Question

在我的单表继承模型中，我重写了基本模型中的inherited方法，以便所有后代模型都可以被基本模型的名称识别。以下代码用于为所有继承的类添加对model_name方法的覆盖。

  def self.inherited(child)
    child.instance_eval do
      def model_name
        BaesModelDefinition.model_name
      end
    end
  end

我注意到这在Rails 3.2.3中产生了弃用警告：

DEPRECATION WARNING: It looks like something (probably a gem/plugin) is overriding 
the ActiveRecord::Base.inherited method. It is important that this hook executes so 
that your models are set up correctly. A workaround has been added to stop this 
causing an error in 3.2, but future versions will simply not work if the hook is
overridden.

我可以使用另一种方法来修复model_name问题吗？

Answer 1

答案结果很简单。只需在覆盖方法中添加super即可。

  def self.inherited(child)
    child.instance_eval do
      def model_name
        BaesModelDefinition.model_name
      end
    end
    super
  end

使用STI model_name解决方法的弃用警告

1 个答案: