ruby-on-rails - 如何知道模型何时被 :dependent => :destroy in rails? 自动销毁

Question

我有以下关联:

class Parent < ActiveRecord::Base
  has_many :children, :dependent => :destroy
  before_destroy :do_some_stuff
end

class Child < ActiveRecord::Base
  belongs_to :parent
  before_destroy :do_other_stuff
end

我想在 do_other_stuff 中知道销毁是否已被依赖 => 销毁，因为它的一部分将/将在 do_some_stuff 中完成

我试过 parent.destroyed? , parent.marked_for_destruction? , parent.frozen?但没有任何效果:/

有任何想法吗？

Answer 1

您可以使用关联回调( before_remove 或 after_remove )

class Parent < ActiveRecord::Base
  has_many :children, :dependent => :destroy, :before_remove => :do_foo

  before_destroy :do_bar

  def do_bar
  end

  def do_foo
  end
end