ruby-on-rails - Rails 4，如何回调自定义错误？

Question

下面是一些 sudo 代码：

异常.rb

module Exceptions
  class CriticalError < StandardError
    # Question: How do I attach a callback to this error? Whenever this error is raised, I also want it to ping_me() as a after callback
    def ping_me()
      ...
    end
  end
end

期望的结果：

raise Exceptions::CriticalError # after a callback to this error being raised, it will run the ping_me() method

问题：

我如何在rails中做到这一点？我看到了一种rescue_from方法，但我认为它只能在控制器内部使用

非常感谢！

Answer 1

好的，我想通了

module Exceptions
  class CriticalError < StandardError
    def initialize(error_message)
      ping_me()
      super(error_message)
    end

    def ping_me()
      ....
    end
  end
end


raise Exceptions::CriticalError.new("something went wrong!")