How to use MongoDB with promises in Node.js?

0 votes

I've been trying to discover how to use MongoDB with Node.js and in the docs it seems the suggested way is to use callbacks. Now, I know that it is just a matter of preference, but I really prefer using promises.

The problem is that I didn't find how to use them with MongoDB. Indeed, I've tried the following:

var MongoClient = require('mongodb').MongoClient;

var url = 'mongodb://localhost:27017/example';

MongoClient.connect(url).then(function (err, db) {
    console.log(db);
});

And the result is undefined. In that case it seems this is not the way to do so.

Is there any way to use mongo db inside Node with promises instead of callbacks?

Oct 11 in Node-js by kartik
• 35,820 points
46 views

1 answer to this question.

0 votes

Hello @kartik,

Try this:

var MongoClient = require('mongodb').MongoClient
var url = 'mongodb://localhost:27017/example'
MongoClient.connect(url)
  .then(function (db) { // <- db as first argument
    console.log(db)
  })
  .catch(function (err) {})

Hope it helps!!
Thank you!!

answered Oct 11 by Niroj
• 78,120 points

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