import 'react-markdown-editor-lite/lib/index.css'
 
 import type { User, WikiPage } from '@/types'
 
+const mdParser = new MarkdownIt
+
 type Props = { user: User | null }
 
 
@@ -24,12 +26,13 @@ export default ({ user }: Props) => {
   const location = useLocation ()
   const navigate = useNavigate ()
 
-  const qc = useQueryClient ()
-
   const query = new URLSearchParams (location.search)
   const titleQuery = query.get ('title') ?? ''
 
-  const handleSubmit = async (title: string, body: string) => {
+  const [title, setTitle] = useState (titleQuery)
+  const [body, setBody] = useState ('')
+
+  const handleSubmit = async () => {
     const formData = new FormData
     formData.append ('title', title)
     formData.append ('body', body)
@@ -37,8 +40,7 @@ export default ({ user }: Props) => {
     try
     {
       const data = await apiPost<WikiPage> ('/wiki', formData,
-	  { headers: { 'Content-Type': 'multipart/form-data' } })
-      qc.invalidateQueries ({ queryKey: wikiKeys.root })
+				  { headers: { 'Content-Type': 'multipart/form-data' } })
       toast ({ title: '投稿成功!' })
       navigate (`/wiki/${ data.title }`)
     }
@@ -56,10 +58,30 @@ export default ({ user }: Props) => {
 	<div className="max-w-xl mx-auto p-4 space-y-4">
 	  <h1 className="text-2xl font-bold mb-2">新規 Wiki ページ</h1>
 
-	  <WikiEditForm
-	      title={titleQuery}
-	      body=""
-	      onSubmit={handleSubmit}/>
+	  {/* タイトル */}
+	  {/* TODO: タグ補完 */}
+	  <div>
+	    <label className="block font-semibold mb-1">タイトル</label>
+	    <input type="text"
+		   value={title}
+		   onChange={e => setTitle (e.target.value)}
+		   className="w-full border p-2 rounded"/>
+	  </div>
+
+	  {/* 本文 */}
+	  <div>
+	    <label className="block font-semibold mb-1">本文</label>
+	    <MdEditor value={body}
+		      style={{ height: '500px' }}
+		      renderHTML={text => mdParser.render (text)}
+		      onChange={({ text }) => setBody (text)}/>
+	  </div>
+
+	  {/* 送信 */}
+	  <button onClick={handleSubmit}
+		  className="px-4 py-2 bg-blue-600 text-white rounded disabled:bg-gray-400">
+	    追加
+	  </button>
 	</div>
       </MainArea>)
 }

frontend/src/types.ts

@@ -1,6 +1,5 @@
 import { CATEGORIES,
 	 FETCH_POSTS_ORDER_FIELDS,
-	 PLATFORMS,
 	 USER_ROLES,
 	 ViewFlagBehavior } from '@/consts'
 
@@ -8,8 +7,6 @@ import type { ReactNode } from 'react'
 
 export type Category = typeof CATEGORIES[number]
 
-export type Deerjikist = { platform: Platform; code: string }
-
 export type FetchPostsOrder = `${ FetchPostsOrderField }:${ 'asc' | 'desc' }`
 
 export type FetchPostsOrderField = typeof FETCH_POSTS_ORDER_FIELDS[number]
@@ -117,8 +114,6 @@ export type NiconicoViewerHandle = {
     showComments: () => void
     hideComments: () => void }
 
-export type Platform = typeof PLATFORMS[number]
-
 export type Post = {
     id:                     number
     url:                    string
@@ -126,9 +121,6 @@ export type Post = {
     thumbnail:              string | null
     thumbnailBase:          string | null
     tags:                   Tag[]
-    parentPosts?:           Post[]
-    childPosts?:            Post[]
-    siblingPosts?:          Record<`${ number }`, Post[]>
     viewed:                 boolean
     related:                Post[]
     originalCreatedFrom:    string | null
@@ -152,11 +144,7 @@ export type PostVersion = {
     url:                    { current: string; prev: string | null }
     thumbnail:              { current: string | null; prev: string | null }
     thumbnailBase:          { current: string | null; prev: string | null }
-    tags:                   { name: string
-			      type: 'context' | 'added' | 'removed' }[]
-    parentPosts:            { id: number
-			      title: string
-			      type: 'context' | 'added' | 'removed' }[]
+    tags:                   { name: string; type: 'context' | 'added' | 'removed' }[]
     originalCreatedFrom:    { current: string | null; prev: string | null }
     originalCreatedBefore:  { current: string | null; prev: string | null }
     createdAt:              string
@@ -183,8 +171,7 @@ export type Tag = {
     createdAt:      string
     updatedAt:      string
     hasWiki:        boolean
-    materialId:     number | null
-    hasDeerjikists: boolean
+    materialId:     number
     children?:      Tag[]
     matchedAlias?:  string | null }
 
@@ -223,11 +210,6 @@ export type User = {
 
 export type ViewFlagBehavior = typeof ViewFlagBehavior[keyof typeof ViewFlagBehavior]
 
-export type WikiAsset = {
-    wikiPageId: number
-    no:         number
-    url:        string }
-
 export type WikiPage = {
     id:             number
     title:          string