accepts_nested_attributes_for和after

问：

我有一个这样的模型

class Post < ApplicationRecord

  has_many :comments,
            after_add: :soil,
            after_remove: :soil,
            dependent: :destroy

  attr_accessor :soiled_associations

  accepts_nested_attributes_for :comments, allow_destroy: true

  def soil(record)
    self.soiled_associations = [record]
  end
end

当我在视图中添加一个新的对象时，它会将对象添加到我的属性中（顺便说一句，我试图命名一个自定义方法，该方法的作用类似于 Rails 的类，但用于关联）。commentpost.soiled_associationssoiled_associationsDirty

但是，当我删除视图中的注释时，不会向属性添加任何内容。post.soiled_associations

我做错了什么？我怀疑这与工作原理有关（也许绕过这些回调），但任何人都可以对此有所了解吗？accepts_nested_attributes_for

ruby-on-rails ruby 回调 accepts-nested-attributes-for

>> Post.new(comments_attributes: [{}]).soiled_associations
=> [#<Comment:0x00007f01e99a30c0 id: nil, post_id: nil>]

>> Post.create(comments_attributes: [{}]).soiled_associations
=> [#<Comment:0x00007f01e9a08fd8 id: 3, post_id: 2>]

>> post = Post.last
>> post.comments.destroy_all
>> post.soiled_associations
=> [#<Comment:0x00007f01e99867e0 id: 3, post_id: 2>]

>> Post.create(comments_attributes: [{}])
>> post = Post.last
>> post.update(comments_attributes: [{id: 4, _destroy: true}])
>> post.soiled_associations
=> [#<Comment:0x00007f01e99a5500 id: 4, post_id: 3>]

accepts_nested_attributes_for和after_remove

accepts_nested_attributes_for and after_remove

评论

评论