什么是Rails模型中的around_create回调的目的？ [英] What is purpose of around_create callback in Rails Model?

问题描述

何时是around_create回调代码执行，在什么情况下我们应该使用它？

when is around_create callback code executed, in what situations we should use it?

推荐答案

现在发现的答案： around_create 允许你基本上做一个 before_create 和 after_create 。您必须使用 yield 才能执行之间的保存。

Had this question, too, and have now found the answer: around_create allows you to basically do both a before_create and an after_create in one method. You have to use yield to execute the save in between.

class MyModel < ActiveRecord::Base
  around_create :my_callback_method

  private
    def my_call_back_method
      # do some "before_create" stuff here

      yield  # this makes the save happen

      # do some "after_create" stuff here
    end
end

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