eslint throws error

Question

i am new android beginner and try to deploy firebase functions but show some error how to solve this problem plz help me.

Firebase database structure

User Table

• Users
  • user_id
    • device_token : user_device_token
    • Name : user_name

Notification Table

• notifications
  • to_user_id
    • notification_id
      • from : from_user_id

Error

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 show error **

C:\\Users\\TahirAliAwan\\Desktop\\Function>firebase deploy === Deploying to 'videochat-96f75'... i deploying functions Running command: npm --prefix %RESOURCE_DIR% run lint functions@ lint C:\\Users\\TahirAliAwan\\Desktop\\Function\\functions eslint . C:\\Users\\TahirAliAwan\\Desktop\\Function\\functions\\index.js 61:11 warning Avoid nesting promises promise/no-nesting 84:14 warning Avoid nesting promises promise/no-nesting 84:69 error Each then() should return a value or throw promise/always-return ✖ 3 problems (1 error, 2 warnings) npm ERR! Windows_NT 10.0.10586 npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "--prefix" "C:\\Users\\TahirAliAwan\\Desktop\\Function\\functions" "run" "lint" npm ERR! node v6.11.5 npm ERR! npm v3.10.10 npm ERR! code ELIFECYCLE npm ERR! functions@ lint: eslint . npm ERR! Exit status 1 npm ERR! npm ERR! Failed at the functions@ lint script 'eslint .'. npm ERR! Make sure you have the latest version of node.js and npm installed. npm ERR! If you do, this is most likely a problem with the functions package, npm ERR! not with npm itself. npm ERR! Tell the author that this fails on your system: npm ERR! eslint . npm ERR! You can get information on how to open an issue for this project with: npm ERR! npm bugs functions npm ERR! Or if that isn't available, you can get their info via: npm ERR! npm owner ls functions npm ERR! There is likely additional logging output above. npm ERR! Please include the following file with any support request: npm ERR! C:\\Users\\TahirAliAwan\\Desktop\\Function\\npm-debug.log Error: functions predeploy error: Command terminated with non-zero exit code1

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。