#314

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/tags_controller.rb

@@ -374,9 +374,9 @@ class TagsController < ApplicationController
   end
 
   def update_parent_tags! tag, parent_names
-    parent_tags = Tag.normalise_tags!(parent_names, with_tagme: false,
+    parent_tags = Tag.normalise_tags(parent_names, with_tagme: false,
-                                                    with_no_deerjikist: false,
+                                                   with_no_deerjikist: false,
-                                                    deny_nico: true)
+                                                   deny_nico: true)
 
     old_parent_tags = tag.parents.to_a
 

backend/app/controllers/wiki_assets_controller.rb

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

backend/app/controllers/wiki_pages_controller.rb

@@ -109,7 +109,7 @@ class WikiPagesController < ApplicationController
     return head :unauthorized unless current_user
     return head :forbidden unless current_user.gte_member?
 
-    title = params[:title].to_s.strip
+    title = params[:title]&.strip
     body = params[:body].to_s
 
     return head :unprocessable_entity if title.blank? || body.blank?
@@ -143,14 +143,7 @@ class WikiPagesController < ApplicationController
       end
     end
 
-    message = params[:message].presence
+    head :ok
-    Wiki::Commit.content!(page:,
-                          body:,
-                          created_user: current_user,
-                          message:,
-                          base_revision_id:)
-
-    render json: WikiPageRepr.base(page).merge(body:)
   end
 
   def search

backend/app/models/ip_address.rb

@@ -1,14 +1,7 @@
 class IpAddress < ApplicationRecord
   validates :ip_address, presence: true, length: { maximum: 16 }
+  validates :banned, inclusion: { in: [true, false] }
 
   has_many :user_ips, dependent: :destroy
   has_many :users, through: :user_ips
-
-  def banned? = banned_at?
-  def banned = banned?
-
-  def banned= value
-    bool = ActiveModel::Type::Boolean.new.cast(value)
-    self.banned_at = bool ? banned_at || Time.current : nil
-  end
 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/post_version.rb

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

backend/app/models/tag.rb

@@ -86,9 +86,9 @@ class Tag < ApplicationRecord
   def self.niconico = find_or_create_by_tag_name!('ニコニコ', category: :meta)
   def self.youtube = find_or_create_by_tag_name!('YouTube', category: :meta)
 
-  def self.normalise_tags! tag_names, with_tagme: true,
+  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/user.rb

@@ -4,6 +4,7 @@ class User < ApplicationRecord
   validates :name, length: { maximum: 255 }
   validates :inheritance_code, presence: true, length: { maximum: 64 }
   validates :role, presence: true, inclusion: { in: roles.keys }
+  validates :banned, inclusion: { in: [true, false] }
 
   has_many :created_posts,
            class_name: 'Post', foreign_key: :uploaded_user_id, dependent: :nullify
@@ -17,14 +18,6 @@ class User < ApplicationRecord
   has_many :updated_wiki_pages,
            class_name: 'WikiPage', foreign_key: :updated_user_id, dependent: :nullify
 
-  def banned? = banned_at?
-  def banned = banned?
-
-  def banned= value
-    bool = ActiveModel::Type::Boolean.new.cast(value)
-    self.banned_at = bool ? (banned_at || Time.current) : nil
-  end
-
   def viewed?(post) = user_post_views.exists?(post_id: post.id)
   def gte_member? = member? || admin?
 end

backend/app/models/wiki_asset.rb

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

backend/app/models/wiki_page.rb

@@ -13,8 +13,6 @@ class WikiPage < ApplicationRecord
            foreign_key: :redirect_page_id,
            dependent: :nullify
 
-  has_many :assets, class_name: 'WikiAsset', dependent: :destroy
-
   has_many :wiki_versions
 
   belongs_to :tag_name

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/wiki_asset_repr.rb

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

backend/app/services/post_version_recorder.rb

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

backend/config/routes.rb

@@ -47,8 +47,6 @@ Rails.application.routes.draw do
       get :exists
       get :diff
     end
-
-    resources :assets, controller: :wiki_assets, only: [:index, :create]
   end
 
   resources :posts, only: [:index, :show, :create, :update] do

backend/db/migrate/20260323192300_create_wiki_assets.rb

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

backend/db/migrate/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_05_01_153900) do
+ActiveRecord::Schema[8.0].define(version: 2026_04_26_120600) do
   create_table "active_storage_attachments", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.string "name", null: false
     t.string "record_type", null: false
@@ -50,10 +50,9 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_01_153900) do
 
   create_table "ip_addresses", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.binary "ip_address", limit: 16, null: false
-    t.datetime "banned_at"
+    t.boolean "banned", default: false, null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
-    t.index ["banned_at"], name: "index_ip_addresses_on_banned_at"
     t.index ["ip_address"], name: "index_ip_addresses_on_ip_address", unique: true
   end
 
@@ -120,15 +119,6 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_01_153900) do
     t.check_constraint "`version_no` > 0", name: "nico_tag_versions_version_no_positive"
   end
 
-  create_table "post_implications", primary_key: ["post_id", "parent_post_id"], charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
-    t.bigint "post_id", null: false
-    t.bigint "parent_post_id", null: false
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
-    t.index ["parent_post_id"], name: "index_post_implications_on_parent_post_id"
-    t.check_constraint "`post_id` <> `parent_post_id`", name: "chk_post_implications_no_self"
-  end
-
   create_table "post_similarities", primary_key: ["post_id", "target_post_id"], charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.bigint "post_id", null: false
     t.bigint "target_post_id", null: false
@@ -165,12 +155,13 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_01_153900) do
     t.string "url", limit: 768, null: false
     t.string "thumbnail_base", limit: 2000
     t.text "tags", null: false
-    t.text "parent_post_ids", null: false
+    t.bigint "parent_id"
     t.datetime "original_created_from"
     t.datetime "original_created_before"
     t.datetime "created_at", null: false
     t.bigint "created_by_user_id"
     t.index ["created_by_user_id"], name: "index_post_versions_on_created_by_user_id"
+    t.index ["parent_id"], name: "index_post_versions_on_parent_id"
     t.index ["post_id", "version_no"], name: "index_post_versions_on_post_id_and_version_no", unique: true
     t.index ["post_id"], name: "index_post_versions_on_post_id"
     t.check_constraint "`event_type` in (_utf8mb4'create',_utf8mb4'update',_utf8mb4'discard',_utf8mb4'restore')", name: "post_versions_event_type_valid"
@@ -181,11 +172,13 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_01_153900) do
     t.string "title"
     t.string "url", limit: 768, null: false
     t.string "thumbnail_base", limit: 2000
+    t.bigint "parent_id"
     t.bigint "uploaded_user_id"
     t.datetime "created_at", null: false
     t.datetime "original_created_from"
     t.datetime "original_created_before"
     t.datetime "updated_at", null: false
+    t.index ["parent_id"], name: "index_posts_on_parent_id"
     t.index ["uploaded_user_id"], name: "index_posts_on_uploaded_user_id"
     t.index ["url"], name: "index_posts_on_url", unique: true
   end
@@ -333,10 +326,9 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_01_153900) do
     t.string "name"
     t.string "inheritance_code", limit: 64, null: false
     t.string "role", null: false
-    t.datetime "banned_at"
+    t.boolean "banned", default: false, null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
-    t.index ["banned_at"], name: "index_users_on_banned_at"
   end
 
   create_table "wiki_assets", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
@@ -436,8 +428,6 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_01_153900) do
   add_foreign_key "nico_tag_relations", "tags", column: "nico_tag_id"
   add_foreign_key "nico_tag_versions", "tags"
   add_foreign_key "nico_tag_versions", "users", column: "created_by_user_id"
-  add_foreign_key "post_implications", "posts"
-  add_foreign_key "post_implications", "posts", column: "parent_post_id"
   add_foreign_key "post_similarities", "posts"
   add_foreign_key "post_similarities", "posts", column: "target_post_id"
   add_foreign_key "post_tags", "posts"
@@ -445,7 +435,9 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_01_153900) do
   add_foreign_key "post_tags", "users", column: "created_user_id"
   add_foreign_key "post_tags", "users", column: "deleted_user_id"
   add_foreign_key "post_versions", "posts"
+  add_foreign_key "post_versions", "posts", column: "parent_id"
   add_foreign_key "post_versions", "users", column: "created_by_user_id"
+  add_foreign_key "posts", "posts", column: "parent_id"
   add_foreign_key "posts", "users", column: "uploaded_user_id"
   add_foreign_key "settings", "users"
   add_foreign_key "tag_implications", "tags"

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

@@ -161,7 +161,7 @@ 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
 
@@ -1418,6 +1024,7 @@ RSpec.describe 'Posts API', type: :request do
         url: post.url,
         thumbnail_base: post.thumbnail_base,
         tags: snapshot_tags(post),
+        parent: post.parent,
         original_created_from: post.original_created_from,
         original_created_before: post.original_created_before,
         created_at: post.created_at,
@@ -1429,11 +1036,12 @@ RSpec.describe 'Posts API', type: :request do
       sign_in_as(member)
 
       expect do
-        post '/posts', params: post_write_params(
+        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)
@@ -1456,9 +1064,10 @@ RSpec.describe 'Posts API', type: :request do
       Tag.create!(tag_name: tag_name2, category: :general)
 
       expect do
-        put "/posts/#{post_record.id}", params: post_write_params(
+        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)
@@ -1478,9 +1087,10 @@ RSpec.describe 'Posts API', type: :request do
       create_post_version_for!(post_record.reload)
 
       expect {
-        put "/posts/#{post_record.id}", params: post_write_params(
+        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)
 
@@ -1494,11 +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)
@@ -1509,11 +1120,12 @@ RSpec.describe 'Posts API', type: :request do
       create_post_version_for!(post_record)
 
       expect do
-        put "/posts/#{post_record.id}", params: post_write_params(
+        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)
@@ -1527,11 +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)
@@ -1551,9 +1164,10 @@ RSpec.describe 'Posts API', type: :request do
       tag2 = Tag.create!(tag_name: tag_name2, category: :general)
 
       expect {
-        put "/posts/#{post_record.id}", params: post_write_params(
+        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/wiki_assets_spec.rb

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

backend/spec/requests/wiki_spec.rb

@@ -113,7 +113,6 @@ RSpec.describe 'Wiki API', type: :request do
 
         page_id = json.fetch('id')
         expect(json.fetch('title')).to eq('TestPage')
-        expect(json.fetch('body')).to eq("a\nb\nc")
 
         created_page = WikiPage.find(page_id)
         version = created_page.wiki_versions.order(:version_no).last

backend/spec/support/test_records.rb

@@ -3,13 +3,13 @@ module TestRecords
     User.create!(name: 'spec user',
                  inheritance_code: SecureRandom.hex(16),
                  role: 'member',
-                 banned_at: nil)
+                 banned: false)
   end
 
   def create_admin_user!
     User.create!(name: 'spec admin',
                  inheritance_code: SecureRandom.hex(16),
                  role: 'admin',
-                 banned_at: nil)
+                 banned: false)
   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/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/WikiBody.tsx

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

frontend/src/components/WikiEditForm.tsx

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

frontend/src/components/WikiMarkdown.tsx

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

frontend/src/pages/posts/PostDetailPage.tsx

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

frontend/src/pages/posts/PostHistoryPage.tsx

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

frontend/src/pages/posts/PostNewPage.tsx

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

frontend/src/pages/wiki/WikiEditPage.tsx

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

frontend/src/pages/wiki/WikiNewPage.tsx

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

frontend/src/types.ts

@@ -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
@@ -217,11 +210,6 @@ export type User = {
 
 export type ViewFlagBehavior = typeof ViewFlagBehavior[keyof typeof ViewFlagBehavior]
 
-export type WikiAsset = {
-    wikiPageId: number
-    no:         number
-    url:        string }
-
 export type WikiPage = {
     id:             number
     title:          string