Firebase Firestore功能通知Android

Question

我需要有关firestore功能的帮助。我正在开发一个需要通知的应用程序，我正在使用firebase作为后端，我对云功能特性完全陌生。

所以我想在将文档添加到集合时向用户发送通知，我已经尝试为函数设置一些东西，但是由于我不知道的原因它不起作用，我的Node Js是更新版本，firebase工具更新但我仍然得到错误。

这是我的index.js文件和错误消息。我感谢任何帮助。

'use strict'

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

exports.sendNotification = functions.firestore.document('Users/{userId}/Notifications/{notificationId}').onWrite((change, context) =>{

const userId = context.params.userId;
const notificationId = context.params.notificationId;

console.log('The User id is : ', userId);


if(!context.data.val()){

    return console.log('A notification has been deleted from the database');

}

// ref to the parent document
const device_token = admin.firestore.doc('Users/${userId}/Token/${userId}/deviceToken').once('value');

return device_token.then(result => {

    const token_id = result.val();

    const payLoad = {

    notification:{
        title: "Qubbe",
        body: "You have a new comment!",
        icon: "default"
    }

};

return admin.messaging().sendToDevice(token_id, payLoad).then(response => {

        console.log('This is the notification feature');

});

});
device_token.catch(error => {
    console.log(error);
});

});

错误：Scrrenshot to error in command line

Answer 1

由于您使用以下语法onWrite((change, context)...)，我假设您使用的是Cloud Functions版本> = 1.0。

对于版本> = 1.0，您应该在没有任何参数的情况下初始化firebase-admin，如下所示：

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

见https://firebase.google.com/docs/functions/beta-v1-diff#new_initialization_syntax_for_firebase-admin

Answer 2

感谢您的回复，问题现在已经解决了。

我首先删除了我的旧功能，然后重新开始，然后我全局安装了最新的firebase工具，并像平时一样在启动时更新npm工具。然后我在我的firestore中使用了这段代码：

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



//const firestore = new Firestore();
//const settings = {/* Date... */ timestampsInSnapshots: true};
//firestore.settings(settings);

exports.sendNotification = 
functions.firestore.document('Users/{userId}/Notifications/{notificationId}')
.onWrite((c hange, context) =>{

const userId = context.params.userId;
const notificationId = context.params.notificationId;

console.log('The User id is : ', userId);
console.log('The Notification id is : ', notificationId);

// ref to the parent document

return admin.firestore().collection("Users").doc(userId).collection("Token").doc(userId).get().then(queryResult => {
    const tokenId = queryResult.data().deviceToken;

    //const toUser = admin.firestore().collection("Users").doc(userId).collection("Notifications").doc(notificationId).get();

        const notificationContent = {
                notification:{
                    title: "/*App name */",
                    body: "You have a new Comment!",
                    icon: "default",
                    click_action: "/*Package */_TARGET_NOTIFICATION"
            }
        };

        return admin.messaging().sendToDevice(tokenId, notificationContent).then(result => {
            console.log("Notification sent!");
            //admin.firestore().collection("notifications").doc(userEmail).collection("userNotifications").doc(notificationId).delete();
        });

   });

});