[JITERA] Add PATCH /books/:id Endpoint for Partial Updates

Created by: chi-jitera

Overview

This pull request introduces a new PATCH /books/:id endpoint to allow partial updates of book records. This change enhances the existing API by enabling clients to update only specific fields of a book without needing to send the entire book object.

Changes Made

1. Updated bookController.js

   • Added a new method patchBook to handle PATCH requests for partial updates.

   exports.patchBook = async (req, res) => {
       try {
           const book = await bookService.patchBook(req.params.id, req.body);
           res.json(book);
       } catch (error) {
           res.status(400).json({ error: error.message });
       }
   };

2. Updated bookRoutes.js

   • Added a new route for the PATCH method to allow partial updates of books.

   router.patch('/books/:id', bookController.patchBook);

3. Updated bookService.js

   • Added a new method patchBook to handle partial updates of book data.

   exports.patchBook = async (bookId, updateData) => {
       const book = await Book.findByIdAndUpdate(bookId, updateData, { new: true, runValidators: true });
       if (!book) throw new Error('Book not found');
       return book;
   };

These changes collectively enable the functionality for partial updates of book records, improving the flexibility of the API.