Wiki 依存の排除 (#431) (#432)

Reviewed-on: #432
Co-authored-by: miteruzo <miteruzo@naver.com>

backend/app/models/user.rb

@@ -13,10 +13,10 @@ class User < ApplicationRecord
   has_many :ip_addresses, through: :user_ips
   has_many :user_post_views, dependent: :destroy
   has_many :viewed_posts, through: :user_post_views, source: :post
-  has_many :created_wiki_pages,
-           class_name: 'WikiPage', foreign_key: :created_user_id, dependent: :nullify
-  has_many :updated_wiki_pages,
-           class_name: 'WikiPage', foreign_key: :updated_user_id, dependent: :nullify
+  has_many :created_tag_descriptions, class_name: 'TagDescription',
+           foreign_key: :created_by_user_id, dependent: :nullify
+  has_many :updated_tag_descriptions, class_name: 'TagDescription',
+           foreign_key: :updated_by_user_id, dependent: :nullify
 
   def viewed?(post) = user_post_views.exists?(post_id: post.id)