*when I try to deploy I have this error * I am new to java script .. am creating posts sharing with chat option I want to receive notification from firebase so I am using this code but there is an error while deploying please help me guys I am searching solution for this from 6hours but I didn't found
62:12 warning Avoid nesting promises promise/no-nesting
88:14 warning Avoid nesting promises promise/no-nesting
88:69 error Each then() should return a value or throw promise/always-return
✖ 3 problems (1 error, 2 warnings)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! functions@ lint: `eslint .`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the functions@ lint script.
npm ERR! This is probably not a problem with npm. There is likelyadditional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! /Users/alpha/.npm/_logs/2018-05-16T18_06_07_691Z-debug.log
Error: functions predeploy error: Command terminated with non-zero exit code1
Having trouble? Try firebase deploy --help
this is my node.js(index.js) code
'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",
click_action : "in.tvac.akshaye.lapitchat_TARGET_NOTIFICATION"
},
data : {
from_user_id : from_user_id
}
};
/*
* 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');
});
});
});
});
.onWrit e(event => {