Ruby on rails 销毁前的Rails 4不能防止销毁_Ruby On Rails_Ruby On Rails 4

Ruby on rails 销毁前的Rails 4不能防止销毁

ruby-on-rails ruby-on-rails-4

Ruby on rails 销毁前的Rails 4不能防止销毁,ruby-on-rails,ruby-on-rails-4,Ruby On Rails,Ruby On Rails 4,这里是我设置的一个简单的消息模型 class Message < ActiveRecord::Base validates_presence_of :user_id, :head, :text belongs_to :user has_many :receivers, class_name: MessageReceiver has_many :users, through: :receivers before_destroy :check_receivers

这里是我设置的一个简单的消息模型

class Message < ActiveRecord::Base

  validates_presence_of :user_id, :head, :text

  belongs_to :user

  has_many :receivers, class_name: MessageReceiver
  has_many :users, through: :receivers

  before_destroy :check_receivers

  private

  def check_receivers
    if self.receivers.empty?
      true
    else
      self.update(deleted: 1)
      false
    end
  end

end

class消息


直接调用时，：check_receivers
方法按预期工作（我将其从资源的私有部分中删除），但不知何故，它并不能防止消息被破坏
我在这里做错什么了吗？
删除
before_destroy :check_receivers

试一试
has_many :receivers, class_name: MessageReceiver, dependent: :restrict_with_exception

它们是被销毁还是被删除<代码>销毁前

仅在

销毁

时触发。如果调用了

delete

，它将始终继续。