Here’s a step-by-step guide on how to create such an API: ## <br>Step 1: Setting Up the Project **1. Initialize a Node.js project**: ```bash mkdir books-api cd books-api npm init -y ``` ### 2. Install necessary packages: ```bash npm install express mongoose body-parser ``` ## <br>Step 2: Create the Basic Server **1. Create the server file**: Create a file named **server.js**: ```js const express = require('express'); const mongoose = require('mongoose'); const bodyParser = require('body-parser'); const app = express(); const PORT = process.env.PORT || 3000; // Middleware app.use(bodyParser.json()); // Database connection mongoose.connect('mongodb://localhost:27017/booksdb', { useNewUrlParser: true, useUnifiedTopology: true }); const db = mongoose.connection; db.on('error', console.error.bind(console, 'connection error:')); db.once('open', () => { console.log('Connected to the database'); }); app.listen(PORT, () => { console.log(`Server is running on port ${PORT}`); }); ``` ## <br>Step 3: Define the Book Model **1. Create a models directory and a Book.js file inside it**: ```js const mongoose = require('mongoose'); const bookSchema = new mongoose.Schema({ title: { type: String, required: true }, author: { type: String, required: true }, publishedDate: { type: Date, required: true }, pages: { type: Number, required: true }, genre: { type: String, required: true } }); module.exports = mongoose.model('Book', bookSchema); ``` ## <br>Step 4: Create Routes for CRUD Operations **1. Create a routes directory and a books.js file inside it**: ```js const express = require('express'); const router = express.Router(); const Book = require('../models/Book'); // Create a new book router.post('/', async (req, res) => { const book = new Book({ title: req.body.title, author: req.body.author, publishedDate: req.body.publishedDate, pages: req.body.pages, genre: req.body.genre }); try { const newBook = await book.save(); res.status(201).json(newBook); } catch (err) { res.status(400).json({ message: err.message }); } }); // Get all books router.get('/', async (req, res) => { try { const books = await Book.find(); res.json(books); } catch (err) { res.status(500).json({ message: err.message }); } }); // Get a single book by ID router.get('/:id', getBook, (req, res) => { res.json(res.book); }); // Update a book router.patch('/:id', getBook, async (req, res) => { if (req.body.title != null) { res.book.title = req.body.title; } if (req.body.author != null) { res.book.author = req.body.author; } if (req.body.publishedDate != null) { res.book.publishedDate = req.body.publishedDate; } if (req.body.pages != null) { res.book.pages = req.body.pages; } if (req.body.genre != null) { res.book.genre = req.body.genre; } try { const updatedBook = await res.book.save(); res.json(updatedBook); } catch (err) { res.status(400).json({ message: err.message }); } }); // Delete a book router.delete('/:id', getBook, async (req, res) => { try { await res.book.remove(); res.json({ message: 'Deleted Book' }); } catch (err) { res.status(500).json({ message: err.message }); } }); // Middleware function to get a book by ID async function getBook(req, res, next) { let book; try { book = await Book.findById(req.params.id); if (book == null) { return res.status(404).json({ message: 'Cannot find book' }); } } catch (err) { return res.status(500).json({ message: err.message }); } res.book = book; next(); } module.exports = router; ``` ## <br>Step 5: Integrate Routes with the Server **1. Update server.js to use the routes**: ```js const express = require('express'); const mongoose = require('mongoose'); const bodyParser = require('body-parser'); const bookRoutes = require('./routes/books'); const app = express(); const PORT = process.env.PORT || 3000; // Middleware app.use(bodyParser.json()); // Database connection mongoose.connect('mongodb://localhost:27017/booksdb', { useNewUrlParser: true, useUnifiedTopology: true }); const db = mongoose.connection; db.on('error', console.error.bind(console, 'connection error:')); db.once('open', () => { console.log('Connected to the database'); }); // Routes app.use('/api/books', bookRoutes); app.listen(PORT, () => { console.log(`Server is running on port ${PORT}`); }); ``` ## <br>Step 6: Testing the API You can test the API using tools like Postman or curl. **Examples**: + Create a book: ```bash curl -X POST -H "Content-Type: application/json" -d '{"title":"Book Title","author":"Author Name","publishedDate":"2023-06-14","pages":300,"genre":"Fiction"}' http://localhost:3000/api/books ``` + Get all books: ```bash curl http://localhost:3000/api/books ``` + Get a single book by ID: ```bash curl http://localhost:3000/api/books/<book_id> ``` + Update a book: ```bash curl -X PATCH -H "Content-Type: application/json" -d '{"title":"Updated Title"}' http://localhost:3000/api/books/<book_id> ``` + Delete a book: ```bash curl -X DELETE http://localhost:3000/api/books/<book_id> ``` This setup provides a basic RESTful API for managing books. You can further enhance it by adding features like authentication, validation, and more. Let me know in the comments what results you achieved. Thank you