#428

backend/app/controllers/wiki_pages_controller.rb

@@ -37,27 +37,18 @@ class WikiPagesController < ApplicationController
   def autolink_candidates
     locale = resolve_locale!
     language = params.fetch(:language, locale.language_code)
+    language = 'ja' if language == 'und'
     return head :not_found unless language.is_a?(String)
-    target_locale =
-        if language == 'und'
-          locale
-        else
-          Locale.where(language_code: language, deprecated_at: nil,
-                       code: Locale.codes.values).order(:code).first
-        end
-    return head :not_found unless target_locale
+    return head :not_found unless Language.exists?(code: language)
 
-    candidates = []
-    unless language == 'und'
-      names = TagDescription.joins(tag: :tag_names)
-          .where(language_code: language, tag_names: { language_code: language })
-          .pluck('tag_descriptions.tag_id', 'tag_descriptions.id', 'tag_names.name')
-      candidates = names.map do |tag_id, description_id, name|
-        WikiPageRepr.autolink_tag(target_locale, tag_id:, description_id:, name:)
-      end
+    names = TagDescription.joins(tag: :tag_names)
+        .where(language_code: locale.language_code, tag_names: { language_code: language })
+        .pluck('tag_descriptions.tag_id', 'tag_descriptions.id', 'tag_names.name')
+    candidates = names.map do |tag_id, description_id, name|
+      WikiPageRepr.autolink_tag(locale, tag_id:, description_id:, name:, language:)
     end
     candidates.concat(TagGroup.order(:id).pluck(:id, :name).map do |id, name|
-      WikiPageRepr.autolink_group(target_locale, id:, name:, language:)
+      WikiPageRepr.autolink_group(locale, id:, name:, language:)
     end)
     render json: candidates
   end