delayed_callbacks.rb

module DelayedCallbacks
  def self.included(base)
    methods = base.instance_methods(false) + base.private_instance_methods(false)

    [:save, :update, :create].each do |time|
      if methods.include?("after_#{time}_job".to_sym)
        klass = Object.const_get("GenericAfter#{time.capitalize}Worker")
        performer = -> { klass.perform_async(self.id, self.class) }
        base.send(:define_method, "delay_after_#{time}".to_sym, performer)
        base.send("after_#{time}".to_sym, "delay_after_#{time}".to_sym)
      end
    end
  end
end