MongoDB CRUD Operations in Node.js Explained

MongoDB CRUD operations in Node.js are used to manage data in backend applications. CRUD stands for Create, Read, Update, and Delete. Understanding MongoDB CRUD operations in Node.js is important because every backend application needs to store and manage data efficiently.

Setup MongoDB in Node.js

Install MongoDB Driver

npm install mongodb

Basic Connection Code

const { MongoClient } = require(‘mongodb’);

const url = ‘mongodb://localhost:27017’;
const client = new MongoClient(url);

async function connectDB() {
await client.connect();
console.log(‘Database connected’);
}

connectDB();

Create Operation in MongoDB

Insert One Document

const db = client.db(‘test’);
const users = db.collection(‘users’);

await users.insertOne({ name: ‘Amit’, age: 25 });

Insert Multiple Documents

await users.insertMany([
{ name: ‘Rahul’, age: 24 },
{ name: ‘Neha’, age: 22 }
]);

Create operation is used to add new data into MongoDB.

Read Operation in MongoDB

Find All Documents

const data = await users.find().toArray();
console.log(data);

Find One Document

const user = await users.findOne({ name: ‘Amit’ });

Read operation is used to fetch data from the database.

Update Operation in MongoDB

Update One Document

await users.updateOne(
{ name: ‘Amit’ },
{ $set: { age: 26 } }
);

Update Multiple Documents

await users.updateMany(
{ age: { $lt: 25 } },
{ $set: { status: ‘young’ } }
);

Update operation is used to modify existing data.

Delete Operation in MongoDB

Delete One Document

await users.deleteOne({ name: ‘Amit’ });

Delete Multiple Documents

await users.deleteMany({ age: { $lt: 23 } });

Delete operation is used to remove data from MongoDB.

Complete CRUD Example in Node.js

const { MongoClient } = require(‘mongodb’);
const client = new MongoClient(‘mongodb://localhost:27017’);

async function run() {
await client.connect();
const db = client.db(‘test’);
const users = db.collection(‘users’);

await users.insertOne({ name: ‘Test User’, age: 20 });
const allUsers = await users.find().toArray();
console.log(allUsers);

await users.updateOne({ name: ‘Test User’ }, { $set: { age: 21 } });
await users.deleteOne({ name: ‘Test User’ });
}

run();

Best Practices for MongoDB CRUD Operations

Use Async Await

Always use async await for database operations.

Handle Errors

Wrap database calls inside try catch blocks.

Use Indexing

Use indexes for faster query performance.

Real-World Use of MongoDB CRUD

MongoDB CRUD operations in Node.js are used in applications like user management systems, e-commerce platforms, and dashboards. These operations form the core of backend development.

FAQs on MongoDB CRUD Operations

What is CRUD in MongoDB

CRUD stands for Create, Read, Update, and Delete operations.

How to perform CRUD in Node.js

You can use MongoDB driver methods like insertOne, find, updateOne, and deleteOne.

Is MongoDB good for backend development

Yes, MongoDB is widely used for backend development with Node.js.

Continue Learning Backend Development

Now that you understand MongoDB CRUD operations in Node.js, you are ready to move to the next lesson where you will learn about connecting MongoDB with Express.js using Mongoose. To explore more structured tutorials and courses, click here for more free courses.