ruby-on-rails - 如何找出用户名

Question

我有这个设置：

class User < ActiveRecord::Base
  has_many :posts, :dependent => :destroy  
  has_many :comments, :through => :posts
end

class Post < ActiveRecord::Base
  belongs_to :user
  has_many :comments
end

class Comment < ActiveRecord::Base
  belongs_to :post
end

如何获取发表评论的用户名？

Answer 1

您缺少 Comment-belongs-to-User 关联：

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

这样你就可以很容易地获取评论者：

@comment.user

Answer 2

您可以使用委托

class Comment < ActiveRecord::Base
  belongs_to :post

  delegate :user, to :post
end

然后在您的代码中您可以访问

@comment.user