相关=＆GT;摧毁一个＆QUOT;通过的has_many＆QUOT;协会 [英] dependent => destroy on a "has_many through" association

问题描述

显然取决于=>破坏时也使用被忽略：通过选项

Apparently dependent => destroy is ignored when also using the :through option.

所以我有这个...

class Comment < ActiveRecord::Base
  has_many :comment_users, :dependent => :destroy
  has_many :users, :through => :comment_users
  ...
end

...但删除评论不会导致相关comment_user记录越来越删除。

...but deleting a Comment does not result in the associated comment_user records getting deleted.

什么是推荐的方法，那么，在使用的级联删除：通过

What's the recommended approach, then, for cascade deletes when using :through?

感谢

推荐答案

显然：依赖也是不可忽视的。

Apparently :dependent is not ignored!

真正的问题是，我是叫 Comment.delete（ID）肚里直奔分贝，而我现在用 Comment.destroy （ID）用来加载评论对象，并调用destroy（）方法就可以了。这拿起：依赖=＆GT; ：摧毁，一切都很好

The real issue was that I was calling Comment.delete(id) which goes straight to the db, whereas I now use Comment.destroy(id) which loads the Comment object and calls destroy() on it. This picks up the :dependent => :destroy and all is well.

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