Backend Core Development

Instructions

1. Routing

   • Define RESTful API routes
   • Use proper HTTP methods (GET, POST, PUT, DELETE)
   • Organize routes by feature or resource

2. Request & Response Handling

   • Validate incoming requests
   • Parse request body, params, and query strings
   • Send structured JSON responses
   • Handle success and error responses properly

3. Database Connection

   • Connect to database securely
   • Use environment variables for credentials
   • Perform CRUD operations
   • Handle connection errors gracefully

4. Error Handling

   • Centralized error handling
   • Meaningful status codes
   • Clear error messages

Best Practices

• Follow REST API conventions
• Keep controllers thin and reusable
• Never expose sensitive data
• Use async/await for database operations
• Separate routes, controllers, and services
• Validate data before DB operations

Example Structure

// routes/user.routes.js
import express from "express";
import { createUser, getUsers } from "../controllers/user.controller.js";

const router = express.Router();

router.post("/users", createUser);
router.get("/users", getUsers);

export default router;