Node.js is commonly used for interacting with databases, including NoSQL databases like MongoDB. In this guide, we'll walk through the steps to interact with a MongoDB database using the popular MongoDB Node.js driver.
Step 1: Install Dependencies
To work with MongoDB in Node.js, you'll need to install the MongoDB Node.js driver. You can do this using npm:
npm install mongodb
Step 2: Connect to MongoDB
In your Node.js application, you'll need to create a connection to your MongoDB database using the MongoClient from the MongoDB driver.
const { MongoClient } = require('mongodb');
// Connection URL and database name
const url = 'mongodb://localhost:27017';
const dbName = 'mydb';
// Create a new MongoClient
const client = new MongoClient(url, { useUnifiedTopology: true });
// Connect to the MongoDB server
client.connect((err) => {
if (err) {
console.error('Error connecting to MongoDB:', err);
return;
}
// Connected successfully to the server
console.log('Connected to MongoDB');
// Use the connected client to interact with the database
const db = client.db(dbName);
// Perform database operations here...
// Close the connection when done
client.close();
});
Step 3: Perform Database Operations
Once connected to the database, you can perform various operations such as inserting, updating, deleting, and querying data. Here are some common operations:
