如何使用 Angular 5 写入 Firestore？

Question

我已使用本教程 https://angularfirebase.com/lessons/angular-stripe-payments-part-2-firebase-cloud-functions-backend/ 将我的 Stripe 结帐连接到 Firebase 实时数据库

成功了。但是，我需要使用 Firestore 进行结帐流程，因为我们已将数据库迁移到那里。不幸的是，它不起作用！该功能有效，但数据仍保存在实时数据库中，而不是 Firestore。这是我的代码：

const functions = require('firebase-functions');
const admin = require('firebase-admin')

admin.initializeApp(functions.config().firebase);

const firebaseConfig = JSON.parse(process.env.FIREBASE_CONFIG);

const db = admin.firestore(); // Firebase
const stripe = require('stripe')(functions.config().stripe.testkey) // Stripe

exports.stripeCharge = functions.firestore
                                .document('/payments/{userId}') 
                                .onWrite(event => {

    const payment = event.data.val();
    const userId = event.params.userId;
    const paymentId = event.params.paymentId;

    // checks if payment exists or if it has already been charged
    if (!payment || payment.charge) return;

    return admin.firestore()
          .collection('payments')
          .doc('{userId}')
          .once('value')
          .then(snapshot => {
              return snapshot.val();
           })
           .then(customer => {

             const amount = payment.amount;
             const idempotency_key = paymentId;  // prevent duplicate charges
             const source = payment.testkey.id;
             const currency = 'php';
             const charge = {amount, currency, source};


             return stripe.charges.create(charge, { idempotency_key });

           })

           .then(charge => {
               db
               .collection('payments')
               .doc('{userId}')
               .collection('{paymentId}')
               .field('charge')
               .set(charge)
              })

 });

从教程的第 1 部分开始，数据库结构是这样的：

payments
    $userId
        $paymentId
             amount: number
             token: object
             charge: object

Answer 1

我认为您正在使用 firebase-functions >1.0.0

admin.initializeApp();

查看完整的迁移指南here