Question

我不断收到GCP的错误，我正在使用数据存储区＆amp;在GAE上部署。任何人有任何想法为什么我使用JavaScript承诺收到此错误？

我正在谷歌主页上使用谷歌操作，如果设备尚未注册到数据存储区中的公寓号，请询问激活密钥短语。如果未注册，则会要求提供将唯一设备ID与公寓号相关联的关键短语。如果唯一ID具有与之关联的公寓，则询问它可以提供哪些帮助。

我不确定为什么说关键路径不完整。 我也是承诺的新手！所以非常感谢任何帮助

UnhandledPromiseRejectionWarning：未处理的承诺拒绝（拒绝ID：99）：错误：密钥路径元素不得不完整：[激活：]

使用此代码？

datastore.get(datastore.key([ACTIVATION, device_id]))
.then(results => {
    let activation = null
    if (results[0] ) {
        activation = results[0]
    }
    return Promise.resolve(activation)
})
.then(activation => {
    console.log(activation)

    let actionMap = new Map();

    actionMap.set('input.welcome', assistant => {
        console.log('input.welcome')
        if (!activation) {
            assistant.ask("Hello! May I have your key phrase?")
        } 
        else {assistant.ask("Welcome back, what can I do for you today?")
        }
    })

    actionMap.set('input.unknown', assistant => {
        console.log('input.unknown')
        if (!activation) {
            assistant.ask("Please provide your activation code")
        } else
        {
            let speech = "OK"
            if (request.body &&
                request.body.result &&
                request.body.result.fulfillment &&
                request.body.result.fulfillment.messages &&
                request.body.result.fulfillment.messages[0] &&
                request.body.result.fulfillment.messages[0].speech) {
                    speech = request.body.result.fulfillment.messages[0].speech
                }
            sendSMSFromUnit(activation.number, request.body.result.resolvedQuery)

            assistant.tell("Got it. ")
        }
})

    actionMap.set('input.keyphrase', assistant => {
        let activationCode = TitleCase([
            assistant.getArgument('Token1'),
            assistant.getArgument('Token2'),
            assistant.getArgument('Token3')
        ].join(" "))
        console.log('activationCode: ' + activationCode)
        if (activation && activation.keyphrase == activationCode) {
            assistant.tell('This device is activated.')
            return
        }

        datastore.get(datastore.key([APARTMENT, activationCode]))
        .then(results => {
            console.log(results)
            if (!results[0]) {
                assistant.ask('Activation unsuccessful.  Can you provide your activation code again?')
                return
            }
            let apartment = results[0]

            datastore.insert({
                key: datastore.key([ACTIVATION, device_id]),
                data: {
                    name: apartment.name,
                    number: apartment.number,
                    keyphrase: activationCode,
                    device_id: device_id
                }
            }).then(() => {
                assistant.ask('Thanks! ')
            })
        })
    })

Answer 1

承诺的整个模式是

Promise((resolve, reject) => {
  // ...
});

现在该如何使用

promiseFunc(...)
   .then((x) => {
     // It get executed well
   })
   .catch((x) => {
     // An error happened
   });

在您的代码中，您缺少.catch部分。因此，如果错误被抛入您的promise函数，您将无法捕获它并导致节点异常。这就是您收到以下警告的原因：Unhandled promise rejection

Answer 2

您收到该错误消息是因为您不适合何时使用承诺拒绝而不是解决。

在您调用'.then'的代码中，即承诺已解决的时间。但是，当承诺被拒绝时，你没有任何行动。以下面的例子为例;

HAVING

或者你可以这样写它

// psuedo promise function which resolves if the data is good and rejects if the data is bad
function myPromiseFunction() {
    return new Promise((resolve,reject) => {
        // do something like make a http call here...
        // if the response is good
        return resolve(response)
        // if the response is not so good
        return reject(error)
    });
}

// using the promise function
myPromiseFunction()
    .then((response) => {
        console.log(response);
    }, (error) => { // <---- you are missing this part
        console.log(error);
    });

未处理的承诺拒绝 - 关键路径不完整

2 个答案: