Rails的模型和QUOT;的before_filter＆QUOT;？ [英] Rails model "before_filter"?

问题描述

我知道的before_filter是仅适用于Rails的控制器，但我想是这样的模式：任何时候在我的模型的方法被调用时，我想运行一个方法，决定调用的方法是否应该跑。从概念上讲，是这样的：

 类网站＆LT;的ActiveRecord :: Base的
  的before_filter：confirm_company

  高清confirm_company
    如果self.parent.thing ==假的？
      返回false
    结束
  结束

  DEF方法1
    #do东西
  结束

结束
 

所以，当我打电话@ website.method1，它会首先调用confirm_company，如果我返回false，将无法运行方法1。滑轨是否有这样的功能？我希望我只是错过了一些东西明显在这里...

解决方案

 类为MyModel
    延长加载ActiveModel ::回调
    define_model_callbacks：do_stuff

    before_do_stuff：确认

    高清do_stuff
        run_callbacks：do_stuff做
            #your code
        结束
    结束

    DEF确认
        ＃确认
    结束
结束
 

我真的不知道这会的工作，但你可以尝试一下，因为我真的没有时间了。看看是：<一href="http://api.rubyonrails.org/classes/ActiveModel/Callbacks.html">http://api.rubyonrails.org/classes/ActiveModel/Callbacks.html

I know that before_filter is only for controllers in Rails, but I would like something like this for a model: any time a method in my model is called, I'd like to run a method that determines whether the called method should run. Conceptually, something like this:

class Website < ActiveRecord::Base
  before_filter :confirm_company

  def confirm_company
    if self.parent.thing == false?
      return false
    end
  end

  def method1
    #do stuff
  end

end

So when I call @website.method1, it will first call confirm_company, and if I return false, will not run method1. Does Rails have functionality like this? I hope i'm just missing out on something obvious here...

解决方案

class MyModel
    extend ActiveModel::Callbacks
    define_model_callbacks :do_stuff

    before_do_stuff :confirm

    def do_stuff
        run_callbacks :do_stuff do
            #your code
        end
    end

    def confirm
        #confirm
    end
end

I'm really not sure this will work, but you can try it, as I really dont have time now. Take a look at that: http://api.rubyonrails.org/classes/ActiveModel/Callbacks.html

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