云函数中未预期的令牌db

Question

我正在使用firebasecloud函数，我想在firebaseDB中添加产品时发送通知。为了做到这一点，我正在从消防商店获取设备令牌。然而，当我运行firebase deploy时，我会收到以下错误消息：

error  Parsing error: Unexpected token db

这是index.js中的代码

/* eslint-disable */ 
const functions = require("firebase-functions");
const admin = require('firebase-admin');
const db = admin.firestore();
exports.sendToDevice = functions.database
.ref('products/{productId}')
.onCreate((snapshot, context) => {
// const product = snapshot.val();

const querySnapshot = await db
.collection('users')
.doc('abcdefgh1235678')
.collection('tokens')
.get();
const tokens = querySnapshot.docs.map(snap => snap.id);
admin.messaging().sendToDevice(tokens,{ 
notification: {
title: 'New Product!',
body: `New product is  ${context.params.productId}`,
click_action: 'FLUTTER_NOTIFICATION_CLICK'
}
});
return;
});

更新我的答案后，我得到了以下错误：

error分析错误：意外的令牌=>

/* eslint-disable */ 
const functions = require("firebase-functions");
const admin = require('firebase-admin');
admin.initializeApp();  
const db = admin.firestore();
exports.printitemcreated = functions.database.ref('/products/{productId}')
.onCreate(async(snapshot, context) => {
const original = snapshot.val();     
const querySnapshot = await db
.collection('users')
.doc('abcdefg123456')
.collection('tokens')
.get();

const tokens = querySnapshot.docs.map(snap => snap.id);
await admin.messaging().sendToDevice(tokens,{ 
notification: {
title: 'New Product!',
body: `New product is  ${context.params.productId}`,
click_action: 'FLUTTER_NOTIFICATION_CLICK'
}
});
return;
});

Answer 1

AFAIKdb不是云函数的保留关键字。

问题很可能来自于您没有初始化管理应用程序实例的事实。你应该做admin.initializeApp();。

此外，您的Cloud函数还包含其他(关键(错误：您使用await时没有将处理程序声明为async，也没有等待对admin.messaging()的调用。

以下代码应该有效：

const functions = require("firebase-functions");
const admin = require('firebase-admin');
admin.initializeApp(); // <- See here
const db = admin.firestore();
exports.sendToDevice = functions.database
.ref('products/{productId}')
.onCreate(async (snapshot, context) => {    // <- See async here
// const product = snapshot.val();

const querySnapshot = await db
.collection('users')
.doc('abcdefgh1235678')
.collection('tokens')
.get();
const tokens = querySnapshot.docs.map(snap => snap.id);
await admin.messaging().sendToDevice(tokens,{    // <- See await here
notification: {
title: 'New Product!',
body: `New product is  ${context.params.productId}`,
click_action: 'FLUTTER_NOTIFICATION_CLICK'
}
});
return null;    // <- See null here
});