#309

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,
+    linked_tags = Tag.normalise_tags(linked_tag_names, with_tagme: false,
-                                                        with_no_deerjikist: 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/tag_versions_controller.rb

@@ -1,92 +0,0 @@
-class TagVersionsController < ApplicationController
-  def index
-    tag_id = params[:id].presence
-    page = (params[:page].presence || 1).to_i
-    limit = (params[:limit].presence || 20).to_i
-
-    page = 1 if page < 1
-    limit = 1 if limit < 1
-
-    offset = (page - 1) * limit
-
-    q = TagVersion.joins(<<~SQL.squish)
-          LEFT JOIN
-            tag_versions prev
-            ON
-              prev.tag_id = tag_versions.tag_id
-              AND prev.version_no = tag_versions.version_no - 1
-        SQL
-      .select('tag_versions.*', 'prev.name AS prev_name', 'prev.category AS prev_category',
-              'prev.aliases AS prev_aliases', 'prev.parent_tag_ids AS prev_parent_tag_ids')
-    q = q.where('tag_versions.tag_id = ?', tag_id) if tag_id
-
-    count = q.except(:select, :order, :limit, :offset).count
-
-    versions = q.order(Arel.sql('tag_versions.created_at DESC, tag_versions.id DESC'))
-                .limit(limit)
-                .offset(offset)
-
-    render json: { versions: serialise_versions(versions), count: }
-  end
-
-  private
-
-  def serialise_versions rows
-    user_ids = rows.map(&:created_by_user_id).compact.uniq
-    users_by_id = User.where(id: user_ids).pluck(:id, :name).to_h
-
-    rows.map do |row|
-      cur_aliases = split_values(row.aliases)
-      prev_aliases = split_values(row.attributes['prev_aliases'])
-
-      cur_parent_tag_ids = split_parent_tag_ids(row.parent_tag_ids)
-      prev_parent_tag_ids = split_parent_tag_ids(row.attributes['prev_parent_tag_ids'])
-
-      all_parent_tag_ids = (cur_parent_tag_ids | prev_parent_tag_ids)
-
-      tags_by_id =
-          Tag
-          .includes(:tag_name, :materials, { tag_name: :wiki_page })
-          .where(id: all_parent_tag_ids)
-          .index_by(&:id)
-
-      parent_tags =
-          build_version_values(cur_parent_tag_ids, prev_parent_tag_ids, key: :tag_id)
-          .map do |h|
-            { tag: TagRepr.base(tags_by_id[h[:tag_id]]),
-              type: h[:type] }
-          end
-
-      { tag_id: row.tag_id,
-        version_no: row.version_no,
-        event_type: row.event_type,
-        name: { current: row.name, prev: row.attributes['prev_name'] },
-        category: { current: row.category, prev: row.attributes['prev_category'] },
-        aliases: build_version_values(cur_aliases, prev_aliases, key: :name),
-        parent_tags:,
-        created_at: row.created_at.iso8601,
-        created_by_user: row.created_by_user_id &&
-                         { id: row.created_by_user_id,
-                           name: users_by_id[row.created_by_user_id] } }
-    end
-  end
-
-  def build_version_values cur_values, prev_values, key:
-    (cur_values | prev_values).map do |value|
-      type =
-          if cur_values.include?(value) && prev_values.include?(value)
-            'context'
-          elsif cur_values.include?(value)
-            'added'
-          else
-            'removed'
-          end
-
-      { key => value, type: }
-    end
-  end
-
-  def split_values(values) = values.to_s.split(/\s+/).reject(&:blank?)
-
-  def split_parent_tag_ids(values) = split_values(values).map(&:to_i)
-end

backend/app/controllers/tags_controller.rb

@@ -66,7 +66,7 @@ class TagsController < ApplicationController
             .offset(offset)
             .to_a
 
-    render json: { tags: TagRepr.many(tags), count: q.size }
+    render json: { tags: TagRepr.base(tags), count: q.size }
   end
 
   def with_depth
@@ -209,60 +209,6 @@ class TagsController < ApplicationController
     render json: build_tag_children(tag)
   end
 
-  def update_all
-    return head :unauthorized unless current_user
-    return head :forbidden unless current_user.gte_member?
-
-    tag = Tag.find_by(id: params[:id])
-    return head :not_found unless tag
-
-    name = params[:name].to_s.strip
-    category = params[:category].to_s.strip
-    return head :unprocessable_entity if name.blank? || category.blank?
-
-    if name != tag.name &&
-        tag.in?([Tag.tagme, Tag.bot, Tag.no_deerjikist, Tag.video, Tag.niconico])
-      return render json: { error: 'システム・タグの名称は変更できません．' },
-                    status: :unprocessable_entity
-    end
-
-    if tag.nico? || category == 'nico'
-      return render json: { error: 'ニコタグは変更できません．' },
-                    status: :unprocessable_entity
-    end
-
-    alias_names = params[:aliases].to_s.split.uniq
-    parent_names = params[:parent_tags].to_s.split.uniq
-
-    ApplicationRecord.transaction do
-      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.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:)
-    end
-
-    render json: TagRepr.base(tag.reload)
-  end
-
   def update
     return head :unauthorized unless current_user
     return head :forbidden unless current_user.gte_member?
@@ -272,29 +218,18 @@ class TagsController < ApplicationController
 
     tag = Tag.find(params[:id])
 
-    if tag.nico? || (category.present? && category == 'nico')
+    if category.present? && tag.nico? != (category == 'nico')
-      return render json: { error: 'ニコタグは変更できません．' },
+      return render json: { error: 'ニコタグのカテゴリ変更はできません．' },
                     status: :unprocessable_entity
     end
 
     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)
-
-      record_tag_version!(
-          tag,
-          event_type: :update,
-          created_by_user: current_user,
-          name_changed:,
-          wiki_page:)
     end
 
     render json: TagRepr.base(tag.reload)
@@ -302,7 +237,7 @@ class TagsController < ApplicationController
 
   private
 
-  def build_tag_children tag
+  def build_tag_children(tag)
     material = tag.materials.first
     file = nil
     content_type = nil
@@ -316,79 +251,11 @@ 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
-    end
+      TagVersionRecorder.record!(tag:, event_type:, created_by_user:)
-
-    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)
-
-      alias_tag_name.update!(canonical: nil)
-    end
-
-    alias_names.each do |alias_name|
-      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)
-
-    old_parent_tags = tag.parents.to_a
-
-    TagVersioning.record_tag_snapshots!((old_parent_tags + parent_tags).uniq,
-                                        created_by_user: current_user)
-
-    tag.reversed_tag_implications.destroy_all
-
-    parent_tags.each do |parent_tag|
-      next if parent_tag == tag
-
-      TagImplication.create!(tag:, parent_tag:)
     end
   end
 end

backend/app/controllers/users_controller.rb

@@ -1,26 +1,18 @@
 class UsersController < ApplicationController
   def create
-    return head :unprocessable_entity if request.remote_ip.blank?
+    user = User.create!(inheritance_code: SecureRandom.uuid, role: 'guest')
-
-    user = nil
-
-    User.transaction do
-      user = User.create!(inheritance_code: SecureRandom.uuid, role: :guest)
-      attach_ip_address!(user)
-    end
-
     render json: { code: user.inheritance_code,
-                   user: user.slice(:id, :name, :inheritance_code, :role) },
+                   user: user.slice(:id, :name, :inheritance_code, :role) }
-           status: :created
   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 :unprocessable_entity if request.remote_ip.blank?
+    UserIp.find_or_create_by!(user:, ip_address:)
-
-    attach_ip_address!(user)
 
     render json: { valid: true, user: user.slice(:id, :name, :inheritance_code, :role) }
   end
@@ -49,18 +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_pages_controller.rb

@@ -85,24 +85,22 @@ 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 =
+      render json: WikiPageRepr.base(page), status: :created
-        Wiki::Commit.create_content!(
+    else
-            tag_name:,
+      render json: { errors: page.errors.full_messages },
-            body:,
+             status: :unprocessable_entity
-            created_by_user: current_user,
+    end
-            message:)
-
-    render json: WikiPageRepr.base(page), status: :created
-  rescue ActiveRecord::RecordInvalid, ActiveRecord::RecordNotUnique
-    head :unprocessable_entity
   end
 
   def update
@@ -115,34 +113,19 @@ class WikiPagesController < ApplicationController
     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
+    if params[:title].present? && params[:title].strip != page.title
-      page.lock!
+      return head :unprocessable_entity
-
-      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
     end
 
+    message = params[:message].presence
+    Wiki::Commit.content!(page:,
+                          body:,
+                          created_user: current_user,
+                          message:,
+                          base_revision_id:)
+
     head :ok
   end
 

backend/app/models/ip_address.rb

@@ -2,6 +2,5 @@ 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
-  has_many :users, through: :user_ips
 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? ?
+    super(options).merge({ thumbnail: thumbnail.attached? ?
-                                    Rails.application.routes.url_helpers.rails_blob_url(
+                                      Rails.application.routes.url_helpers.rails_blob_url(
-                                        thumbnail, only_path: false) :
+                                          thumbnail, only_path: false) :
-                                    nil)
+                                      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/tag.rb

@@ -85,9 +85,9 @@ class Tag < ApplicationRecord
   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.normalise_tags! tag_names, with_tagme: true,
+  def self.normalise_tags tag_names, with_tagme: true,
-                                      with_no_deerjikist: true,
+                                     with_no_deerjikist: true,
-                                      deny_nico: true
+                                     deny_nico: true
     if deny_nico && tag_names.any? { |n| n.downcase.start_with?('nico:') }
       raise NicoTagNormalisationError
     end

backend/app/models/wiki_page.rb

@@ -13,11 +13,8 @@ class WikiPage < ApplicationRecord
            foreign_key: :redirect_page_id,
            dependent: :nullify
 
-  has_many :wiki_versions
-
   belongs_to :tag_name
   validates :tag_name, presence: true
-  validates :body, presence: true
 
   def title = tag_name.name
 
@@ -27,6 +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 },
+  BASE = { include: { tags: TagRepr::BASE, uploaded_user: UserRepr::BASE } }.freeze
-           methods: [:parent_posts, :child_posts, :sibling_posts] }.freeze
 
   module_function
 

backend/app/representations/tag_repr.rb

@@ -8,9 +8,10 @@ module TagRepr
   module_function
 
   def base tag
-    tag.as_json(BASE).merge(aliases: tag.snapshot_aliases,
+    tag.as_json(BASE)
-                            parents: tag.parents.map { _1.as_json(BASE) })
   end
 
-  def many(tags) = tags.map { |t| base(t) }
+  def many tags
+    tags.map { |t| base(t) }
+  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)
+      normalised = normalise_body(body)
-      if normalised.blank?
-        @page.errors.add(:body, :blank)
-        raise ActiveRecord::RecordInvalid, @page
-      end
-
       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" +
+                "競合が発生してゐます（現在の Id.：#{ current_id }，ベース Id.：#{ base_revision_id }）．"
-                "（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
+        if base_revision_id.present?
-      s = body.to_s
+          current_id = @page.wiki_revisions.maximum(:id)
-      s.gsub!(/\r\n?/, "\n")
+          if current_id && current_id != base_revision_id.to_i
-      s.encode('UTF-8', invalid: :replace, undef: :replace, replace: '🖕')
+            raise Conflict,
-      s.gsub(/\n+$/, '')
+                "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] = {
+        missing_rows << { sha256:     sha,
-            sha256:     sha,
+                          body:       lines[i],
-            body:       lines[i],
+                          created_at: now,
-            created_at: now,
+                          updated_at: now }
-            updated_at: now }
       end
 
-      if missing_by_sha.any?
+      if missing_rows.any?
-        WikiLine.upsert_all(missing_by_sha.values)
+        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/config/routes.rb

@@ -6,11 +6,10 @@ Rails.application.routes.draw do
     delete ':child_id', action: :destroy
   end
 
-  resources :tags, only: [:index, :show] do
+  resources :tags, only: [:index, :show, :update] do
     collection do
       get :autocomplete
       get :'with-depth', action: :with_depth
-      get :versions, to: 'tag_versions#index'
 
       scope :name do
         get ':name/deerjikists', action: :deerjikists_by_name
@@ -20,9 +19,6 @@ Rails.application.routes.draw do
     end
 
     member do
-      put '', action: :update_all
-      patch '', action: :update
-
       get :deerjikists
     end
   end

backend/config/schedule.rb

@@ -1,19 +1,12 @@
 env :PATH, '/root/.rbenv/shims:/root/.rbenv/bin:/usr/local/bin:/usr/bin:/bin'
 
-set :path, '/var/www/btrc-hub/backend'
-set :environment, 'production'
 set :output, standard: '/var/log/btrc_hub_nico_sync.log',
              error:    '/var/log/btrc_hub_nico_sync_err.log'
 
-job_type :rake,
+every 1.day, at: '3:00 pm' do
-         'cd :path && set -a && . /etc/btrc-hub/backend.env && set +a && ' \
-         ':environment_variable=:environment bundle exec rake :task --silent :output'
-
-every 1.day, at: '11:00 am' do
   rake 'nico:sync', environment: 'production'
 end
 
 every 1.day, at: '0:00 am' do
   rake 'post_similarity:calc', environment: 'production'
-  rake 'tag_similarity:calc', environment: 'production'
 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/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_04_27_214800) 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
@@ -119,15 +119,6 @@ ActiveRecord::Schema[8.0].define(version: 2026_04_27_214800) 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
@@ -164,12 +155,13 @@ ActiveRecord::Schema[8.0].define(version: 2026_04_27_214800) 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"
@@ -180,11 +172,13 @@ ActiveRecord::Schema[8.0].define(version: 2026_04_27_214800) 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
@@ -360,7 +354,6 @@ ActiveRecord::Schema[8.0].define(version: 2026_04_27_214800) 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
@@ -403,22 +396,6 @@ ActiveRecord::Schema[8.0].define(version: 2026_04_27_214800) 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"
@@ -434,8 +411,6 @@ ActiveRecord::Schema[8.0].define(version: 2026_04_27_214800) 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"
@@ -443,7 +418,9 @@ ActiveRecord::Schema[8.0].define(version: 2026_04_27_214800) 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"
@@ -476,6 +453,4 @@ ActiveRecord::Schema[8.0].define(version: 2026_04_27_214800) 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/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!
+        WikiPage.create!(
-
+          tag_name: source_tag_name,
-        Wiki::Commit.create_content!(
+          created_user: create_admin_user!,
-            tag_name: source_tag_name,
+          updated_user: create_admin_user!
-            body: 'source wiki body',
+        )
-            created_by_user: admin,
-            message: 'init')
       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',
+      post '/posts', params: { title: 't', url: 'https://example.com/x', tags: 'a', thumbnail: dummy_upload }
-                                               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',
+      post '/posts', params: { title: 't', url: 'https://example.com/x', tags: 'a', thumbnail: dummy_upload }
-                                               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(
+        post '/posts', params: {
-          title: 'new post',
+            title: 'new post',
-          url: 'https://example.com/nico-tag-post',
+            url: 'https://example.com/nico_tag',
-          tags: 'nico:nico_tag',
+            tags: 'nico:nico_tag',
-          thumbnail: dummy_upload
+            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(
+        post '/posts', params: {
-            title: 'new post',
+          title: 'new post',
-            url: 'ぼざクリタグ広場',
+          url: 'ぼざクリタグ広場',
-            tags: 'spec_tag', # 既存タグ名を投げる
+          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}",
           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(
+      put "/posts/#{post_record.id}", params: {
-          title: 'updated title',
+        title: 'updated title',
-          tags: 'spec_tag_2')
+        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(
+        put "/posts/#{ post_record.id }", 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: {
             title: 'updated title',
-            tags: 'spec_tag' }
+            tags: 'nico:nico_tag' }
 
-        expect(response).to have_http_status(:unprocessable_entity)
+        expect(response).to have_http_status(:bad_request)
-        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)
       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:,
+        post: post,
-        version_no:,
+        version_no: version_no,
-        event_type:,
+        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_at: created_at,
-        created_by_user:
+        created_by_user: created_by_user
       )
     end
 
@@ -1409,15 +1015,33 @@ RSpec.describe 'Posts API', type: :request do
       post.snapshot_tag_names.join(' ')
     end
 
+    def create_post_version_for!(post)
+      PostVersion.create!(
+        post: post,
+        version_no: 1,
+        event_type: 'create',
+        title: post.title,
+        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,
+        created_by_user: post.uploaded_user
+      )
+    end
+
     it 'creates version 1 on POST /posts' do
       sign_in_as(member)
 
       expect do
-        post '/posts', params: post_write_params(
+        post '/posts', params: {
-            title: 'versioned post',
+          title: 'versioned post',
-            url: 'https://example.com/versioned-post',
+          url: 'https://example.com/versioned-post',
-            tags: 'spec_tag',
+          tags: 'spec_tag',
-            thumbnail: dummy_upload)
+          thumbnail: dummy_upload
+        }
       end.to change(PostVersion, :count).by(1)
 
       expect(response).to have_http_status(:created)
@@ -1440,9 +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(
+        put "/posts/#{post_record.id}", params: {
-            title: 'updated title',
+          title: 'updated title',
-            tags: 'spec_tag_2')
+          tags: 'spec_tag_2'
+        }
       end.to change(PostVersion, :count).by(1)
 
       expect(response).to have_http_status(:ok)
@@ -1462,9 +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(
+        put "/posts/#{post_record.id}", params: {
-            title: post_record.title,
+          title: post_record.title,
-            tags: 'spec_tag')
+          tags: 'spec_tag'
+        }
       }.not_to change(PostVersion, :count)
       expect(response).to have_http_status(:ok)
 
@@ -1478,11 +1104,12 @@ RSpec.describe 'Posts API', type: :request do
       sign_in_as(member)
 
       expect do
-        post '/posts', params: post_write_params(
+        post '/posts', params: {
-            title: 'invalid post',
+          title: 'invalid post',
-            url: 'ぼざクリタグ広場',
+          url: 'ぼざクリタグ広場',
-            tags: 'spec_tag',
+          tags: 'spec_tag',
-            thumbnail: dummy_upload)
+          thumbnail: dummy_upload
+        }
       end.not_to change(PostVersion, :count)
 
       expect(response).to have_http_status(:unprocessable_entity)
@@ -1493,11 +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(
+        put "/posts/#{post_record.id}", params: {
-            title: 'updated title',
+          title: 'updated title',
-            tags: 'spec_tag',
+          tags: 'spec_tag',
-            original_created_from: Time.zone.local(2020, 1, 2, 0, 0, 0).iso8601,
+          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)
+          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)
@@ -1511,11 +1139,12 @@ RSpec.describe 'Posts API', type: :request do
       sign_in_as(member)
 
       expect {
-        post '/posts', params: post_write_params(
+        post '/posts', params: {
-            title: 'tag versioned post',
+          title: 'tag versioned post',
-            url: 'https://example.com/tag-versioned-post',
+          url: 'https://example.com/tag-versioned-post',
-            tags: 'spec_tag',
+          tags: 'spec_tag',
-            thumbnail: dummy_upload)
+          thumbnail: dummy_upload
+        }
       }.to change { tag.reload.tag_versions.count }.by(1)
 
       expect(response).to have_http_status(:created)
@@ -1535,9 +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(
+        put "/posts/#{post_record.id}", params: {
-            title: 'updated title',
+          title: 'updated title',
-            tags: 'spec_tag_2')
+          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

@@ -1,243 +0,0 @@
-require 'rails_helper'
-
-RSpec.describe 'TagVersions API', type: :request do
-  let(:member) { create(:user, :member, name: 'version member') }
-
-  let!(:tag) { create(:tag, name: 'tag_versions_target', category: :general) }
-  let!(:other_tag) { create(:tag, name: 'tag_versions_other', category: :general) }
-
-  let!(:parent_shared) { create(:tag, name: 'parent_shared', category: :general) }
-  let!(:parent_old) { create(:tag, name: 'parent_old', category: :general) }
-  let!(:parent_new) { create(:tag, name: 'parent_new', category: :general) }
-  let!(:other_parent) { create(:tag, name: 'other_parent', category: :general) }
-
-  let(:t_v1) { Time.zone.local(2020, 1, 1, 12, 0, 0) }
-  let(:t_v2) { Time.zone.local(2020, 1, 2, 12, 0, 0) }
-  let(:t_other) { Time.zone.local(2020, 1, 3, 12, 0, 0) }
-
-  def create_tag_version!(
-    tag:,
-    version_no:,
-    event_type:,
-    name:,
-    category:,
-    aliases: [],
-    parent_tags: [],
-    created_by_user:,
-    created_at:
-  )
-    TagVersion.create!(
-      tag: tag,
-      version_no: version_no,
-      event_type: event_type,
-      name: name,
-      category: category,
-      aliases: Array(aliases).join(' '),
-      parent_tag_ids: Array(parent_tags).map(&:id).join(' '),
-      created_by_user: created_by_user,
-      created_at: created_at
-    )
-  end
-
-  let!(:v1) do
-    create_tag_version!(
-      tag: tag,
-      version_no: 1,
-      event_type: 'create',
-      name: 'old_tag_name',
-      category: 'general',
-      aliases: ['alias_shared', 'alias_old'],
-      parent_tags: [parent_shared, parent_old],
-      created_by_user: member,
-      created_at: t_v1
-    )
-  end
-
-  let!(:v2) do
-    create_tag_version!(
-      tag: tag,
-      version_no: 2,
-      event_type: 'update',
-      name: 'new_tag_name',
-      category: 'meme',
-      aliases: ['alias_shared', 'alias_new'],
-      parent_tags: [parent_shared, parent_new],
-      created_by_user: member,
-      created_at: t_v2
-    )
-  end
-
-  let!(:other_v1) do
-    create_tag_version!(
-      tag: other_tag,
-      version_no: 1,
-      event_type: 'create',
-      name: 'other_tag_name',
-      category: 'general',
-      aliases: ['other_alias'],
-      parent_tags: [other_parent],
-      created_by_user: member,
-      created_at: t_other
-    )
-  end
-
-  describe 'GET /tags/versions' do
-    it 'returns all versions in reverse chronological order when id is omitted' do
-      get '/tags/versions'
-
-      expect(response).to have_http_status(:ok)
-      expect(json).to include('versions', 'count')
-      expect(json.fetch('count')).to eq(3)
-
-      versions = json.fetch('versions')
-
-      expect(versions.map { |v| [v['tag_id'], v['version_no']] }).to eq([
-        [other_tag.id, 1],
-        [tag.id, 2],
-        [tag.id, 1]
-      ])
-    end
-
-    it 'returns versions for the specified tag with diffs' do
-      get '/tags/versions', params: { id: tag.id }
-
-      expect(response).to have_http_status(:ok)
-      expect(json).to include('versions', 'count')
-      expect(json.fetch('count')).to eq(2)
-
-      versions = json.fetch('versions')
-      expect(versions.map { |v| v['tag_id'] }.uniq).to eq([tag.id])
-      expect(versions.map { |v| v['version_no'] }).to eq([2, 1])
-
-      latest = versions.first
-      expect(latest).to include(
-        'tag_id' => tag.id,
-        'version_no' => 2,
-        'event_type' => 'update',
-        'created_by_user' => {
-          'id' => member.id,
-          'name' => member.name
-        }
-      )
-
-      expect(latest.fetch('name')).to eq(
-        'current' => 'new_tag_name',
-        'prev' => 'old_tag_name'
-      )
-      expect(latest.fetch('category')).to eq(
-        'current' => 'meme',
-        'prev' => 'general'
-      )
-      expect(latest.fetch('aliases')).to include(
-        { 'name' => 'alias_shared', 'type' => 'context' },
-        { 'name' => 'alias_new', 'type' => 'added' },
-        { 'name' => 'alias_old', 'type' => 'removed' }
-      )
-      expect(latest.fetch('parent_tags')).to include(
-        a_hash_including(
-          'type' => 'context',
-          'tag' => a_hash_including(
-            'id' => parent_shared.id
-          )
-        ),
-        a_hash_including(
-          'type' => 'added',
-          'tag' => a_hash_including(
-            'id' => parent_new.id
-          )
-        ),
-        a_hash_including(
-          'type' => 'removed',
-          'tag' => a_hash_including(
-            'id' => parent_old.id
-          )
-        )
-      )
-      expect(latest.fetch('created_at')).to eq(t_v2.iso8601)
-
-      first = versions.second
-      expect(first).to include(
-        'tag_id' => tag.id,
-        'version_no' => 1,
-        'event_type' => 'create',
-        'created_by_user' => {
-          'id' => member.id,
-          'name' => member.name
-        }
-      )
-      expect(first.fetch('name')).to eq(
-        'current' => 'old_tag_name',
-        'prev' => nil
-      )
-      expect(first.fetch('category')).to eq(
-        'current' => 'general',
-        'prev' => nil
-      )
-      expect(first.fetch('aliases')).to include(
-        { 'name' => 'alias_shared', 'type' => 'added' },
-        { 'name' => 'alias_old', 'type' => 'added' }
-      )
-      expect(first.fetch('parent_tags')).to include(
-        a_hash_including(
-          'type' => 'added',
-          'tag' => a_hash_including(
-            'id' => parent_shared.id
-          )
-        ),
-        a_hash_including(
-          'type' => 'added',
-          'tag' => a_hash_including(
-            'id' => parent_old.id
-          )
-        )
-      )
-      expect(first.fetch('created_at')).to eq(t_v1.iso8601)
-    end
-
-    it 'returns empty when the specified tag has no versions' do
-      fresh_tag = create(:tag, name: 'no_versions_tag', category: :general)
-
-      get '/tags/versions', params: { id: fresh_tag.id }
-
-      expect(response).to have_http_status(:ok)
-      expect(json.fetch('versions')).to eq([])
-      expect(json.fetch('count')).to eq(0)
-    end
-
-    it 'clamps page and limit to at least 1' do
-      get '/tags/versions', params: { id: tag.id, page: 0, limit: 0 }
-
-      expect(response).to have_http_status(:ok)
-      expect(json.fetch('count')).to eq(2)
-
-      versions = json.fetch('versions')
-      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_spec.rb

@@ -1,6 +1,7 @@
 require 'cgi'
 require 'rails_helper'
 
+
 RSpec.describe 'Tags API', type: :request do
   let!(:tn) { TagName.create!(name: 'spec_tag') }
   let!(:tag) { Tag.create!(tag_name: tn, category: :general) }
@@ -196,30 +197,6 @@ RSpec.describe 'Tags API', type: :request do
       expect(response_tags.size).to eq(1)
       expect(response_names).to eq(['norm_a'])
     end
-
-    it 'returns aliases and parent tags' do
-      parent_tag = Tag.create!(
-        tag_name: TagName.create!(name: 'index_parent_tag'),
-        category: :meme
-      )
-      TagImplication.create!(tag:, parent_tag:)
-
-      get '/tags', params: { name: 'spec_tag' }
-
-      expect(response).to have_http_status(:ok)
-
-      row = response_tags.find { |t| t['name'] == 'spec_tag' }
-
-      expect(row['aliases']).to include('unko')
-      expect(row['parents'].map { |t| t['name'] }).to include('index_parent_tag')
-
-      parent = row['parents'].find { |t| t['name'] == 'index_parent_tag' }
-      expect(parent).to include(
-        'id' => parent_tag.id,
-        'name' => 'index_parent_tag',
-        'category' => 'meme'
-      )
-    end
   end
 
   describe 'GET /tags/:id' do
@@ -243,28 +220,6 @@ RSpec.describe 'Tags API', type: :request do
         expect(json).to have_key('created_at')
         expect(json).to have_key('updated_at')
       end
-
-      it 'returns aliases and parent tags' do
-        parent_tag = Tag.create!(
-          tag_name: TagName.create!(name: 'show_parent_tag'),
-          category: :character
-        )
-        TagImplication.create!(tag:, parent_tag:)
-
-        request
-
-        expect(response).to have_http_status(:ok)
-
-        expect(json['aliases']).to include('unko')
-        expect(json['parents'].map { |t| t['name'] }).to include('show_parent_tag')
-
-        parent = json['parents'].find { |t| t['name'] == 'show_parent_tag' }
-        expect(parent).to include(
-          'id' => parent_tag.id,
-          'name' => 'show_parent_tag',
-          'category' => 'character'
-        )
-      end
     end
 
     context 'when tag does not exist' do
@@ -404,9 +359,9 @@ RSpec.describe 'Tags API', type: :request do
         expect(tag.category).to eq('meta')
       end
 
-      it '存在しない id なら 404 を返す' do
+      it '存在しない id だと RecordNotFound になる（通常は 404）' do
         patch '/tags/999999999', params: { name: 'x' }
-        expect(response).to have_http_status(:not_found)
+        expect(response.status).to be_in([404, 500])
       end
 
       it 'nico category への変更は 422 を返す' do
@@ -446,18 +401,21 @@ RSpec.describe 'Tags API', type: :request do
         expect(tag.reload.category).to eq('general')
       end
 
-      it 'returns 422 when updating nico tag name' do
+      it 'creates nico tag versions when updating nico tag name' do
         nico_tag_name = TagName.create!(name: 'nico:tags_spec_source')
         nico_tag = Tag.create!(tag_name: nico_tag_name, category: :nico)
 
         expect {
-          patch "/tags/#{ nico_tag.id }", params: { name: 'nico:tags_spec_renamed' }
+          patch "/tags/#{nico_tag.id}", params: { name: 'nico:tags_spec_renamed' }
-        }.not_to change(NicoTagVersion, :count)
+        }.to change(NicoTagVersion, :count).by(2)
 
-        expect(response).to have_http_status(:unprocessable_entity)
+        expect(response).to have_http_status(:ok)
 
-        expect(nico_tag.reload.name).to eq('nico:tags_spec_source')
+        versions = nico_tag.reload.nico_tag_versions.order(:version_no)
-        expect(nico_tag.category).to eq('nico')
+        expect(versions.map(&:event_type)).to eq(['create', 'update'])
+        expect(versions.first.name).to eq('nico:tags_spec_source')
+        expect(versions.second.name).to eq('nico:tags_spec_renamed')
+        expect(versions.second.created_by_user_id).to eq(member_user.id)
       end
 
       it 'returns 422 when changing nico tag category to normal category' do
@@ -471,54 +429,6 @@ 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
 
@@ -661,397 +571,4 @@ RSpec.describe 'Tags API', type: :request do
       expect(response).to have_http_status(:not_found)
     end
   end
-
-  describe 'PUT /tags/:id' do
-    context '未ログイン' do
-      before { stub_current_user(nil) }
-
-      it '401 を返す' do
-        put "/tags/#{ tag.id }", params: {
-          name: 'new',
-          category: 'general',
-          aliases: '',
-          parent_tags: '',
-        }
-
-        expect(response).to have_http_status(:unauthorized)
-      end
-    end
-
-    context 'ログインしてゐるが member でない' do
-      before { stub_current_user(non_member_user) }
-
-      it '403 を返す' do
-        put "/tags/#{ tag.id }", params: {
-          name: 'new',
-          category: 'general',
-          aliases: '',
-          parent_tags: '',
-        }
-
-        expect(response).to have_http_status(:forbidden)
-      end
-    end
-
-    context 'member' do
-      before { stub_current_user(member_user) }
-
-      it '存在しない id なら 404 を返す' do
-        put '/tags/999999999', params: {
-          name: 'new',
-          category: 'general',
-          aliases: '',
-          parent_tags: '',
-        }
-
-        expect(response).to have_http_status(:not_found)
-      end
-
-      it 'name が空なら 422 を返す' do
-        put "/tags/#{ tag.id }", params: {
-          name: '',
-          category: 'general',
-          aliases: '',
-          parent_tags: '',
-        }
-
-        expect(response).to have_http_status(:unprocessable_entity)
-        expect(tag.reload.name).to eq('spec_tag')
-      end
-
-      it 'category が空なら 422 を返す' do
-        put "/tags/#{ tag.id }", params: {
-          name: 'new',
-          category: '',
-          aliases: '',
-          parent_tags: '',
-        }
-
-        expect(response).to have_http_status(:unprocessable_entity)
-        expect(tag.reload.name).to eq('spec_tag')
-        expect(tag.category).to eq('general')
-      end
-
-      it 'name, category, aliases, parent tags をまとめて更新できる' do
-        old_parent = Tag.create!(
-          tag_name: TagName.create!(name: 'put_old_parent'),
-          category: :general
-        )
-        kept_parent = Tag.create!(
-          tag_name: TagName.create!(name: 'put_kept_parent'),
-          category: :general
-        )
-        TagImplication.create!(tag:, parent_tag: old_parent)
-        TagImplication.create!(tag:, parent_tag: kept_parent)
-
-        put "/tags/#{ tag.id }", params: {
-          name: 'put_renamed_tag',
-          category: 'meme',
-          aliases: 'put_alias_a put_alias_b put_alias_a',
-          parent_tags: 'put_kept_parent put_new_parent',
-        }
-
-        expect(response).to have_http_status(:ok)
-
-        tag.reload
-
-        expect(tag.name).to eq('put_renamed_tag')
-        expect(tag.category).to eq('meme')
-
-        expect(TagName.find_by(name: 'put_alias_a').canonical).to eq(tag.tag_name)
-        expect(TagName.find_by(name: 'put_alias_b').canonical).to eq(tag.tag_name)
-
-        old_name_alias = TagName.find_by(name: 'spec_tag')
-        expect(old_name_alias).to be_present
-        expect(old_name_alias.canonical).to eq(tag.tag_name)
-
-        expect(alias_tn.reload.canonical).to be_nil
-
-        expect(tag.parents.map(&:name)).to contain_exactly(
-          'put_kept_parent',
-          'put_new_parent'
-        )
-
-        expect(TagImplication.where(tag:, parent_tag: old_parent)).not_to exist
-
-        expect(json['name']).to eq('put_renamed_tag')
-        expect(json['category']).to eq('meme')
-        expect(json['aliases']).to contain_exactly(
-          'put_alias_a',
-          'put_alias_b',
-          'spec_tag'
-        )
-        expect(json['parents'].map { |t| t['name'] }).to contain_exactly(
-          'put_kept_parent',
-          'put_new_parent'
-        )
-      end
-
-      it 'aliases に現在名を指定しても alias には残さない' do
-        put "/tags/#{ tag.id }", params: {
-          name: 'spec_tag',
-          category: 'general',
-          aliases: 'spec_tag put_alias_self_test',
-          parent_tags: '',
-        }
-
-        expect(response).to have_http_status(:ok)
-
-        tag.reload
-
-        expect(TagName.find_by(name: 'put_alias_self_test').canonical).to eq(tag.tag_name)
-        expect(json['aliases']).to include('put_alias_self_test')
-        expect(json['aliases']).not_to include('spec_tag')
-      end
-
-      it 'parent_tags に自分自身を指定しても自己参照は作らない' do
-        put "/tags/#{ tag.id }", params: {
-          name: 'spec_tag',
-          category: 'general',
-          aliases: 'unko',
-          parent_tags: 'spec_tag',
-        }
-
-        expect(response).to have_http_status(:ok)
-
-        expect(TagImplication.where(tag:, parent_tag: tag)).not_to exist
-        expect(tag.reload.parents).to eq([])
-      end
-
-      it 'initial and update tag versions を作成する' do
-        expect {
-          put "/tags/#{ tag.id }", params: {
-            name: 'put_versioned_tag',
-            category: 'meta',
-            aliases: '',
-            parent_tags: '',
-          }
-        }.to change(TagVersion, :count).by(2)
-
-        expect(response).to have_http_status(:ok)
-
-        versions = tag.reload.tag_versions.order(:version_no)
-
-        expect(versions.map(&:event_type)).to eq(['create', 'update'])
-
-        expect(versions.first.name).to eq('spec_tag')
-        expect(versions.first.category).to eq('general')
-        expect(versions.first.aliases.split).to include('unko')
-
-        expect(versions.second.name).to eq('put_versioned_tag')
-        expect(versions.second.category).to eq('meta')
-        expect(versions.second.aliases.split).to include('spec_tag')
-        expect(versions.second.created_by_user_id).to eq(member_user.id)
-      end
-
-      it 'parent tag の snapshot も作成する' do
-        old_parent = Tag.create!(
-          tag_name: TagName.create!(name: 'put_snapshot_old_parent'),
-          category: :general
-        )
-        new_parent = Tag.create!(
-          tag_name: TagName.create!(name: 'put_snapshot_new_parent'),
-          category: :general
-        )
-        TagImplication.create!(tag:, parent_tag: old_parent)
-
-        put "/tags/#{ tag.id }", params: {
-          name: 'spec_tag',
-          category: 'general',
-          aliases: 'unko',
-          parent_tags: new_parent.name,
-        }
-
-        expect(response).to have_http_status(:ok)
-
-        expect(old_parent.reload.tag_versions.map(&:event_type)).to include('create')
-        expect(new_parent.reload.tag_versions.map(&:event_type)).to include('create')
-      end
-
-      it 'normal tag を nico category には変更できない' do
-        expect {
-          put "/tags/#{ tag.id }", params: {
-            name: 'spec_tag',
-            category: 'nico',
-            aliases: '',
-            parent_tags: '',
-          }
-        }.not_to change(TagVersion, :count)
-
-        expect(response).to have_http_status(:unprocessable_entity)
-
-        expect(tag.reload.name).to eq('spec_tag')
-        expect(tag.category).to eq('general')
-      end
-
-      it 'nico tag は更新できない' do
-        nico_tag = Tag.create!(
-          tag_name: TagName.create!(name: 'nico:put_update_all_ng'),
-          category: :nico
-        )
-
-        expect {
-          put "/tags/#{ nico_tag.id }", params: {
-            name: 'nico:put_update_all_renamed',
-            category: 'nico',
-            aliases: '',
-            parent_tags: '',
-          }
-        }.not_to change(NicoTagVersion, :count)
-
-        expect(response).to have_http_status(:unprocessable_entity)
-
-        expect(nico_tag.reload.name).to eq('nico:put_update_all_ng')
-        expect(nico_tag.category).to eq('nico')
-      end
-
-      it 'system tag の name は変更できない' do
-        system_tag = Tag.tagme
-        old_name = system_tag.name
-        old_category = system_tag.category
-
-        expect {
-          put "/tags/#{ system_tag.id }", params: {
-            name: 'put_system_tag_renamed',
-            category: old_category,
-            aliases: '',
-            parent_tags: '',
-          }
-        }.not_to change(TagVersion, :count)
-
-        expect(response).to have_http_status(:unprocessable_entity)
-
-        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

@@ -1,10 +1,11 @@
 require "rails_helper"
 
+
 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(:created)
+      expect(response).to have_http_status(:ok)
       expect(json["code"]).to be_present
       expect(json["user"]["role"]).to eq("guest")
     end
@@ -37,7 +38,7 @@ RSpec.describe "Users", type: :request do
       sign_in_as(user)
       put "/users/#{user.id}", params: { name: "new-name" }
 
-      expect(response).to have_http_status(:ok)
+      expect(response).to have_http_status(:created)
       expect(json["id"]).to eq(user.id)
       expect(json["name"]).to eq("new-name")
 

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!(
+    WikiPage.create!(tag_name: tn, created_user: user, updated_user: user).tap do |p|
-        tag_name: tn,
+      Wiki::Commit.content!(page: p, body: 'init', created_user: user, message: 'init')
-        body: 'init',
+    end
-        created_by_user: user,
-        message: 'init')
   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,
+            'id'        => page.id,
-            'title' => 'spec_wiki_title')
+            '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
@@ -107,34 +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')
 
-        created_page = WikiPage.find(page_id)
+        page = WikiPage.find(page_id)
-        version = created_page.wiki_versions.order(:version_no).last
+        rev = page.current_revision
-
-        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
         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
@@ -152,41 +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
 
@@ -198,14 +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!(
+      build(:wiki_page, title: 'TestPage').tap do |p|
-          tag_name: test_tag_name,
+        puts p.errors.full_messages unless p.valid?
-          body: "a\nb",
+        p.save!
-          created_by_user: member,
+      end
-          message: 'init')
+    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
@@ -231,6 +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
@@ -241,18 +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
+        end.to change(WikiRevision, :count).by(1)
-            .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
-        )
 
         expect(response).to have_http_status(:ok)
 
@@ -263,60 +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
+    # TODO: コンフリクト未実装のため，実装したらコメント外す．
-      it 'returns 409 when base_revision_id mismatches' do
+    # context 'when conflict' 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
+    #   it 'returns 409 when base_revision_id mismatches' do
-        Wiki::Commit.content!(page: page, body: "zzz", created_user: member, message: 'other edit')
+    #     # 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
-        page.reload
+    #     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
+    #     stale_id = page.wiki_revisions.order(:id).first.id # わざと古い id
-        put "/wiki/#{page.id}",
+    #     put "/wiki/#{page.id}",
-            params: { title: 'TestPage', body: 'x', base_revision_id: stale_id },
+    #         params: { title: 'TestPage', body: 'x', base_revision_id: stale_id },
-            headers: auth_headers(member)
+    #         headers: auth_headers(member)
 
-        expect(response).to have_http_status(:conflict)
+    #     expect(response).to have_http_status(:conflict)
-        json = JSON.parse(response.body)
+    #     json = JSON.parse(response.body)
-        expect(json['error']).to eq('conflict')
+    #     expect(json['error']).to eq('conflict')
-      end
+    #   end
-    end
+    # end
 
     context 'when page not found' do
       it 'returns 404' do
@@ -348,17 +261,14 @@ RSpec.describe 'Wiki API', type: :request do
 
   describe 'GET /wiki/search' do
     before do
-      Wiki::Commit.create_content!(
+      # 追加で検索ヒット用
-          tag_name: TagName.create!(name: 'spec_wiki_title_2'),
+      TagName.create!(name: 'spec_wiki_title_2')
-          body: 'search body 2',
+      WikiPage.create!(tag_name: TagName.find_by!(name: 'spec_wiki_title_2'),
-          created_by_user: user,
+                       created_user: user, updated_user: user)
-          message: 'init')
 
-      Wiki::Commit.create_content!(
+      TagName.create!(name: 'unrelated_title')
-          tag_name: TagName.create!(name: 'unrelated_title'),
+      WikiPage.create!(tag_name: TagName.find_by!(name: 'unrelated_title'),
-          body: 'unrelated body',
+                       created_user: user, updated_user: user)
-          created_by_user: user,
-          message: 'init')
     end
 
     it 'returns up to 20 pages filtered by title like' do
@@ -368,9 +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', 'spec_wiki_title_2')
-      expect(titles).to include('spec_wiki_title')
-      expect(titles).to include('spec_wiki_title_2')
       expect(titles).not_to include('unrelated_title')
     end
 
@@ -421,12 +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, created_user: user, updated_user: user)
-      p2 = WikiPage.create!(
-          tag_name: tn2,
-          body: 'init',
-          created_user: user,
-          updated_user: user)
 
       get "/wiki/changes?id=#{p2.id}"
       expect(response).to have_http_status(:ok)
@@ -495,68 +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 'returns 422 when "to" is redirect revision' do
-    it 'raises because redirect revisions are deprecated' do
+      # redirect revision を作る
-      target_tag_name = TagName.create!(name: 'redirect_deprecated_target')
+      tn2 = TagName.create!(name: 'redirect_target')
-      target =
+      target = WikiPage.create!(tag_name: tn2, created_user: user, updated_user: user)
-          Wiki::Commit.create_content!(
-              tag_name: target_tag_name,
-              body: 'target',
-              created_by_user: user,
-              message: 'init')
 
-      expect {
+      Wiki::Commit.redirect!(page: page, redirect_page: target, created_user: user, message: 'redir')
-        Wiki::Commit.redirect!(
+      redirect_rev = page.current_revision
-          page: page,
+      expect(redirect_rev).to be_redirect
-          redirect_page: target,
+
-          created_user: user,
+      get "/wiki/#{page.id}/diff?from=#{rev_a.id}&to=#{redirect_rev.id}"
-          message: 'redirect',
+      expect(response).to have_http_status(:unprocessable_entity)
-          base_revision_id: page.current_revision.id
+    end
-        )
+
-      }.to raise_error(RuntimeError, '廃止しました．')
+    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/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,

frontend/src/App.tsx

@@ -26,8 +26,6 @@ import PostNewPage from '@/pages/posts/PostNewPage'
 import PostSearchPage from '@/pages/posts/PostSearchPage'
 import ServiceUnavailable from '@/pages/ServiceUnavailable'
 import SettingPage from '@/pages/users/SettingPage'
-import TagDetailPage from '@/pages/tags/TagDetailPage'
-import TagHistoryPage from '@/pages/tags/TagHistoryPage'
 import TagListPage from '@/pages/tags/TagListPage'
 import TheatreDetailPage from '@/pages/theatres/TheatreDetailPage'
 import WikiDetailPage from '@/pages/wiki/WikiDetailPage'
@@ -57,9 +55,7 @@ const RouteTransitionWrapper = ({ user, setUser }: {
 	  <Route path="/posts/:id" element={<PostDetailRoute user={user}/>}/>
 	  <Route path="/posts/changes" element={<PostHistoryPage/>}/>
 	  <Route path="/tags" element={<TagListPage/>}/>
-	  <Route path="/tags/:id" element={<TagDetailPage/>}/>
 	  <Route path="/tags/nico" element={<NicoTagListPage user={user}/>}/>
-	  <Route path="/tags/changes" element={<TagHistoryPage/>}/>
 	  <Route path="/theatres/:id" element={<TheatreDetailPage/>}/>
 	  <Route path="/materials" element={<MaterialBasePage/>}>
 	    <Route index element={<MaterialListPage/>}/>

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/${ post.id }`,
-      const data = await apiPut<Post> (
+	{ title, tags, original_created_from: originalCreatedFrom,
-	  `/posts/${ post.id }`,
+	  original_created_before: originalCreatedBefore },
-	  { title, tags, parent_post_ids: parentPostIds,
+	{ headers: { 'Content-Type': 'multipart/form-data' } })
-	    original_created_from: originalCreatedFrom,
+    onSave ({ ...post,
-	    original_created_before: originalCreatedBefore },
+	      title:                  data.title,
-	  { headers: { 'Content-Type': 'multipart/form-data' } })
+	      tags:                   data.tags,
-      onSave ({ ...post,
+	      originalCreatedFrom:    data.originalCreatedFrom,
-		title:                  data.title,
+	      originalCreatedBefore:  data.originalCreatedBefore } as Post)
-		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……' })
-    }
   }
 
   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',
+		    className="w-full h-full overflow-hidden rounded-xl shadow
-				   'transform-gpu will-change-transform',
+			       transform-gpu will-change-transform"
-				   (post.childPosts ?? []).length > 0 && 'outline-4 outline-green-500',
-				   (post.parentPosts ?? []).length > 0 && 'ring-4 ring-yellow-500')}
 		    whileHover={{ scale: 1.02 }}
 		    onLayoutAnimationStart={() => {
 		      if (!(cardRef.current))

frontend/src/components/TopNav.tsx

@@ -8,7 +8,7 @@ import PrefetchLink from '@/components/PrefetchLink'
 import TopNavUser from '@/components/TopNavUser'
 import { WikiIdBus } from '@/lib/eventBus/WikiIdBus'
 import { tagsKeys, wikiKeys } from '@/lib/queryKeys'
-import { fetchTag, fetchTagByName } from '@/lib/tags'
+import { fetchTagByName } from '@/lib/tags'
 import { cn } from '@/lib/utils'
 import { fetchWikiPage } from '@/lib/wiki'
 
@@ -29,8 +29,6 @@ export const menuOutline = ({ tag, wikiId, user, pathName }: {
   const wikiPageFlg = Boolean (/^\/wiki\/(?!new|changes)[^\/]+/.test (pathName) && wikiId)
   const wikiTitle = pathName.split ('/')[2] ?? ''
 
-  const tagFlg = /^\/tags\/\d+/.test (pathName)
-
   return [
       { name: '広場', to: '/posts', subMenu: [
 	  { name: '一覧', to: '/posts' },
@@ -40,15 +38,10 @@ export const menuOutline = ({ tag, wikiId, user, pathName }: {
 	  { name: 'ヘルプ', to: '/wiki/ヘルプ:広場' }] },
       { name: 'タグ', to: '/tags', subMenu: [
 	  { name: 'マスタ', to: '/tags' },
+	  { name: '別名タグ', to: '/tags/aliases', visible: false },
+	  { name: '上位タグ', to: '/tags/implications', visible: false },
 	  { name: 'ニコニコ連携', to: '/tags/nico' },
-	  { name: '履歴', to: '/tags/changes' },
+	  { name: 'ヘルプ', to: '/wiki/ヘルプ:タグ' }] },
-	  { name: 'ヘルプ', to: '/wiki/ヘルプ:タグ' },
-	  { component: <Separator/>, visible: tagFlg },
-	  { name: `広場 (${ postCount || 0 })`,
-	    to: `/posts?tags=${ encodeURIComponent (tag?.name ?? '') }`,
-	    visible: tagFlg },
-	  { name: '履歴', to: `/tags/changes?id=${ tag?.id }`,
-	    visible: tagFlg && tag?.category !== 'nico' }] },
       { name: '素材', to: '/materials', visible: false, subMenu: [
 	  { name: '一覧', to: '/materials' },
 	  { name: '検索', to: '/materials/search', visible: false }, 
@@ -121,14 +114,12 @@ export default (({ user }: Props) => {
       queryKey: wikiKeys.show (wikiIdStr, { }),
       queryFn: () => fetchWikiPage (wikiIdStr, { }) })
 
-  const tagFlg = /^\/tags\/\d+/.test (location.pathname)
+  const effectiveTitle = wikiPage?.title ?? ''
-  const effectiveTitle = (tagFlg ? location.pathname.split ('/')[2] : wikiPage?.title) ?? ''
 
   const { data: tag } = useQuery ({
       enabled: Boolean (effectiveTitle),
       queryKey: tagsKeys.show (effectiveTitle),
-      queryFn: () => (tagFlg ? fetchTag : fetchTagByName) (effectiveTitle) })
+      queryFn: () => fetchTagByName (effectiveTitle) })
-
 
   const menu = menuOutline ({ tag, wikiId, user, pathName: location.pathname })
   const visibleMenu = menu.filter ((item): item is MenuVisibleItem => item.visible ?? true)

frontend/src/lib/prefetchers.ts

@@ -3,7 +3,7 @@ import { match } from 'path-to-regexp'
 
 import { fetchPost, fetchPosts, fetchPostChanges } from '@/lib/posts'
 import { postsKeys, tagsKeys, wikiKeys } from '@/lib/queryKeys'
-import { fetchTagByName, fetchTag, fetchTagChanges, fetchTags } from '@/lib/tags'
+import { fetchTagByName, fetchTag, fetchTags } from '@/lib/tags'
 import { fetchWikiPage,
 	 fetchWikiPageByTitle,
 	 fetchWikiPages } from '@/lib/wiki'
@@ -14,7 +14,6 @@ type Prefetcher = (qc: QueryClient, url: URL) => Promise<void>
 
 const mPost = match<{ id: string }> ('/posts/:id')
 const mWiki = match<{ title: string }> ('/wiki/:title')
-const mTag = match<{ id: string }> ('/tags/:id')
 
 
 const prefetchWikiPagesIndex: Prefetcher = async (qc, url) => {
@@ -170,30 +169,6 @@ const prefetchTagsIndex: Prefetcher = async (qc, url) => {
 }
 
 
-const prefetchTagShow: Prefetcher = async (qc, url) => {
-  const m = mTag (url.pathname)
-  if (!(m))
-    return
-
-  const { id } = m.params
-
-  await qc.prefetchQuery ({
-      queryKey: tagsKeys.show (id),
-      queryFn:  () => fetchTag (id) })
-}
-
-
-const prefetchTagChanges: Prefetcher = async (qc, url) => {
-  const id = url.searchParams.get ('id')
-  const page = Number (url.searchParams.get ('page') || 1)
-  const limit = Number (url.searchParams.get ('limit') || 20)
-
-  await qc.prefetchQuery ({
-      queryKey: tagsKeys.changes ({ ...(id && { id }), page, limit }),
-      queryFn: () => fetchTagChanges ({ ...(id && { id }), page, limit }) })
-}
-
-
 export const routePrefetchers: { test: (u: URL) => boolean; run: Prefetcher }[] = [
     { test: u => ['/', '/posts', '/posts/search'].includes (u.pathname),
       run: prefetchPostsIndex },
@@ -205,11 +180,7 @@ export const routePrefetchers: { test: (u: URL) => boolean; run: Prefetcher }[]
     { test: u => (!(['/wiki/new', '/wiki/changes'].includes (u.pathname))
 		  && Boolean (mWiki (u.pathname))),
       run: prefetchWikiPageShow },
-    { test: u => u.pathname === '/tags', run: prefetchTagsIndex },
+    { test: u => u.pathname === '/tags', run: prefetchTagsIndex }]
-    { test: u => (!(['/tags/nico', '/tags/changes'].includes (u.pathname))
-		  && Boolean (mTag (u.pathname))),
-      run: prefetchTagShow },
-    { test: u => u.pathname === '/tags/changes', run: prefetchTagChanges }]
 
 
 export const prefetchForURL = async (qc: QueryClient, urlLike: string): Promise<void> => {

frontend/src/lib/queryKeys.ts

@@ -9,11 +9,9 @@ export const postsKeys = {
 		  ['posts', 'changes', p] as const }
 
 export const tagsKeys = {
-    root:     ['tags'] as const,
+    root:   ['tags'] as const,
-    index:    (p: FetchTagsParams) => ['tags', 'index', p] as const,
+    index:  (p: FetchTagsParams) => ['tags', 'index', p] as const,
-    show:     (name: string) => ['tags', name] 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 { FetchTagsParams, Tag, TagVersion } from '@/types'
+import type { FetchTagsParams, Tag } from '@/types'
 
 
 export const fetchTags = async (
@@ -45,14 +45,3 @@ export const fetchTagByName = async (name: string): Promise<Tag | null> => {
     return null
   }
 }
-
-
-export const fetchTagChanges = async (
-    { id, page, limit }: {
-	id?:    string
-	page:   number
-	limit:  number },
-): Promise<{
-    versions: TagVersion[]
-    count:    number }> =>
-	await apiGet ('/tags/versions', { params: { ...(id && { id }), page, limit } })

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/tags/TagDetailPage.tsx

@@ -1,158 +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 { CATEGORIES, CATEGORY_NAMES } from '@/consts'
-import { apiPut } from '@/lib/api'
-import { postsKeys, tagsKeys } from '@/lib/queryKeys'
-import { fetchTag } from '@/lib/tags'
-import { cn } from '@/lib/utils'
-
-import type { FC, FormEvent } from 'react'
-
-import type { Category, Tag } from '@/types'
-
-
-export default (() => {
-  const { id } = useParams ()
-  const tagId = String (id ?? '')
-  const tagKey = tagsKeys.show (tagId)
-
-  const { data: tag, isLoading: loading } = useQuery ({
-      queryKey: tagKey,
-      queryFn: () => fetchTag (tagId) })
-
-  const [name, setName] = useState ('')
-  const [category, setCategory] = useState<Category> ('general')
-  const [aliases, setAliases] = useState ('')
-  const [parentTags, setParentTags] = useState ('')
-  const [disabled, setDisabled] = useState (true)
-
-  const qc = useQueryClient ()
-
-  const handleSubmit = async (e: FormEvent) => {
-    e.preventDefault ()
-
-    const formData = new FormData
-    formData.append ('name', name)
-    formData.append ('category', category)
-    formData.append ('aliases', aliases)
-    formData.append ('parent_tags', parentTags)
-
-    try
-    {
-      const data = await apiPut<Tag> (`/tags/${ id }`, formData)
-
-      setName (data.name)
-      setCategory (data.category as Category)
-      setAliases (data.aliases.join (' '))
-      setParentTags (data.parents.map (t => t.name).join (' '))
-
-      qc.invalidateQueries ({ queryKey: postsKeys.root })
-      qc.invalidateQueries ({ queryKey: tagsKeys.root })
-      toast ({ description: '更新しました．' })
-    }
-    catch
-    {
-      toast ({ description: '更新に失敗しました．' })
-    }
-  }
-
-  useEffect (() => {
-    if (!(tag))
-      {
-	setDisabled (true)
-	return
-      }
-
-    setName (tag.name)
-    setCategory (tag.category as Category)
-    setAliases (tag.aliases.join (' '))
-    setParentTags (tag.parents.map (t => t.name).join (' '))
-    setDisabled (tag.category === 'nico')
-  }, [tag])
-
-  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">
-		{/* 名称 */}
-		<div>
-		  <Label>名称</Label>
-		  {/* TODO: 補完に対応させる */}
-		  <input
-		      type="text"
-		      disabled={disabled}
-		      value={name}
-		      onChange={e => setName (e.target.value)}
-		      className="w-full border p-2 rounded"/>
-		</div>
-
-		{/* カテゴリ */}
-		<div>
-		  <Label>カテゴリ</Label>
-		  <select
-		      disabled={disabled}
-		      value={category ?? ''}
-		      onChange={e => setCategory(e.target.value as Category)}
-		      className="w-full border p-2 rounded">
-		    {CATEGORIES.filter (cat => tag.category === 'nico' || cat !== 'nico')
-			       .map (cat => (
-			<option key={cat} value={cat}>
-			  {CATEGORY_NAMES[cat]}
-			</option>))}
-		  </select>
-		</div>
-
-		{/* 別名 */}
-		<div>
-		  <Label>別名</Label>
-		  {/* TODO: 補完に対応させる */}
-		  <input
-		      type="text"
-		      disabled={disabled}
-		      value={aliases}
-		      onChange={e => setAliases (e.target.value)}
-		      className="w-full border p-2 rounded"/>
-		</div>
-
-		{/* 上位タグ */}
-		<div>
-		  <Label>上位タグ</Label>
-		  {/* TODO: 補完に対応させる */}
-		  <input
-		      type="text"
-		      disabled={disabled}
-		      value={parentTags}
-		      onChange={e => setParentTags (e.target.value)}
-		      className="w-full border p-2 rounded"/>
-		</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/tags/TagHistoryPage.tsx

@@ -1,212 +0,0 @@
-import { useQuery, useQueryClient } from '@tanstack/react-query'
-import { useEffect } from 'react'
-import { Helmet } from 'react-helmet-async'
-import { useLocation } from 'react-router-dom'
-
-import PrefetchLink from '@/components/PrefetchLink'
-import PageTitle from '@/components/common/PageTitle'
-import Pagination from '@/components/common/Pagination'
-import MainArea from '@/components/layout/MainArea'
-import { toast } from '@/components/ui/use-toast'
-import { SITE_TITLE } from '@/config'
-import { CATEGORY_NAMES } from '@/consts'
-import { apiPut } from '@/lib/api'
-import { postsKeys, tagsKeys } from '@/lib/queryKeys'
-import { fetchTagChanges } from '@/lib/tags'
-import { cn, dateString } from '@/lib/utils'
-
-import type { FC } from 'react'
-
-
-const renderDiff = (diff: { current: string | null; prev: string | null }) => (
-    <>
-      {(diff.prev && diff.prev !== diff.current) && (
-	  <>
-	    <del className="text-red-600 dark:text-red-400">
-	      {diff.prev}
-	    </del>
-	    {diff.current && <br/>}
-	  </>)}
-      {diff.current}
-    </>)
-
-
-export default (() => {
-  const location = useLocation ()
-  const query = new URLSearchParams (location.search)
-  const id = query.get ('id')
-  const page = Number (query.get ('page') ?? 1)
-  const limit = Number (query.get ('limit') ?? 20)
-
-  const { data, isLoading: loading } = useQuery ({
-      queryKey: tagsKeys.changes ({ ...(id && { id }), page, limit }),
-      queryFn:  () => fetchTagChanges ({ ...(id && { id }), page, limit }) })
-  const changes = data?.versions ?? []
-  const totalPages = data ? Math.ceil (data.count / limit) : 0
-
-  const qc = useQueryClient ()
-
-  useEffect (() => {
-    document.querySelector ('table')?.scrollIntoView ({ behavior: 'smooth' })
-  }, [location.search])
-
-  return (
-      <MainArea>
-	<Helmet>
-	  <title>{`タグ定義変更履歴 | ${ SITE_TITLE }`}</title>
-	</Helmet>
-
-	<PageTitle>
-	  タグ定義変更履歴
-	  {id && <>: タグ {<PrefetchLink to={`/tags/${ id }`}>#{id}</PrefetchLink>}</>}
-	</PageTitle>
-
-	{loading ? 'Loading...' : (
-	    <>
-	      <div className="overflow-x-auto">
-		<table className="w-full min-w-[1200px] table-fixed border-collapse">
-		  <colgroup>
-		    {/* 版 */}
-		    <col className="w-40"/>
-		    {/* 名称 */}
-		    <col className="w-96"/>
-		    {/* カテゴリ */}
-		    <col className="w-96"/>
-		    {/* 別名 */}
-		    <col className="w-[48rem]"/>
-		    {/* 上位タグ */}
-		    <col className="w-96"/>
-		    {/* 更新日時 */}
-		    <col className="w-64"/>
-		    {/* (差戻ボタン) */}
-		    <col className="w-20"/>
-		  </colgroup>
-
-		  <thead className="border-b-2 border-black dark:border-white">
-		    <tr>
-		      <th className="p-2 text-left">版</th>
-		      <th className="p-2 text-left">名称</th>
-		      <th className="p-2 text-left">カテゴリ</th>
-		      <th className="p-2 text-left">別名</th>
-		      <th className="p-2 text-left">上位タグ</th>
-		      <th className="p-2 text-left">更新日時</th>
-		      <th className="p-2"/>
-		    </tr>
-		  </thead>
-
-		  <tbody>
-		    {changes.map (change => (
-			<tr key={`${ change.tagId }.${ change.versionNo }`}
-			    className={cn ('even:bg-gray-100 dark:even:bg-gray-700')}>
-			  <td className="p-2">{change.tagId}.{change.versionNo}</td>
-			  <td className="p-2 break-all">{renderDiff (change.name)}</td>
-			  <td className="p-2 break-all">
-			    {renderDiff ({
-				current: CATEGORY_NAMES[change.category.current],
-				prev: (change.category.prev
-				       && CATEGORY_NAMES[change.category.prev]) })}
-			  </td>
-			  <td className="p-2">
-			    {change.aliases.map ((tag, i) => (
-				tag.type === 'added'
-				? (
-				    <ins
-					key={i}
-					className="mr-2 text-green-600 dark:text-green-400">
-				      {tag.name}
-				    </ins>)
-				: (
-				    tag.type === 'removed'
-				    ? (
-					<del
-					    key={i}
-					    className="mr-2 text-red-600 dark:text-red-400">
-					  {tag.name}
-					</del>)
-				    : (
-					<span key={i} className="mr-2">
-					  {tag.name}
-					</span>))))}
-			  </td>
-			  <td className="p-2">
-			    {change.parentTags.map ((tag, i) => (
-				tag.type === 'added'
-				? (
-				    <ins
-					key={i}
-					className="mr-2 text-green-600 dark:text-green-400">
-				      {tag.tag.name}
-				    </ins>)
-				: (
-				    tag.type === 'removed'
-				    ? (
-					<del
-					    key={i}
-					    className="mr-2 text-red-600 dark:text-red-400">
-					  {tag.tag.name}
-					</del>)
-				    : (
-					<span key={i} className="mr-2">
-					  {tag.tag.name}
-					</span>))))}
-			  </td>
-			  <td className="p-2">
-			    {change.createdByUser
-			     ? (
-				<PrefetchLink to={`/users/${ change.createdByUser.id }`}>
-				  {change.createdByUser.name
-				   || `名もなきニジラー（#${ change.createdByUser.id }）`}
-				</PrefetchLink>)
-			     : 'bot 操作'}
-			    <br/>
-			    {dateString (change.createdAt)}
-			  </td>
-			  <td className="p-2">
-			    <a
-				href="#"
-				onClick={async e => {
-				  e.preventDefault ()
-
-				  if (!(confirm (
-				      `タグ『${ change.name.current }』を版 ${
-				      change.versionNo } に差戻します．\nよろしいですか?`)))
-				    return
-
-				  try
-				  {
-				    await apiPut (
-					`/tags/${ change.tagId }`,
-					{ name: change.name.current,
-					  category: change.category.current,
-					  aliases:
-					      change.aliases
-					      .filter (t => t.type !== 'removed')
-					      .map (t => t.name)
-					      .join (' '),
-					  parent_tags:
-					      change.parentTags
-					      .filter (t => t.type !== 'removed')
-					      .map (t => t.tag.name)
-					      .join (' ') })
-
-				    qc.invalidateQueries ({ queryKey: postsKeys.root })
-				    qc.invalidateQueries ({ queryKey: tagsKeys.root })
-				    toast ({ description: '差戻しました．' })
-				  }
-				  catch
-				  {
-				    toast ({ description: '差戻に失敗……' })
-				  }
-				}}>
-			      復元
-			    </a>
-			  </td>
-			</tr>))}
-		  </tbody>
-		</table>
-	      </div>
-
-	      <Pagination page={page} totalPages={totalPages}/>
-	    </>)}
-      </MainArea>)
-}) satisfies FC

frontend/src/pages/tags/TagListPage.tsx

@@ -205,15 +205,13 @@ export default (() => {
 	{loading ? 'Loading...' : (results.length > 0 ? (
 	    <div className="mt-4">
 	      <div className="overflow-x-auto">
-		<table className="w-full min-w-[2000px] table-fixed border-collapse">
+		<table className="w-full min-w-[1200px] table-fixed border-collapse">
 		  <colgroup>
 		    <col className="w-72"/>
+		    <col className="w-48"/>
 		    <col className="w-16"/>
-		    <col className="w-48"/>
+		    <col className="w-44"/>
-		    <col className="w-72"/>
+		    <col className="w-44"/>
-		    <col className="w-48"/>
-		    <col className="w-56"/>
-		    <col className="w-56"/>
 		    <col className="w-16"/>
 		  </colgroup>
 
@@ -226,13 +224,6 @@ export default (() => {
 			    currentOrder={order}
 			    defaultDirection={defaultDirection}/>
 		      </th>
-		      <th className="p-2 text-left whitespace-nowrap">
-			<SortHeader<FetchTagsOrderField>
-			    by="post_count"
-			    label="件数"
-			    currentOrder={order}
-			    defaultDirection={defaultDirection}/>
-		      </th>
 		      <th className="p-2 text-left whitespace-nowrap">
 			<SortHeader<FetchTagsOrderField>
 			    by="category"
@@ -240,8 +231,13 @@ export default (() => {
 			    currentOrder={order}
 			    defaultDirection={defaultDirection}/>
 		      </th>
-		      <th className="p-2 text-left whitespace-nowrap">別名</th>
+		      <th className="p-2 text-left whitespace-nowrap">
-		      <th className="p-2 text-left whitespace-nowrap">上位タグ</th>
+			<SortHeader<FetchTagsOrderField>
+			    by="post_count"
+			    label="件数"
+			    currentOrder={order}
+			    defaultDirection={defaultDirection}/>
+		      </th>
 		      <th className="p-2 text-left whitespace-nowrap">
 			<SortHeader<FetchTagsOrderField>
 			    by="created_at"
@@ -264,23 +260,10 @@ export default (() => {
 		    {results.map (row => (
 			<tr key={row.id} className="even:bg-gray-100 dark:even:bg-gray-700">
 			  <td className="p-2">
-			    <TagLink
+			    <TagLink tag={row} withCount={false}/>
-				tag={row}
-				to={`/tags/${ encodeURIComponent (row.id) }`}
-				withCount={false}/>
 			  </td>
-			  <td className="p-2 text-right">{row.postCount}</td>
 			  <td className="p-2">{CATEGORY_NAMES[row.category]}</td>
-			  <td className="p-2">{row.aliases.join (' ')}</td>
+			  <td className="p-2 text-right">{row.postCount}</td>
-			  <td className="p-2">
-			    {row.parents.map (t => (
-				<span key={t.id} className="mr-2">
-				  <TagLink
-				      tag={t}
-				      withWiki={false}
-				      withCount={false}/>
-				</span>))}
-			  </td>
 			  <td className="p-2">{dateString (row.createdAt)}</td>
 			  <td className="p-2">{dateString (row.updatedAt)}</td>
 			  <td className="p-2">

frontend/src/pages/wiki/WikiDetailPage.tsx

@@ -114,15 +114,13 @@ export default () => {
 		     {...(version && { to: `/wiki/${ encodeURIComponent (title) }` })}/>
 	  </h1>
 	  {loading ? <div>Loading...</div> : <WikiBody title={title} body={wikiPage?.body}/>}
-
-	  {(!(version) && posts.length > 0) && (
-	      <div className="not-prose">
-		<TabGroup>
-		  <Tab name="広場">
-		    <PostList posts={posts}/>
-		  </Tab>
-		</TabGroup>
-	      </div>)}
 	</article>
+
+	{(!(version) && posts.length > 0) && (
+	    <TabGroup>
+	      <Tab name="広場">
+		<PostList posts={posts}/>
+	      </Tab>
+	    </TabGroup>)}
       </MainArea>)
 }

frontend/src/types.ts

@@ -121,9 +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
@@ -147,11 +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
+    tags:                   { name: string; type: 'context' | 'added' | 'removed' }[]
-			      type: 'context' | 'added' | 'removed' }[]
-    parentPosts:            { id: number
-			      title: string
-			      type: 'context' | 'added' | 'removed' }[]
     originalCreatedFrom:    { current: string | null; prev: string | null }
     originalCreatedBefore:  { current: string | null; prev: string | null }
     createdAt:              string
@@ -172,8 +165,6 @@ export type Tag = {
     id:             number
     name:           string
     category:       Category
-    aliases:        string[]
-    parents:        Tag[]
     postCount:      number
     createdAt:      string
     updatedAt:      string
@@ -182,17 +173,6 @@ export type Tag = {
     children?:      Tag[]
     matchedAlias?:  string | null }
 
-export type TagVersion = {
-    tagId:                  number
-    versionNo:              number
-    eventType:              'create' | 'update' | 'discard' | 'restore'
-    name:                   { current: string; prev: string | null }
-    category:               { current: Category; prev: Category | null }
-    aliases:                { name: string; type: 'context' | 'added' | 'removed' }[]
-    parentTags:             { tag: Tag; type: 'context' | 'added' | 'removed' }[]
-    createdAt:              string
-    createdByUser:          { id: number; name: string | null } | null }
-
 export type Theatre = {
     id:             number
     name:           string | null