#55

backend/app/models/tag.rb

@@ -51,12 +51,9 @@ class Tag < ApplicationRecord
   has_many :tag_versions
 
   has_many :tag_names
-  delegate :wiki_page, to: :tag_name
 
   attribute :version_no, :integer, default: 1
 
-  validates :tag_name, presence: true
-
   enum :category, deerjikist:  'deerjikist',
                   meme:        'meme',
                   character:   'character',
@@ -66,8 +63,6 @@ class Tag < ApplicationRecord
 
   validates :category, presence: true, inclusion: { in: Tag.categories.keys }
 
-  validate :tag_name_mustnt_start_with_nico
-  validate :tag_name_must_be_canonical
   validate :category_must_be_deerjikist_with_deerjikists
 
   CATEGORY_PREFIXES = {
@@ -84,6 +79,7 @@ class Tag < ApplicationRecord
 
   def tag_name(language_code) = tag_names.find_by(language_code:, primary_flg: true)
   def name(language_code) = tag_name(language_code)&.name
+  def wiki_page = WikiPage.find_by(tag_name_id: id)
 
   def deprecated? = deprecated_at?
 
@@ -234,7 +230,7 @@ class Tag < ApplicationRecord
     tag = tn.tag
     return tag if tag
 
-    tag = Tag.create!(tag_name: tn, category:)
+    tag = Tag.create!(tag_name_id: tn.id, category:)
     tn.update!(tag:)
 
     tag
@@ -295,28 +291,20 @@ class Tag < ApplicationRecord
     target_tag.reload
   end
 
-  def snapshot_aliases = tag_name.aliases.order(:name).pluck(:name)
+  def snapshot_aliases(language_code) = tag_name(language_code).aliases.order(:name).pluck(:name)
 
   def snapshot_parent_tag_ids = parents.order(:id).pluck(:id)
 
-  def snapshot_linked_tag_names
-    linked_tags.joins(:tag_name).order('tag_names.name').pluck('tag_names.name')
+  def snapshot_linked_tag_names language_code
+    linked_tags
+        .joins(:tag_names)
+        .where(tag_names: { language_code:, primary_flg: true })
+        .order('tag_names.name')
+        .pluck('tag_names.name')
   end
 
   private
 
-  def tag_name_mustnt_start_with_nico
-    if name.to_s.downcase.start_with?('nico:')
-      errors.add :name, 'タグの命名規則に反してゐます．'
-    end
-  end
-
-  def tag_name_must_be_canonical
-    if tag_name&.canonical_id?
-      errors.add :tag_name, 'tag_names へは実体を示す必要があります．'
-    end
-  end
-
   def category_must_be_deerjikist_with_deerjikists
     if !(deerjikist?) && deerjikists.exists?
       errors.add :category, 'ニジラーと紐づいてゐるタグはニジラー・カテゴリである必要があります．'

backend/app/models/tag_name.rb

@@ -10,6 +10,7 @@ class TagName < ApplicationRecord
   validate :alias_name_must_not_have_prefix
   validate :alias_must_not_have_wiki_page
   validate :name_must_be_sanitised
+  validate :name_mustnt_start_with_nico
 
   def primary? = primary_flg
 
@@ -58,4 +59,10 @@ class TagName < ApplicationRecord
       errors.add :name, '名前に使用できない文字が含まれてゐます．'
     end
   end
+
+  def name_mustnt_start_with_nico
+    if name.to_s.downcase.start_with?('nico:')
+      errors.add :name, 'タグの命名規則に反してゐます．'
+    end
+  end
 end