Redux-Saga 无法正确读取来自 fetch 的响应 api

Question

嗨，我如何读取从获取调用返回的数据：

export function* fetchMessages(channel) {     
    yield put(requestMessages())
    const channel_name = channel.payload
    try {      
        const response = yield call(fetch,'/api/messages/'+channel_name)

        const res = response.json()
            console.log(res)
        yield put(receiveMessages(res,channel))


   } catch (error){      
       yield put(rejectMessages(error))
   }      
}

当我 console.log(res) 我得到：

Promise {[[PromiseStatus]]: "pending", [[PromiseValue]]: undefined}
__proto__
:
Promise
[[PromiseStatus]]
:
"resolved"
[[PromiseValue]]
:
Array[7]

我如何从这个承诺中得到我的"info"（边数组[7]？我是新手。谢谢

Answer 1

response.json() 是异步的并且 returns promise

改变这个

const res = response.json()

至

const res = yield response.json()

webpackbin 例子

Redux-Saga 无法正确读取来自 fetch 的响应 api

Redux-Saga not able to correctly read response from fetch api

javascript

saga

es6-promise

redux

redux-saga