#55

backend/app/representations/deerjikist_repr.rb

@@ -7,7 +7,8 @@ module DeerjikistRepr
   module_function
 
   def base deerjikist
-    deerjikist.as_json(BASE)
+    deerjikist.as_json(BASE).merge(
+        tag: deerjikist.tag && TagRepr.base(deerjikist.tag, language_code: 'ja'))
   end
 
   def many deerjikists

backend/app/representations/material_repr.rb

@@ -14,6 +14,7 @@ module MaterialRepr
 
   def base material, host:
     material.as_json(BASE).merge(
+        tag: material.tag && TagRepr.base(material.tag, language_code: 'ja'),
         file: if material.file.attached?
                 Rails.application.routes.url_helpers.rails_storage_proxy_url(
                     material.file, host:)
@@ -80,7 +81,7 @@ module MaterialRepr
   end
 
   def thumbnail_fallback_text material
-    material.tag&.name || material.created_at&.strftime('%Y-%m-%d')
+    material.tag&.name('ja') || material.created_at&.strftime('%Y-%m-%d')
   end
 
   def thumbnail_fallback_kind material
@@ -102,7 +103,7 @@ module MaterialRepr
     return nil unless tag
 
     { id: tag.id,
-      name: tag.name,
+      name: tag.name('ja'),
       category: tag.category,
       deprecated_at: tag.deprecated_at }
   end

backend/app/representations/post_repr.rb

@@ -91,7 +91,7 @@ module PostRepr
         post
         .post_tags
         .reject { _1.tag.deprecated? }
-        .sort_by { _1.tag.name }
+        .sort_by { _1.tag.name('ja') }
         .map { |post_tag|
           TagRepr.inline(post_tag.tag).merge(
               'children' => [],

backend/app/representations/tag_repr.rb

@@ -3,18 +3,19 @@
 
 module TagRepr
   BASE = { only: [:id, :category, :post_count, :created_at, :updated_at, :deprecated_at],
-           methods: [:name, :has_wiki, :material_id, :has_deerjikists] }.freeze
+           methods: [:has_wiki, :material_id, :has_deerjikists] }.freeze
 
   module_function
 
-  def base tag
-    tag.as_json(BASE).merge(aliases: tag.snapshot_aliases,
-                            parents: tag.parents.map { _1.as_json(BASE) })
+  def base tag, language_code: 'ja'
+    tag.as_json(BASE).merge(name: tag.name(language_code),
+                            aliases: tag.snapshot_aliases(language_code),
+                            parents: tag.parents.map { inline(_1, language_code:) })
   end
 
-  def inline tag
-    tag.as_json(BASE).merge(aliases: [], parents: [])
+  def inline tag, language_code: 'ja'
+    tag.as_json(BASE).merge(name: tag.name(language_code), aliases: [], parents: [])
   end
 
-  def many(tags) = tags.map { |t| base(t) }
+  def many(tags, language_code: 'ja') = tags.map { |tag| base(tag, language_code:) }
 end