Creating CRUD Operations Using NodeJS, Express JS and MongoDB

Backend Development with Javascript

When it comes to building powerful and scalable web applications, a strong backend is essential. NodeJS, Express JS, and MongoDB are popular tools amongst developers for building the backend of web applications. In this article, we will explore how to create CRUD (Create, Read, Update, Delete) operations using these technologies.

NodeJS

NodeJS is a runtime environment that allows developers to run JavaScript code on the server side. It provides a non-blocking, event-driven architecture that makes it lightweight and efficient for building server-side applications. With NodeJS, you can easily create APIs and handle requests from clients.

Express JS

Express JS is a minimal and flexible NodeJS web application framework that provides a robust set of features to build web and mobile applications. It simplifies the process of creating APIs and handling HTTP requests by providing a simple and easy-to-use interface. Express JS is widely used for building RESTful APIs and web applications.

MongoDB

MongoDB is a popular, open-source, document-oriented database that provides high performance, scalability, and flexibility. It stores data in flexible, JSON-like documents, making it easy to work with data in a JavaScript environment. MongoDB is a great choice for building the backend of web applications due to its ability to handle large amounts of data and its powerful query language.

Creating CRUD Operations

To create CRUD operations using NodeJS, Express JS, and MongoDB, you will first need to set up a NodeJS project and install the necessary dependencies using NPM. You can then use Express JS to create routes for handling CRUD operations and MongoDB to store and retrieve data.

Here is an example of how to create a simple CRUD API using these technologies:

“`javascript
// Require necessary modules
const express = require(‘express’);
const mongoose = require(‘mongoose’);

// Create Express application
const app = express();

// Connect to MongoDB
mongoose.connect(‘mongodb://localhost:27017/myapp’, { useNewUrlParser: true, useUnifiedTopology: true });

// Create a mongoose model
const Item = mongoose.model(‘Item’, new mongoose.Schema({
name: String
}));

// Create a route for creating an item
app.post(‘/items’, async (req, res) => {
const { name } = req.body;
const newItem = new Item({ name });
await newItem.save();
res.json(newItem);
});

// Create a route for reading all items
app.get(‘/items’, async (req, res) => {
const items = await Item.find();
res.json(items);
});

// Create a route for updating an item
app.put(‘/items/:id’, async (req, res) => {
const { id } = req.params;
const { name } = req.body;
const updatedItem = await Item.findByIdAndUpdate(id, { name }, { new: true });
res.json(updatedItem);
});

// Create a route for deleting an item
app.delete(‘/items/:id’, async (req, res) => {
const { id } = req.params;
await Item.findByIdAndDelete(id);
res.json({ message: ‘Item deleted’ });
});

// Start the server
const PORT = 3000;
app.listen(PORT, () => {
console.log(`Server running on port ${PORT}`);
});
“`

This is a basic example of how to create CRUD operations using NodeJS, Express JS, and MongoDB. With this setup, you can create, read, update, and delete items in a MongoDB database using HTTP requests.

Conclusion

NodeJS, Express JS, and MongoDB are powerful tools for building the backend of web applications. By using these technologies, you can create robust and scalable web applications with ease. With the example provided in this article, you can now create CRUD operations using NodeJS, Express JS, and MongoDB.