Creating REST API routes in Node.js

Hi folks, in the part 1 blog I shared the steps for setting and running up the node.js port. Today I want to continue this journey by creating routes. I choose the Todos app for which I'll write Create, Read, Update, and Delete (CRUD) todos APIs.

For this series, I'm following an excellent video tutorial from Traversy Media

Table Of Contents

• Create todosController
• Create a routes file
• Connect route in server.js file

Create todosController

Create a backend folder in your project and add a controllers folder in it.
All the features logic will go here with separate controller files. So now I'll add a todosController.js file and create simple CRUD functions.

const getTodos = (req, res) => {
  res.status(200).json({message: 'Get todos'})
}

const setTodo = (req, res) => {
  res.status(200).json({message: 'Set todo'})
}

const updateTodo = (req, res) => {
  res.status(200).json({message: `Update todo ${req.params.id}`})
}

const deleteTodo = (req, res) => {
  res.status(200).json({message: `Delete todo ${req.params.id}`})
}

module.exports = {
  getTodos,
  setTodo,
  updateTodo,
  deleteTodo
}

I'll get the id in the query param for update and delete todo API. I am just returning a static JSON message right now. I'll later replace it with the actual code.

Create a routes file

So now I'll add a todoRoutes.js file inside /backend/routes folder and initialize the router in it.

const express = require('express');
const router = express.Router();
const {getTodos, setTodo, updateTodo, deleteTodo} = require('../controllers/todosController')

router.route('/').get(getTodos).post(setTodo)
router.route('/:id').put(updateTodo).delete(deleteTodo)

module.exports = router;

Connect route in server.js file

And in server.js file, I'll use this route like that

...
// add these lines to accept req body for POST call
app.use(express.json())
app.use(express.urlencoded({extended: false}))

app.use('/api/todos', require('./routes/todoRoutes'))
app.listen(port, () => {
...

P.S. Move your server.js file inside the backend folder. I didn't do it in the previous blog.

Now run the server and go to the postman and check your first route. It will give a result like this.

• GET
  

• POST
  

• PUT
  

• DELETE
  

In the next blog, I'll connect the project with MongoDB and write the logic to add, update, delete and get todos.

Thank you for reading!
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