如何在不使用实时数据库的情况下获取服务器时间戳 但是使用Firestore?
import * as functions from 'firebase-functions'
import { Firestore } from '@google-cloud/firestore'
const db = new Firestore()
export let testIfMatch = functions.firestore
.document('users/{userId}/invites/{invitedUid}')
.onCreate(event => {
let invite = <any>event.data.data()
if (invite.accepted == true) {
return db.collection('matches').add({
friends: [userId, invitedUid],
timestamp: doc.readTime // <--- not exactly the actual time
})
}
答案 0 :(得分:25)
使用Firestore的服务器时间戳略有不同:
// Get the `FieldValue` object
var FieldValue = require("firebase-admin").FieldValue;
// Create a document reference
var docRef = db.collection('objects').doc('some-id');
// Update the timestamp field with the value from the server
var updateTimestamp = docRef.update({
timestamp: FieldValue.serverTimestamp()
});
如果它不起作用,您可以使用var FieldValue = require("firebase-admin").FieldValue;
var FieldValue = require("firebase-admin").firestore.FieldValue;
答案 1 :(得分:1)
这是一种更为简洁的方法:
import * as admin from "firebase-admin"
const timestamp = admin.firestore.FieldValue.serverTimestamp();
答案 2 :(得分:0)
如果您使用的是Firestore,则可以使用以下代码段。
const admin = require('firebase-admin');
admin.initializeApp();
const db = admin.firestore()
val ts = db.FieldValue.serverTimestamp()
答案 3 :(得分:0)
这是我的方法。不需要将'@google-cloud/firestore'
添加为项目的依赖项,并且无需在代码中添加大量admin.firestore.xxx
。
import * as admin from "firebase-admin";
import FieldValue = admin.firestore.FieldValue;
// import anything else you want to alias
someRef.set({timestamp: FieldValue.serverTimestamp()});