如何从Rails 3中的控制器调用模型方法？

Question

In my model I have something like: 在我的模型中，我有类似以下内容：

class CML < Lead
 def model_method
  #something
 end
end

and in my Controller: 在我的控制器中：

def recommend
    @var.model_method
    #more stuff
  end

and @var is a CML object, however I keep getting: @var是一个CML对象，但是我不断得到：

undefined method `model_method' for # ＃的未定义方法`model_method'

Does anyone knows why? 有谁知道为什么？

Thanks! 谢谢！

Answer 1

It seems @var is empty at that point 似乎@var在那时是空的

you should use something like (choose one): 您应该使用类似（选择一项）的方法：

@var = Var.find params[:id]
#or
@var = Var.new
#or
@var = Var.create

then you could call your 那你可以打电话给你

@var.model_method