Rails vs Django vs Express comparison - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a new Rails controller named 'PostsController'.

Ruby on Rails

class PostsController < [1]
  def index
    # code here
  end
end

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

AApplicationController

BBaseController

CMainController

DRootController

Attempts:

3 left

💡 Hint

Common Mistakes

Using a non-existent base controller like BaseController.

In Rails, controllers inherit from ApplicationController to get default behavior.

2fill in blank

medium

Complete the code to define a Django view function that returns a simple HTTP response.

Ruby on Rails

from django.http import HttpResponse

def hello(request):
    return [1]('Hello, Django!')

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

AHttpRequest

BHttpView

CHttpResponse

DHttpServer

Attempts:

3 left

💡 Hint

Common Mistakes

Using HttpRequest instead of HttpResponse.

Django views return an HttpResponse object to send content back to the browser.

3fill in blank

hard

Fix the error in this Express.js route handler to send a JSON response.

Ruby on Rails

app.get('/api/data', (req, res) => {
  res.[1]({ message: 'Hello from Express!' });
});

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

AsendJson

Bjson

CsendText

DsendResponse

Attempts:

3 left

💡 Hint

Common Mistakes

Using non-existent methods like sendJson or sendText.

Express uses res.json() to send a JSON response to the client.

4fill in blank

hard

Fill both blanks to create a Rails route that maps GET requests for '/articles' to the 'index' action of 'ArticlesController'.

Ruby on Rails

Rails.application.routes.draw do
  [1] '[2]', to: 'articles#index'
end

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

Aget

Bpost

Cput

Darticles

Attempts:

3 left

💡 Hint

Common Mistakes

Using POST or PUT instead of GET for reading data.

In Rails, get defines a route for GET requests. The path is '/articles'.

5fill in blank

hard

Fill all three blanks to create an Express.js middleware that logs the request method and URL, then calls next middleware.

Ruby on Rails

app.use(([1], [2], [3]) => {
  console.log(`$[1].method } $[1].url`);
  [3]();
});

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

Areq

Bres

Cnext

Drequest

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing parameter names or forgetting to call next().

Express middleware functions receive req, res, and next as parameters. Logging uses req.method and req.url. Calling next() passes control to the next middleware.