ruby-on-rails - 删除连接的对象

Question

我有一个用户类，其中has_many地址 - 和地址belongs_to用户。
我如何定义它，以便当一个地址被删除时它user.adresses也会被删除，反之亦然，如果我这样做user.addresses.delete(address)，那么它不再出现在Addresses.all？

Answer 1

To destroy addresses when a user is deleted, you can declare it on the association.

class User < ActiveRecord::Base
  has_many :addresses, :dependent => :destroy #destroy addresses when user destroyed
end

You don't need to do anything for the other way around, since the foreign key is on the Address model.

Answer 2

您需要在 User 模型的 has_many 关系中传递 :dependent => :destroy

has_many :addresses, :dependent => :destroy

如果您这样做，则如果删除了用户，则与该用户关联的所有地址对象也将被删除。