Add comments'

app/models/article.rb

@@ -1,5 +1,5 @@
 class Article < ApplicationRecord
-  has_rich_text :text
+  has_many :comments, dependent: :destroy
   has_rich_text :content
   validates_presence_of :title
 end

app/models/comment.rb

@@ -0,0 +1,4 @@
+class Comment < ApplicationRecord
+  belongs_to :article
+  broadcasts_to :article
+end