ActiveModel::Callbacks

Active Model Callbacks

Provides an interface for any class to have Active Record like callbacks.

Like the Active Record methods, the callback chain is aborted as soon as one of the methods in the chain returns false.

First, extend ActiveModel::Callbacks from the class you are creating:

class MyModel
  extend ActiveModel::Callbacks
end

Then define a list of methods that you want callbacks attached to:

define_model_callbacks :create, :
登录查看完整内容