🗄️ MongoDB

MongoDB

MongoDB is a popular NoSQL database designed for scalability and flexibility. This guide will help you install MongoDB on your system and set up a basic database.

Step 1: Download MongoDB

Go to the official MongoDB Download Center.
Select the latest Community Server version for your operating system.
Download and install MongoDB following the provided instructions.

Step 2: Install MongoDB

On Windows:

Run the downloaded .msi file.
Follow the installation wizard and select Complete Installation.
Ensure the MongoDB Database Server option is checked.
Optionally, install MongoDB Compass (GUI tool for MongoDB).
Complete the installation and restart your system if necessary.

On macOS:

Open the terminal and install MongoDB using Homebrew:

brew tap mongodb/brew
brew install mongodb-community@6.0

Start the MongoDB service:

brew services start mongodb-community@6.0

Verify installation:
```
mongod --version
```

On Linux (Ubuntu/Debian):

Import the MongoDB public key:

wget -qO - https://www.mongodb.org/static/pgp/server-6.0.asc | sudo apt-key add -

Add the MongoDB repository:

echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu focal/mongodb-org/6.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-6.0.list

Update package lists and install MongoDB:

sudo apt update
sudo apt install -y mongodb-org

Start MongoDB service:
```
sudo systemctl start mongod
```
Enable MongoDB to start on boot:
```
sudo systemctl enable mongod
```

Step 3: Verify MongoDB Installation

Run the following command to check if MongoDB is running:

mongo --eval 'db.runCommand({ connectionStatus: 1 })'

Step 4: Create and Use a Database

Open the MongoDB shell:
```
mongo
```
Create a new database:
```
use mydatabase
```

Insert a document into a collection:

db.users.insertOne({ name: "John Doe", age: 30 })

Retrieve the document:
```
db.users.find().pretty()
```

Step 5: Run an Example Node.js MongoDB Connection

Install the MongoDB Node.js driver:
```
npm install mongodb
```

Create a new JavaScript file app.js:

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

const uri = "mongodb://localhost:27017";
const client = new MongoClient(uri);

async function run() {
    try {
        await client.connect();
        console.log("Connected to MongoDB");
        const database = client.db("mydatabase");
        const users = database.collection("users");
        const user = await users.findOne({ name: "John Doe" });
        console.log(user);
    } finally {
        await client.close();
    }
}
run().catch(console.error);

Run the script:
```
node app.js
```

Conclusion

You have successfully installed MongoDB, created a database, and connected it with a Node.js application. You can now start developing applications using MongoDB!