如何在模型中调用 ApplicationController 中定义的方法 [英] How to call methods defined in ApplicationController in models

问题描述

我在 ApplicationController 中定义了方法

I have defined method in ApplicationController

class ApplicationController < ActionController::Base
   helper_method :get_active_gateway
   def get_active_gateway(cart)
     cart.account.gateways
   end
end

当我在模型中调用这个方法时

When I am calling this method in model

class Order < ActiveRecord::Base
   def transfer
     active= get_active_gateway(self.cart)
   end
end

它抛出错误未定义的局部变量get_active_gateway.

所以我写了

class Order < ActiveRecord::Base
   def transfer
    active= ApplicationContoller.helpers.get_active_gateway(self.cart)
   end
end

然后它抛出error undefined method nil for Nilclass.

我在 Rails 3.2.0 中工作.

I am working in Rails 3.2.0.

推荐答案

你为什么需要这样的东西?模型不应该知道它的控制器.在这种情况下，重新设计系统可能更合适.

Why would you need such thing? The model should not know about its controllers. Maybe a redesign of your system will be more appropriate in this case.

这里是类似线程的链接.

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