javascript - Firebase 云功能/Firestore

Question

每当创建新客户时，我都在尝试运行一个 firebase 云函数来为 Angular 5 项目进行原子(批量)更新。

我不断收到此错误，无法确定问题所在:

控制台错误

Error: Cannot encode type ([object Undefined]) to a Firestore Value at Function.encodeValue (/user_code/node_modules/firebase-admin/node_modules/@google-cloud/firestore/src/document.js:658:11)

云函数 (index.js)

const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);
const stripe = require('stripe')(functions.config().stripe.testkey);

// 1. Create Stripe User on sign up

exports.createStripeCustomer = functions.auth.user().onCreate(event => {
    // user auth data
    const user = event.data;

    // register Stripe user
    return stripe.customers.create({
        email: user.email
    })
    .then(customer => {
        const db = admin.firestore();
        const batch = db.batch();
        const currentTime = this.timestamp;
        const customerDoc = db.collection('customers').doc(customer.id);
        const userDoc = db.collection('users').doc(user.uid);

        batch.set(customerDoc, {userId: user.uid, timestamp: currentTime });
        batch.set(userDoc, {customerId: customer.id, timestamp: currentTime });

        return batch.commit();

    });
});

Answer 1

我刚刚发现了错误。我正在定义 currentTime 和 this.timestamp 但我从未定义过 timestamp。