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How to connect to MongoDB Atlas using Node.js

Rohit Dalal on July 23, 2020

In this post, I will tell you how you can connect to MongoDB Atlas, a cloud-based DB service, from your local Node.js / Express.js environment. Yo...

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Shibiru A Ararso • Apr 5 '22

const mongoose = require("mongoose");

const url = "mongodb+srv://userName:@cluster0.xesyn.mongodb.net/DBname?retryWrites=true&w=majority";

mongoose.connect(url, (err) => {
if (err) throw err;
console.log("Database created!");
});
I Connect in this way

you explained in details thank you so much

sdutta099 • Apr 29 '21

Is it a good practice to provide mongo admin password in app.js ? as if i push the code to git it might give warning . Btw i am new to node js. if not then what is best way to provide the password of admin in mongo url ?

Rohit Dalal • Apr 30 '21

you can pass the credentials via environment variables and make sure you don't push that to git. something like is used in production

const url="..<process.env.USERNAME>&<process.env.PASSWORD>";

added this just for demo purpose ;)

sdutta099 • Apr 30 '21

thanks a lot for the reply yes i tried using above step only

Chinmay-395 • Jan 31 '21

Thanks this helped.

Ivan J. Zapata-Rivera • Jan 27 '21

Hi, my coding friend!
I believe replacing
const url = ... with
const url = process.env.ATLAS_URI
would be a more secured approach.

Rohit Dalal • Jan 28 '21

Yes, definitely my coding friend.
I've added , for demo purpose.

Mayank-dev1822 • Feb 18 '21

Thanks a lot that helped 😄

Suyog Kubde • Mar 31 '23

const express = require("express");
const app = express();
const { MongoClient } = require("mongodb");
const PORT = 4000;
let db;

let connectionString = mongodb+srv://suyogkubde02:9881815220@cluster0.i2ofrpx.mongod.../?retryWrites=true&w=majority;

// app.use(express.json());

MongoClient.connect(
mongodb+srv://suyogkubde
:****@cluster0.i2ofrpx.mongodb.net/?retryWrites=true&w=majority,
{ useNewUrlParser: true },
(error, client) => {
console.log("error :", error);
console.log("client : ", client);
if (error) {
return console.log("Connection failed for some reason");
}
console.log("Connection established - All well");
db = client.db("crud");
app.listen(PORT, function () {
console.log("Server is running on Port: " + PORT);
});
}
);

For now I have just removed the password.
When I do node server.js it doesn't give any error or any output it just keep on loading even the execution don't end.