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Ruby on rails ActiveRecord 2级深度范围_Ruby On Rails_Database_Activerecord - Fatal编程技术网
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Ruby on rails ActiveRecord 2级深度范围

ruby-on-rails database activerecord

Ruby on rails ActiveRecord 2级深度范围,ruby-on-rails,database,activerecord,Ruby On Rails,Database,Activerecord,假设这篇文章有很多评论 注释属于用户 我想获得所有对此帖子有评论的用户您需要： has_many :comments has_many :users, :through => :comments

假设这篇文章有很多评论 注释属于用户

我想获得所有对此帖子有评论的用户

您需要：

 has_many :comments
 has_many :users, :through => :comments