feat: “ニジラー情報不詳” タグの自動付与（#106） (#196)

#106

#106 エラー対応

#106

Merge branch 'main' into '#106'

Merge branch 'main' into '#106'

Merge remote-tracking branch 'origin/main' into '#106'

#106 誤字

Merge remote-tracking branch 'origin/main' into '#106'

#106 ニジラー情報なし

Co-authored-by: miteruzo <miteruzo@naver.com>
Reviewed-on: #196

backend/app/models/tag.rb

@@ -76,6 +76,10 @@ class Tag < ApplicationRecord
     @bot ||= find_or_create_by_tag_name!('bot操作', category: :meta)
   end
 
+  def self.no_deerjikist
+    @no_deerjikist ||= find_or_create_by_tag_name!('ニジラー情報不詳', category: :meta)
+  end
+
   def self.video
     @video ||= find_or_create_by_tag_name!('動画', category: :meta)
   end
@@ -100,6 +104,7 @@ class Tag < ApplicationRecord
     end
 
     tags << Tag.tagme if with_tagme && tags.size < 10 && tags.none?(Tag.tagme)
+    tags << Tag.no_deerjikist if tags.all? { |t| t.category != 'deerjikist' }
     tags.uniq(&:id)
   end