Node.js CRUD Operations with MongoDB & Express – Tutorial

In this tutorial, we will take a look at how to perform CRUD (Create, Read, Update, Delete) operations using Node.js, MongoDB, and Express. Node.js is a popular and widely used server-side JavaScript runtime, while MongoDB is a NoSQL database that is known for its flexibility and scalability. Express is a fast, unopinionated, minimalist web framework for Node.js that provides a robust set of features for web and mobile applications.

Setting up the Environment

Before we start with the CRUD operations, we need to set up our development environment. First, make sure you have Node.js and MongoDB installed on your system. You can download and install Node.js from its official website, and MongoDB from its official website as well.

Creating a Node.js Project

Once you have Node.js and MongoDB installed, you can create a new directory for your project and navigate to it in your terminal. Then, use the command “npm init” to create a new Node.js project. This will create a package.json file in your project directory, which will contain all the information about your project and its dependencies.

Installing Express and MongoDB

Next, you will need to install the Express and MongoDB npm packages. You can do this by running the following commands in your terminal:


npm install express
npm install mongodb


Setting up the Express Server

Now that we have all the necessary dependencies installed, we can start setting up our Express server. Create a new file called “server.js” in your project directory and use the following code to set up a basic Express server:


const express = require('express');
const app = express();

app.listen(3000, () => {
console.log('Server is running on port 3000');
});


Connecting to MongoDB

After setting up the Express server, we need to connect to our MongoDB database. You can do this by using the MongoDB client and connecting to your MongoDB database. Use the following code to connect to your MongoDB database:


const MongoClient = require('mongodb').MongoClient;
const url = 'mongodb://localhost:27017';

MongoClient.connect(url, (err, db) => {
if (err) throw err;
console.log('Connected to MongoDB');
});


Performing CRUD Operations

With the MongoDB connection established, we can now perform CRUD operations on our database. Here is an example of how to perform CRUD operations using MongoDB and Express:


// Create operation
app.post('/users', (req, res) => {
// Code to create a new user in the database
});

// Read operation
app.get('/users', (req, res) => {
// Code to retrieve all users from the database
});

// Update operation
app.put('/users/:id', (req, res) => {
// Code to update a user in the database
});

// Delete operation
app.delete('/users/:id', (req, res) => {
// Code to delete a user from the database
});


Conclusion

With Node.js, MongoDB, and Express, you can easily perform CRUD operations on your database. This tutorial covered the basic setup and implementation of CRUD operations using these technologies, but there is much more that you can do with them. We hope you found this tutorial helpful, and we encourage you to explore further and experiment with these technologies to build powerful and scalable applications.