#46

backend/app/controllers/tags_controller.rb

@@ -1,7 +1,3 @@
-require 'net/http'
-require 'uri'
-
-
 class TagsController < ApplicationController
   def index
     post_id = params[:post]
@@ -186,8 +182,7 @@ class TagsController < ApplicationController
              .find_by(id: params[:id])
     return head :not_found unless tag
 
-    render json: { tag: TagRepr.base(tag),
-                   deerjikists: DeerjikistRepr.many(tag.deerjikists) }
+    render json: DeerjikistRepr.many(tag.deerjikists)
   end
 
   def deerjikists_by_name
@@ -199,31 +194,7 @@ class TagsController < ApplicationController
              .find_by(tag_names: { name: })
     return head :not_found unless tag
 
-    render json: { tag: TagRepr.base(tag),
-                   deerjikists: DeerjikistRepr.many(tag.deerjikists) }
-  end
-
-  def update_deerjikists
-    return head :unauthorized unless current_user
-    return head :forbidden unless current_user.gte_member?
-
-    tag = Tag.joins(:tag_name)
-             .includes(:tag_name, tag_name: :wiki_page)
-             .find_by(id: params[:id])
-    return head :not_found unless tag
-
-    ApplicationRecord.transaction do
-      tag.deerjikists = []
-      params[:_json].each do
-        platform = _1[:platform]
-        code = normalise_deerjikist_code(platform, _1[:code])
-        deerjikist = Deerjikist.find_or_initialize_by(platform:, code:)
-        deerjikist.tag = tag
-        deerjikist.save!
-      end
-    end
-
-    render json: DeerjikistRepr.many(tag.reload.deerjikists)
+    render json: DeerjikistRepr.many(tag.deerjikists)
   end
 
   def materials_by_name
@@ -420,21 +391,4 @@ class TagsController < ApplicationController
       TagImplication.create!(tag:, parent_tag:)
     end
   end
-
-  def normalise_deerjikist_code platform, code
-    return code if platform != 'youtube' || code[0] != '@'
-
-    url = "https://www.youtube.com/#{ code }"
-
-    html = Net::HTTP.get(URI(url))
-
-    canonical = html[
-        /<link rel="canonical" href="https:\/\/www\.youtube\.com\/channel\/(UC[a-zA-Z0-9_-]{22})"/,
-        1]
-    return canonical if canonical
-
-    html[/"channelId":"(UC[a-zA-Z0-9_-]{22})"/, 1] || html[/\bUC[a-zA-Z0-9_-]{22}\b/]
-  rescue
-    nil
-  end
 end

backend/app/models/tag.rb

@@ -79,14 +79,11 @@ class Tag < ApplicationRecord
 
   def material_id = materials.first&.id
 
-  def has_deerjikists = deerjikists.present?
-
   def self.tagme = find_or_create_by_tag_name!('タグ希望', category: :meta)
   def self.bot = find_or_create_by_tag_name!('bot操作', category: :meta)
   def self.no_deerjikist = find_or_create_by_tag_name!('ニジラー情報不詳', category: :meta)
   def self.video = find_or_create_by_tag_name!('動画', category: :meta)
   def self.niconico = find_or_create_by_tag_name!('ニコニコ', category: :meta)
-  def self.youtube = find_or_create_by_tag_name!('YouTube', category: :meta)
 
   def self.normalise_tags! tag_names, with_tagme: true,
                                       with_no_deerjikist: true,

backend/app/representations/tag_repr.rb

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

backend/app/services/youtube/api_client.rb

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

backend/app/services/youtube/sync.rb

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

backend/app/services/youtube/video_item.rb

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

backend/config/routes.rb

@@ -24,7 +24,6 @@ Rails.application.routes.draw do
       patch '', action: :update
 
       get :deerjikists
-      put :deerjikists, action: :update_deerjikists
     end
   end
 

backend/config/schedule.rb

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

backend/lib/tasks/sync_posts.rake

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

backend/spec/requests/tags_deerjikists_spec.rb

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

backend/spec/services/youtube/api_client_spec.rb

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

backend/spec/services/youtube/sync_spec.rb

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

backend/spec/services/youtube/video_item_spec.rb

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

backend/spec/tasks/post_sync_spec.rb

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

frontend/src/App.tsx

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

frontend/src/components/TagLink.tsx

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

frontend/src/consts.ts

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

frontend/src/lib/queryKeys.ts

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

frontend/src/lib/tags.ts

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

frontend/src/pages/deerjikists/DeerjikistDetailPage.tsx

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

frontend/src/types.ts

@@ -1,6 +1,5 @@
 import { CATEGORIES,
 	 FETCH_POSTS_ORDER_FIELDS,
-	 PLATFORMS,
 	 USER_ROLES,
 	 ViewFlagBehavior } from '@/consts'
 
@@ -8,8 +7,6 @@ import type { ReactNode } from 'react'
 
 export type Category = typeof CATEGORIES[number]
 
-export type Deerjikist = { platform: Platform; code: string }
-
 export type FetchPostsOrder = `${ FetchPostsOrderField }:${ 'asc' | 'desc' }`
 
 export type FetchPostsOrderField = typeof FETCH_POSTS_ORDER_FIELDS[number]
@@ -117,8 +114,6 @@ export type NiconicoViewerHandle = {
     showComments: () => void
     hideComments: () => void }
 
-export type Platform = typeof PLATFORMS[number]
-
 export type Post = {
     id:                     number
     url:                    string
@@ -183,8 +178,7 @@ export type Tag = {
     createdAt:      string
     updatedAt:      string
     hasWiki:        boolean
-    materialId:     number | null
-    hasDeerjikists: boolean
+    materialId:     number
     children?:      Tag[]
     matchedAlias?:  string | null }