#47

backend/app/models/wiki_asset.rb

@@ -0,0 +1,10 @@
+class WikiAsset < ApplicationRecord
+  self.primary_key = :wiki_page_id, :no
+
+  belongs_to :wiki_page
+  belongs_to :created_by_user, class_name: 'User'
+
+  has_one_attached :file
+
+  validates :file, presence: true
+end

backend/app/models/wiki_page.rb

@@ -15,6 +15,8 @@ class WikiPage < ApplicationRecord
            foreign_key: :redirect_page_id,
            dependent: :nullify
 
+  has_many :assets, class_name: 'WikiAsset', dependent: :destroy
+
   belongs_to :tag_name
   validates :tag_name, presence: true