我有一个简单的POSTGrape端点，后台带有Wisper发布/订阅:moduleSomethingclassDoit这是实际计算发生的SomeSub:classSomeSubdefdo_calculations(payload){result:"42"}.to_jsonendendSomePub也很简单:classSomePubincludeWisper::Publisherdefcall(payload)broadcast(:do_calculations,payload)endend所以我需要的是在调用Grape的post:now端点时用JSON{result:"42"}响应.不