Web-Development/Week-05/Day_05/README.md

MongoDB with Node.js

Introduction

In this task, we connect MongoDB with Node.js to perform database operations using JavaScript. This allows building dynamic backend applications.

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Install Required Package

npm init -y
npm install mongodb

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Connect to MongoDB

const { MongoClient } = require('mongodb');

const url = 'mongodb://127.0.0.1:27017';
const client = new MongoClient(url);

async function connectDB() {
  try {
    await client.connect();
    console.log("Connected to MongoDB");
  } catch (error) {
    console.error(error);
  }
}

connectDB();

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Access Database and Collection

const db = client.db('studentDB');
const collection = db.collection('students');

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Insert Data

await collection.insertOne({
  name: "Rahul",
  course: "MCA"
});

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Fetch Data

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

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Update Data

await collection.updateOne(
  { name: "Rahul" },
  { $set: { course: "MBA" } }
);

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Delete Data

await collection.deleteOne({ name: "Rahul" });

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Project Structure

project/
│
├── node_modules/
├── app.js
├── package.json

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Run the Application

node app.js