MongoDB npm - Shell/Bash

If you're a Node.js developer looking for a powerful, scalable, and flexible database to use in your projects, MongoDB is probably on your radar. And if you want to interact with this database from the command line, the MongoDB npm package is what you need.

Integrating MongoDB with your Node.js application is easy and straightforward thanks to the MongoDB npm package. This package provides a simple and intuitive interface for interacting with MongoDB databases and collections directly from your Node.js code.

In addition to the Node.js interface, the MongoDB npm package also includes a command-line interface that lets you perform common database operations from the terminal. This means you can execute complex queries, perform backups and restores, and more, without ever leaving the command line.

Installing the MongoDB npm package

To install the MongoDB npm package, simply open a terminal window and run the following command:

npm install mongodb --save

This will download and install the package and its dependencies, and add it to your project's package.json file.

Connecting to a MongoDB database

Before you can interact with a MongoDB database using the MongoDB npm package, you need to establish a connection to the database. To do this, you can use the MongoClient object provided by the package.

Here's an example of how to connect to a local MongoDB database running on the default port:

const MongoClient = require('mongodb').MongoClient;

const url = 'mongodb://localhost:27017/myproject';

MongoClient.connect(url, (err, client) => {
  // ...
});

In this example, the MongoClient.connect() method establishes a connection to a MongoDB database running on the local machine on port 27017. If the connection is successful, the callback function is called with a client object that can be used to interact with the database.

Performing CRUD operations on a MongoDB collection

Once you have established a connection to a MongoDB database, you can perform CRUD (Create, Read, Update, Delete) operations on its collections using the Collection object provided by the MongoDB npm package.

Here's an example of how to perform CRUD operations on a users collection in a Mongo database:

const db = client.db('myproject');
const users = db.collection('users');

// Create a new user
const newUser = {
  username: 'johndoe',
  email: 'johndoe@example.com',
  password: '1234'
};

users.insert(newUser, (err, result) => {
  // ...
});

// Find all users
users.find().toArray((err, users) => {
  // ...
});

// Update a user
users.updateOne({ username: 'johndoe' }, { $set: { password: '5678' } }, (err, result) => {
  // ...
});

// Delete a user
users.deleteOne({ username: 'johndoe' }, (err, result) => {
  // ...
});

In this example, we create a users collection object, insert a new user into the collection, find all the users in the collection, update a user's password, and delete a user from the collection.

Conclusion

In this guide, we've seen how to use the MongoDB npm package to interact with a MongoDB database both from your Node.js code and from the command line. By using the simple and intuitive interface provided by the package, you can easily perform CRUD operations on your databases and collections, making MongoDB an ideal choice for your Node.js applications.