Why sessions matter in Django - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the session middleware in Django settings.

Django

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    [1],
    'django.middleware.common.CommonMiddleware',
]

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

A'django.middleware.locale.LocaleMiddleware'

B'django.middleware.csrf.CsrfViewMiddleware'

C'django.contrib.sessions.middleware.SessionMiddleware'

D'django.middleware.clickjacking.XFrameOptionsMiddleware'

Attempts:

3 left

💡 Hint

Common Mistakes

Using CSRF middleware instead of session middleware

Forgetting to include session middleware in settings

The SessionMiddleware enables session support in Django. It must be included in the MIDDLEWARE list.

2fill in blank

medium

Complete the code to set a session variable in a Django view.

Django

def my_view(request):
    request.session[[1]] = 'blue'
    return HttpResponse('Color set')

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

A'favorite_color'

B'user_id'

C'session_key'

D'csrf_token'

Attempts:

3 left

💡 Hint

Common Mistakes

Using reserved keys like 'csrf_token'

Using variable names instead of string keys

Session variables are stored as key-value pairs. Here, the key is 'favorite_color'.

3fill in blank

hard

Fix the error in this code to retrieve a session variable safely.

Django

def get_color(request):
    color = request.session.get([1], 'red')
    return HttpResponse(f'Color is {color}')

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

A'favorite_color'

Bfavorite_color

Ccolor

D'color'

Attempts:

3 left

💡 Hint

Common Mistakes

Using variable names without quotes as keys

Forgetting to provide a default value

The key for session.get must be a string, so it needs quotes around it.

4fill in blank

hard

Fill both blanks to check if a session key exists and then delete it.

Django

if [1] in request.session:
    [2] request.session['user_id']

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

A'user_id'

Bdel

Cremove

Ddelete

Attempts:

3 left

💡 Hint

Common Mistakes

Using variable names without quotes as keys

Using incorrect keywords like 'remove' or 'delete' which don't exist in Python

Use 'user_id' to check if the key exists in request.session. Use del request.session['user_id'] to delete it.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that stores word lengths in session if length is greater than 3.

Django

request.session['word_lengths'] = { [1]: len([2]) for [2] in words if len([2]) [3] 3 }

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

Aword

C>

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names in the comprehension

Using '<' instead of '>' for filtering

The comprehension uses 'word' as the key and variable, and filters words with length greater than 3.