多言語化の基盤作り (#55) (#421)

Reviewed-on: #421
Co-authored-by: miteruzo <miteruzo@naver.com>

backend/app/models/locale.rb

@@ -0,0 +1,27 @@
+class Locale < ApplicationRecord
+  after_create_commit :generate_tag_names!
+
+  belongs_to :language, foreign_key: :language_code, primary_key: :code
+  belongs_to :script, foreign_key: :script_code, primary_key: :code
+
+  enum :code, ja: 'ja', en: 'en', fr: 'fr'
+
+  def self.nipponese = Locale.find('ja')
+
+  private
+
+  def generate_tag_names!
+    ApplicationRecord.transaction do
+      tag_ids = TagName.where(language_code:, primary_flg: true).pluck(:tag_id)
+      Tag.where.not(id: tag_ids).find_each do
+        TagName.create!(tag_id: _1.id,
+                        language_code:,
+                        name: TagName.generate_name(self, _1, _1.tag_name('ja')),
+                        script_code:,
+                        primary_flg: true,
+                        auto_generated: true,
+                        canonical_id: nil)
+      end
+    end
+  end
+end