AI: address issue #436

backend/app/controllers/material_versions_controller.rb

@@ -5,7 +5,6 @@ class MaterialVersionsController < ApplicationController
 
     page = 1 if page < 1
     limit = 1 if limit < 1
-    limit = 100 if limit > 100
 
     offset = (page - 1) * limit
 

backend/app/controllers/materials_controller.rb

@@ -14,7 +14,6 @@ class MaterialsController < ApplicationController
 
     page = 1 if page < 1
     limit = 1 if limit < 1
-    limit = 100 if limit > 100
 
     offset = (page - 1) * limit
 

backend/app/controllers/nico_tags_controller.rb

@@ -15,7 +15,6 @@ class NicoTagsController < ApplicationController
 
     page = 1 if page < 1
     limit = 1 if limit < 1
-    limit = 100 if limit > 100
 
     post_tag_max_sql =
         PostExternalTag

backend/app/controllers/post_versions_controller.rb

@@ -11,7 +11,6 @@ class PostVersionsController < ApplicationController
 
     page = 1 if page < 1
     limit = 1 if limit < 1
-    limit = 100 if limit > 100
 
     offset = (page - 1) * limit
 

backend/app/controllers/posts_controller.rb

@@ -34,7 +34,6 @@ class PostsController < ApplicationController
 
     page = 1 if page < 1
     limit = 1 if limit < 1
-    limit = 100 if limit > 100
 
     offset = (page - 1) * limit
 

backend/app/controllers/tag_versions_controller.rb

@@ -7,7 +7,6 @@ class TagVersionsController < ApplicationController
 
     page = 1 if page < 1
     limit = 1 if limit < 1
-    limit = 100 if limit > 100
 
     offset = (page - 1) * limit
 

backend/app/controllers/tags_controller.rb

@@ -33,7 +33,6 @@ class TagsController < ApplicationController
 
     page = 1 if page < 1
     limit = 1 if limit < 1
-    limit = 100 if limit > 100
 
     offset = (page - 1) * limit
 

backend/app/controllers/theatre_comments_controller.rb

@@ -2,7 +2,6 @@ class TheatreCommentsController < ApplicationController
   def index
     limit = params[:limit].to_i
     limit = 20 if limit <= 0
-    limit = 100 if limit > 100
 
     no_gt = params[:no_gt].to_i
     no_gt = 0 if no_gt < 0
@@ -10,7 +9,6 @@ class TheatreCommentsController < ApplicationController
     comments = TheatreComment
                .where(theatre_id: params[:theatre_id])
                .where('no > ?', no_gt)
-               .includes(:user)
                .order(no: :desc)
                .limit(limit)
 

backend/app/controllers/theatre_programmes_controller.rb

@@ -2,7 +2,6 @@ class TheatreProgrammesController < ApplicationController
   def index
     limit = params[:limit].to_i
     limit = 100 if limit <= 0
-    limit = 100 if limit > 100
 
     position_gt = params[:position_gt].to_i
     position_gt = 0 if position_gt < 0
@@ -11,7 +10,7 @@ class TheatreProgrammesController < ApplicationController
                  .where(theatre_id: params[:theatre_id])
                  .where('position > ?', position_gt)
                  .includes(:post)
-                 .order(position: :desc)
+                 .order(position: :desc).limit(100)
                  .limit(limit)
 
     render json: programmes.map { |programme|

backend/app/controllers/theatre_skip_events_controller.rb

@@ -2,7 +2,6 @@ class TheatreSkipEventsController < ApplicationController
   def index
     limit = params[:limit].to_i
     limit = 50 if limit <= 0
-    limit = 100 if limit > 100
 
     events =
         TheatreSkipEvent

backend/spec/requests/list_limits_spec.rb

@@ -1,174 +0,0 @@
-require 'rails_helper'
-
-RSpec.describe 'List API limits', type: :request do
-  shared_examples 'a capped list' do |default_count, minimum_count, paginated|
-    def response_rows
-      body = json
-      body.is_a?(Array) ? body : body.fetch(collection_key)
-    end
-
-    it 'caps oversized limits at 100 and preserves the 100 boundary' do
-      get path, params: { locale: 'ja', limit: 100 }
-      expect(response).to have_http_status(:ok)
-      expect(response_rows.size).to eq(100)
-      boundary_rows = response_rows
-
-      [101, 10_000].each do |limit|
-        get path, params: { locale: 'ja', limit: }
-        expect(response).to have_http_status(:ok)
-        expect(response_rows).to eq(boundary_rows)
-      end
-    end
-
-    it 'preserves the default, nonpositive and small positive limits' do
-      get path, params: { locale: 'ja' }
-      expect(response).to have_http_status(:ok)
-      expect(response_rows.size).to eq(default_count)
-
-      [0, -1].each do |limit|
-        get path, params: { locale: 'ja', limit: }
-        expect(response).to have_http_status(:ok)
-        expect(response_rows.size).to eq(minimum_count)
-      end
-
-      get path, params: { locale: 'ja', limit: 2 }
-      expect(response).to have_http_status(:ok)
-      expect(response_rows.size).to eq(2)
-    end
-
-    if paginated
-      it 'uses the capped limit for page offsets and preserves total count' do
-        get path, params: { locale: 'ja', limit: 100 }
-        first_page = response_rows
-        expect(response).to have_http_status(:ok)
-        expect(json.fetch('count')).to eq(101)
-
-        get path, params: { locale: 'ja', limit: 100, page: 2 }
-        expect(response).to have_http_status(:ok)
-        expect(response_rows.size).to eq(1)
-        second_page = response_rows
-        expect(first_page & second_page).to be_empty
-
-        get path, params: { locale: 'ja', limit: 101, page: 2 }
-        expect(response).to have_http_status(:ok)
-        expect(response_rows).to eq(second_page)
-        expect(json.fetch('count')).to eq(101)
-      end
-    end
-  end
-
-  context 'posts' do
-    let(:path) { '/posts' }
-    let(:collection_key) { 'posts' }
-    before { create_list(:post, 101) }
-
-    include_examples 'a capped list', 20, 1, true
-  end
-
-  context 'tags' do
-    let(:path) { '/tags' }
-    let(:collection_key) { 'tags' }
-    before { create_list(:tag, 101) }
-
-    include_examples 'a capped list', 20, 1, true
-  end
-
-  context 'nico tags' do
-    let(:path) { '/tags/nico' }
-    let(:collection_key) { 'tags' }
-    before { create_list(:external_tag, 101) }
-
-    include_examples 'a capped list', 20, 1, true
-  end
-
-  context 'materials' do
-    let(:path) { '/materials' }
-    let(:collection_key) { 'materials' }
-    before do
-      101.times { |index| Material.create!(url: "https://example.com/material-#{ index }") }
-    end
-
-    include_examples 'a capped list', 20, 1, true
-  end
-
-  context 'post versions' do
-    let(:path) { '/posts/versions' }
-    let(:collection_key) { 'versions' }
-    let(:post) { create(:post) }
-    before do
-      101.times do |index|
-        PostVersion.create!(post:, version_no: index + 1, event_type: 'update',
-                            url: post.url, tags: '', tags_json: [], parent_post_ids: '')
-      end
-    end
-
-    include_examples 'a capped list', 20, 1, true
-  end
-
-  context 'tag versions' do
-    let(:path) { '/tags/versions' }
-    let(:collection_key) { 'versions' }
-    let(:tag) { create(:tag) }
-    before do
-      101.times do |index|
-        TagVersion.create!(tag:, version_no: index + 1, event_type: 'update',
-                           name: 'limit tag', category: 'general', aliases: '',
-                           parent_tag_ids: '', names: {
-                               ja: { name: 'limit tag', script_code: 'Jpan',
-                                     auto_generated: false, aliases: [] } })
-      end
-    end
-
-    include_examples 'a capped list', 20, 1, true
-  end
-
-  context 'material versions' do
-    let(:path) { '/materials/versions' }
-    let(:collection_key) { 'versions' }
-    let(:material) { Material.create!(url: 'https://example.com/material') }
-    before do
-      101.times do |index|
-        MaterialVersion.create!(material:, version_no: index + 1,
-                                event_type: 'update', url: material.url)
-      end
-    end
-
-    include_examples 'a capped list', 20, 1, true
-  end
-
-  context 'theatre lists' do
-    let(:theatre) { create(:theatre) }
-    let(:post) { create(:post) }
-
-    context 'comments' do
-      let(:path) { "/theatres/#{ theatre.id }/comments" }
-      before { create_list(:theatre_comment, 101, theatre:, user: theatre.created_by_user) }
-
-      include_examples 'a capped list', 20, 20, false
-    end
-
-    context 'programmes' do
-      let(:path) { "/theatres/#{ theatre.id }/programmes" }
-      before do
-        101.times do |index|
-          TheatreProgramme.create!(theatre:, post:, position: index + 1)
-        end
-      end
-
-      include_examples 'a capped list', 100, 100, false
-    end
-
-    context 'skip events' do
-      let(:path) { "/theatres/#{ theatre.id }/skip_events" }
-      before do
-        101.times do |index|
-          TheatreSkipEvent.create!(theatre:, post:,
-                                   skipped_by_user: theatre.created_by_user,
-                                   created_at: Time.utc(2026, 1, 1) + index.seconds)
-        end
-      end
-
-      include_examples 'a capped list', 50, 50, false
-    end
-  end
-end

frontend/src/entry-server.tsx

@@ -1,6 +1,6 @@
 import { QueryClient, QueryClientProvider, dehydrate, skipToken } from '@tanstack/react-query'
 import { PassThrough } from 'node:stream'
-import { renderToPipeableStream } from 'react-dom/server'
+import { renderToPipeableStream, renderToStaticMarkup } from 'react-dom/server'
 import { HelmetProvider } from 'react-helmet-async'
 import { I18nextProvider } from 'react-i18next'
 import { createStaticHandler, createStaticRouter,
@@ -9,7 +9,7 @@ import { createStaticHandler, createStaticRouter,
 import { AppFrame, appRoutes, resolvePageRoute } from '@/App'
 import { apiGet, isApiError } from '@/lib/api'
 import { createUII18n } from '@/lib/i18n'
-import { fetchLocales, isLocaleCode, legacyLocalePath } from '@/lib/locales'
+import { fetchLocales, isLocaleCode, legacyLocalePath, switchLocalePath } from '@/lib/locales'
 import { localesKeys, sessionKeys } from '@/lib/queryKeys'
 import { withRenderContext } from '@/lib/renderContext.server'
 
@@ -171,8 +171,26 @@ export const render = async (
 	}))
       }
       const helmet = helmetContext.helmet!
+      const alternates = status === 200 && known != null
+	  ? await Promise.all (locales.locales.map (entry => entry.code)
+	      .filter (isLocaleCode)
+	      .filter (code => known.route.handle?.locale == null
+		  || known.route.handle.locale === code)
+	      .map (async targetLocale => {
+		const location = { pathname: url.pathname, search: url.search, hash: '' }
+		const path = targetLocale === locale
+		    ? url.pathname + url.search
+		    : (known.route.handle?.switchLocale != null
+		       ? await known.route.handle.switchLocale ({
+			   location, params: known.params, locale, targetLocale })
+		       : switchLocalePath (location, targetLocale))
+		return <link key={targetLocale} rel="alternate" hrefLang={targetLocale}
+		    href={new URL (path, origin).href}/>
+	      }))
+	  : []
       const head = [helmet.title, helmet.meta, helmet.link, helmet.style]
 	  .map (entry => entry.toString ()).join ('')
+	  + renderToStaticMarkup (<>{alternates}</>)
       const dehydrated = dehydrate (client, { shouldDehydrateQuery: query =>
 	  query.state.status !== 'pending'
 	  && query.meta?.clientOnly !== true