Trying to connect mLAB DB from localhost server? Authentication failed - json

Question

Below is the code Snippet :
var mongoose = require('mongoose');
//mongodb://localhost/db
mongoose.connect('mongodb://username:pwd#ds117859.mlab.com:17859/db');
var db = mongoose.connection;
Now when I connect to localhost server, it works fine and I am able to perform operations on local Mongo DB
But when I connect to my db on MLAB, I get the following error:
$ node app.js
Server started on port 3000
(node:8648) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): MongoError: Authentication failed.
When I print the error object I get this :
err { MongoError: Authentication failed.
at C:\Users\user\Desktop\loginapp-master\node_modules\mongoose\node_modules\mongodb-core\lib\connection\pool.js:595:61
at authenticateStragglers (C:\Users\user\Desktop\loginapp-master\node_modules\mongoose\node_modules\mongodb-core\lib\connection\pool.js:513:16)
at Connection.messageHandler (C:\Users\user\Desktop\loginapp-master\node_modules\mongoose\node_modules\mongodb-core\lib\connection\pool.js:549:5)
at emitMessageHandler (C:\Users\user\Desktop\loginapp-master\node_modules\mongoose\node_modules\mongodb-core\lib\connection\connection.js:309:10)
at Socket.<anonymous> (C:\Users\user\Desktop\loginapp-master\node_modules\mongoose\node_modules\mongodb-core\lib\connection\connection.js:452:17)
at emitOne (events.js:96:13)
at Socket.emit (events.js:188:7)
at readableAddChunk (_stream_readable.js:176:18)
at Socket.Readable.push (_stream_readable.js:134:10)
at TCP.onread (net.js:547:20)
name: 'MongoError',
message: 'Authentication failed.',
ok: 0,
errmsg: 'Authentication failed.',
code: 18,
codeName: 'AuthenticationFailed' }

Answer 1

//replace username,password and databasename
var mongoose = require('mongoose');
var mongodbUrl = "mongodb://username:password#ds153869.mlab.com:53869/databasename";
mongoose.connect(mongodbUrl, { useNewUrlParser: true });
mongoose.connection.on("connected", function(){
console.log("mongoose database connected with " + mongodbUrl);
});
mongoose.connection.on("error", function(err){
console.log("Unable to connect with " +mongodbUrl + "error are"+ err);
});