如何建立具有多个引用且在Rails中具有许多关联的记录

Question

I have 3 models named Article , User , Comment

class Article < ActiveRecord::Base
  has_many :comments
end

class User < ActiveRecord::Base
  has_many :comments
end

class Comment < ActiveRecord::Base
  belongs_to :user
  belongs_to :article
end

Now, if I want to build a comment for an article, I can use

@comment = @article.comments.build(comment_params)

This will add article_id to the comment object.

Now, if I want to add the user_id to object , I can add in the following way

@comment.user_id = current_user.id

But, if I want to auto populate user_id like article_id , how can I do?

Answer 1

There's no direct way of doing that

But I follow this way

@comment = @article.comments.build(comment_params.merge(user: current_user))