Rails包含嵌套关系 [英] Rails includes nested relations

问题描述

我需要查询所有文章从一个特定的用户，包括所有的意见和谁属于注释的用户。

I need to query all posts from a specific user and include all comments and the user who belongs to the comment.

class User < ...
  has_many :posts
  has_many :comments
end

class Post < ...
  belongs_to :user
  has_many :comments
end

class Comment < ...
  belongs_to :user
  belongs_to :post
end

@posts = current_user.posts.include(:comments)

时可能也得到了用户的意见？我列出了许多文章和评论的。我不想查询每条评论的用户。

Is is possible to also get the comment user? I list a lot of posts and comments. I do not want to query each comment user.

THX /托比亚斯

推荐答案

尝试

@posts = current_user.posts.includes( :comments => :user)

了解更多关于它<一个href="http://guides.rubyonrails.org/active_record_querying.html#eager-loading-multiple-associations">here

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