eslint引发错误

Question

我是新来的android初学者，并尝试部署firebase函数，但显示一些错误如何解决此问题，请帮助我。

Firebase数据库结构

用户表

• 用户数
  • 用户身份
    • device_token：user_device_token
    • 名称：user_name

通知表

• 通知
  • to_user_id
    • notification_id
      • 来自：from_user_id

错误

Index.js

 'use strict' const functions = require('firebase-functions'); const admin = require('firebase-admin'); admin.initializeApp(functions.config().firebase); /* * 'OnWrite' works as 'addValueEventListener' for android. It will fire the function * everytime there is some item added, removed or changed from the provided 'database.ref' * 'sendNotification' is the name of the function, which can be changed according to * your requirement */ exports.sendNotification = functions.database.ref('/notifications/{user_id}/{notification_id}').onWrite(event => { /* * You can store values as variables from the 'database.ref' * Just like here, I've done for 'user_id' and 'notification' */ const user_id = event.params.user_id; const notification_id = event.params.notification_id; console.log('We have a notification from : ', user_id); /* * Stops proceeding to the rest of the function if the entry is deleted from database. * If you want to work with what should happen when an entry is deleted, you can replace the * line from "return console.log.... " */ if(!event.data.val()){ return console.log('A Notification has been deleted from the database : ', notification_id); } /* * 'fromUser' query retreives the ID of the user who sent the notification */ const fromUser = admin.database().ref(`/notifications/${user_id}/${notification_id}`).once('value'); return fromUser.then(fromUserResult => { const from_user_id = fromUserResult.val().from; console.log('You have new notification from : ', from_user_id); /* * The we run two queries at a time using Firebase 'Promise'. * One to get the name of the user who sent the notification * another one to get the devicetoken to the device we want to send notification to */ const userQuery = admin.database().ref(`/Users/${from_user_id}/Name`).once('value'); const deviceToken = admin.database().ref(`/Users/${user_id}/device_token`).once('value'); return Promise.all([userQuery, deviceToken]).then(result => { const userName = result[0].val(); const token_id = result[1].val(); /* * We are creating a 'payload' to create a notification to be sent. */ const payload = { notification: { title : "New Friend Request", body: `${userName} has sent you request`, icon: "default", } }; /* * Then using admin.messaging() we are sending the payload notification to the token_id of * the device we retreived. */ return admin.messaging().sendToDevice(token_id, payload).then(response => { console.log('This was the notification Feature'); }); }); }); }); 

** cmd显示错误**

C：\\ Users \\ TahirAliAwan \\ Desktop \\ Function> firebase deploy ===部署到'videochat-96f75'...我正在部署函数运行命令：npm --prefix％RESOURCE_DIR％运行lint函数@ lint C：\\ Users \\ TahirAliAwan \\ Desktop \\ Function \\ functions eslint。 C：\\ Users \\ TahirAliAwan \\ Desktop \\ Function \\ functions \\ index.js 61:11警告避免嵌套promise promise /不嵌套84:14警告避免嵌套promise promise / nonested 84:69错误每个then（）应该返回值或抛出承诺/始终返回✖3个问题（1个错误，2个警告）npm ERR！ Windows_NT 10.0.10586 npm错误！ argv“ C：\\ Program Files \\ nodejs \\ node.exe”“ C：\\ Program Files \\ nodejs \\ node_modules \\ npm \\ bin \\ npm-cli.js”“-前缀”“ C：\\ Users \\ TahirAliAwan \\ Desktop \\ Function \\ functions“” run“” lint“ npm ERR！ 节点v6.11.5 npm ERR！ npm v3.10.10 npm错误！ 代码ELIFECYCLE npm ERR！ functions @ lint： eslint . npm ERR！ 退出状态1 npm ERR！ npm ERR！ 在functions @ lint脚本“ eslint”处失败。 npm ERR！ 确保已安装最新版本的node.js和npm。 npm ERR！ 如果这样做，这很可能是功能包npm ERR的问题！ 不与npm本身。 npm ERR！ 告诉作者这在您的系统上失败：npm ERR！ 埃斯林特。 npm ERR！ 您可以通过以下方式获取有关如何为此项目打开问题的信息：npm ERR！ npm错误功能npm错误！ 或者，如果不可用，则可以通过以下方式获取其信息：npm ERR！ npm owner ls函数npm ERR！ 上面可能还有其他日志记录输出。 npm ERR！ 请在支持请求中包含以下文件：npm ERR！ C：\\ Users \\ TahirAliAwan \\ Desktop \\ Function \\ npm-debug.log错误：函数预部署错误：命令以非零退出代码终止

Answer 1

在@PeterHaddad技巧和我的努力之后，我通过删除此行.then(response => { console.log('This was the notification Feature'); is .then(response => { console.log('This was the notification Feature');并更新了nodejs。解决了所有问题。