在 Cloud Function 中使用 Cloud Firestore 數據

Question

我正在嘗試創建從 Cloud Firestore 獲取數據的 Cloud Functions，並使用從 Cloud Firestore 獲取的值向支付網關 API 發送支付請求。

我可以使用這個 function 從 Firestore 獲取我需要的文檔：

exports.getData = functions.https.onRequest((req, res) => {
  const docRef = db.collection('requests').doc('vsFyJ5lisBgYNwQEzOLa');
  const getDoc = docRef.get()
    .then(doc => {
      if (!doc.exists) {
        console.log('No such document!');
        return res.send('Not Found')
      } 
        console.log(doc.data());
        return res.send(doc.data());
    })
    .catch(err => {
      console.log('Error getting document', err);
      
    });
    
 });

但是，此 function 僅打印文檔值； 我需要使用另一個 function 中的值，如下所示：

exports.pay = functions.https.onRequest((req, res) => {
  var Iyzipay = require('iyzipay');
  const doc = db.collection('requests').doc('vsFyJ5lisBgYNwQEzOLa');
  const iyzipay = new Iyzipay({
    apiKey: 'apiKey',
    secretKey: 'secretKey',
      uri: 'https://sandbox-api.iyzipay.com'
  });
  var request = {
    locale: Iyzipay.LOCALE.TR,
    conversationId: '123456789',
    price: doc.price,
    paidPrice: doc.paidPrice,
    currency: Iyzipay.CURRENCY.TRY,
    installment: '1',
    basketId: 'B67832',
    paymentChannel: Iyzipay.PAYMENT_CHANNEL.WEB,
    paymentGroup: Iyzipay.PAYMENT_GROUP.PRODUCT,
    paymentCard: {
        cardHolderName: doc.cardHolderName,
        cardNumber: doc.cardNumber,
        expireMonth: doc.expireMonth,
        expireYear: doc.expireYear,
        cvc: doc.cvc,
        registerCard: '0'
    },
  };
iyzipay.payment.create(request, function (err, result) {
  console.log(err, result);
});
});

我試圖結合如下功能：

exports.pay = functions.https.onRequest((req, res) => {
  var Iyzipay = require('iyzipay');
  const doc = db.collection('requests').doc('vsFyJ5lisBgYNwQEzOLa');
  const iyzipay = new Iyzipay({
    apiKey: 'sandbox-afXhZPW0MQlE4dCUUlHcEopnMBgXnAZI',
    secretKey: 'sandbox-wbwpzKIiplZxI3hh5ALI4FJyAcZKL6kq',
      uri: 'https://sandbox-api.iyzipay.com'
  });
  const docRef = db.collection('requests').doc('vsFyJ5lisBgYNwQEzOLa');
  const getDoc = docRef.get()
    .then(doc => {
      if (!doc.exists) {
        console.log('No such document!');
        return res.send('Not Found')
      } 
        console.log(doc.data());
        return res.send(doc.data());
    })
    .catch(err => {
      console.log('Error getting document', err);
      
    });
  var request = {
    locale: Iyzipay.LOCALE.TR,
    conversationId: '123456789',
    price: '1',
    paidPrice: '1.2',
    currency: Iyzipay.CURRENCY.TRY,
    installment: '1',
    basketId: 'B67832',
    paymentChannel: Iyzipay.PAYMENT_CHANNEL.WEB,
    paymentGroup: Iyzipay.PAYMENT_GROUP.PRODUCT,
    paymentCard: {
        cardHolderName: doc.cardHolderName,
        cardNumber: doc.cardNumber,
        expireMonth: doc.expireMonth,
        expireYear: doc.expireYear,
        cvc: doc.cvc,
        registerCard: '0'
    }        
  };
iyzipay.payment.create(request, function (err, result) {
  console.log(err, result);
});
});

當 Firestore 查詢像以前一樣打印在控制台上時，支付處理器返回錯誤。

然后我嘗試使用 static 值嘗試調用支付處理器，如下所示：

var request = {
    locale: Iyzipay.LOCALE.TR,
    conversationId: '123456789',
    price: '1',
    paidPrice: '1.2',
    currency: Iyzipay.CURRENCY.TRY,
    installment: '1',
    basketId: 'B67832',
    paymentChannel: Iyzipay.PAYMENT_CHANNEL.WEB,
    paymentGroup: Iyzipay.PAYMENT_GROUP.LISTING,
    paymentCard: {
        cardHolderName: 'John Doe',
        cardNumber: '5528790000000008',
        expireMonth: '12',
        expireYear: '2030',
        cvc: '123',
        registerCard: '0'
}
}

並且支付處理器返回成功，所以我獲取或使用 Firestore 文檔值的方式一定有問題。

為了再次測試它是否確實使用了 Firestore 值，我只將一個字段切換到cardNumber: doc.cardNumber 。 控制台返回：

✔  functions[pay]: http function initialized (http://localhost:5000/highmidlow1/us-central1/pay).
i  functions: Beginning execution of "pay"
⚠  External network resource requested!
   - URL: "https://sandbox-api.iyzipay.com/payment/auth"
 - Be careful, this may be a production service.
⚠  Google API requested!
   - URL: "https://oauth2.googleapis.com/token"
   - Be careful, this may be a production service.
>  null {
>    status: 'failure',
>    errorCode: '12',
>    errorMessage: 'Invalid card number',
>    locale: 'tr',
>    systemTime: 1608311421424,
>    conversationId: '123456789'
>  }
>  {
>    expireYear: '2030',
>    paidPrice: 1.2,
>    cardNumber: '5528790000000008',
>    cvc: '123',
>    price: 1,
>    expireMonth: '12',  }

那么如何從 Firestore 獲取文檔並在 Cloud Function 中使用其值，例如price: doc.price ？

Answer 1

我認為您需要將您的請求邏輯移動到.then(...)塊中，因為現在看起來您正試圖在實際返回的塊之外使用文檔結果，這可能就是您的原因重新收到“無效卡號”錯誤。

Firestore API 將 Promises 用於大多數/所有 fetch 操作，因此您始終需要在使用它之前等待結果。

// ...
docRef.get().then(doc => {
    if (!doc.exists) {
        console.log('No such document!');
        return res.send('Not Found')
    }
    console.log(doc.data());
    res.send(doc.data());

    const request = { ... }
})

如果您使用的是支持async/await的節點版本，則可能更容易發現這些類型的錯誤。

const doc = await docRef.get()
if (!doc.exists) {
    console.log('No such document!');
    return res.send('Not Found')
}
console.log(doc.data());
res.send(doc.data());

const request = { ... }