How to Connect Node.js Application with MongoDB on CentOS & Fedora

This article will help you to connect Node.js application with MongoDB. Also, configure MongoDB drive for nodejs using Mongoose node application on CentOS and Redhat systems.

Step 1 – Prerequsities

We assume you already have Node.js and MongoDB installed on your system. If not installed follow our below tutorial first to complete the required installation.

• Install MongoDB on CentOS & Fedora
• Install Node.js on CentOS & Fedora

Step 2 – Install mongoose Module

Mongoose provides a straightforward schema-based solution to modeling your application data and includes built-in typecasting, validation and many more.

npm install mongoose

Step 3 – Connect Nodejs with MongoDB

Create a test_server.js file and add below content to the file. For the more details about working with Node.js and MongoDB with mongoose read this tutorial.

// Sample script of Node.js with MongoDB Connection

// This code requires mongoose node module
var mongoose = require('mongoose');

// Connecting local mongodb database named test
var db = mongoose.connect('mongodb://127.0.0.1:27017/test');

// testing connectivity
mongoose.connection.once('connected', function() {
	console.log("Database connected successfully")
});

Now lets execute the test_server.js using node. If you get message 「Database connected successfully」, It means your node.js app is successfully connecting database.

node test_server.js

Database connected successfully