Controller pattern for route handlers in Express - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the controller module correctly.

Express

const userController = require('[1]');

Drag options to blanks, or click blank then click option'

Arouter

Bexpress

Chttp

D./userController

Attempts:

3 left

💡 Hint

Common Mistakes

Using a package name instead of a local file path.

Forgetting the './' prefix for local files.

The controller module is usually imported from a local file path, like './userController'.

2fill in blank

medium

Complete the code to define a GET route using the controller's method.

Express

router.get('/users', [1].getAllUsers);

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Aapp

BuserController

Crouter

Dexpress

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'app' or 'express' instead of the controller object.

Using 'router' instead of the controller for the handler.

The route handler should call the controller's method, so use 'userController.getAllUsers'.

3fill in blank

hard

Fix the error in the controller method export syntax.

Express

module.exports = { [1]: (req, res) => { res.send('Hello'); } };

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AgetAllUsers

Bexports

Cmodule

Drequire

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'exports' or 'module' as keys instead of method names.

Using 'require' which is for importing, not exporting.

The exported method name should be a valid function name like 'getAllUsers'.

4fill in blank

hard

Fill both blanks to create a POST route and call the correct controller method.

Express

router.[1]('/users', [2].createUser);

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Apost

BuserController

Cget

Dapp

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'get' instead of 'post' for POST routes.

Using 'app' instead of the controller object.

Use 'post' to define a POST route and call the controller's 'createUser' method.

5fill in blank

hard

Fill all three blanks to export the router and import express and the controller correctly.

Express

const express = require('[1]');
const userController = require('[2]');
const router = express.Router();

router.get('/users', userController.getAllUsers);

module.exports = [3];

Drag options to blanks, or click blank then click option'

Aexpress

B./userController

Crouter

Dapp

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'app' instead of 'router' for export.

Forgetting './' in the controller import path.

Import 'express' and the local controller file, then export the 'router' object.