Logout view in Django - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ component_behavior

intermediate

What happens after calling Django's logout() function in a view?

Consider a Django view that calls logout(request). What is the state of request.user immediately after this call?

Django

from django.contrib.auth import logout

def logout_view(request):
    logout(request)
    user_after_logout = request.user
    return user_after_logout.is_authenticated

A request.user is an AnonymousUser and is_authenticated is False

B request.user remains the same as before logout and is_authenticated is True

C request.user is None and accessing is_authenticated raises AttributeError

D request.user is a User instance but is_authenticated is False

💡 Hint

Think about what Django does to the user session after logout.

After calling logout(request), Django replaces request.user with an AnonymousUser instance. This user is not authenticated, so is_authenticated returns False.

📝 Syntax

intermediate

Which Django logout view code snippet correctly logs out a user and redirects to home?

Choose the code snippet that correctly logs out the user and redirects to the home page ('/') using Django's built-in functions.

A

from django.contrib.auth import logout
from django.shortcuts import redirect

def logout_view(request):
    logout(request)
    return redirect('/')

B

from django.contrib.auth import logout
from django.shortcuts import redirect

def logout_view(request):
    logout(request)
    return redirect(request.path)

C

from django.contrib.auth import logout
from django.shortcuts import redirect

def logout_view(request):
    logout(request)
    return redirect('home')

D

from django.contrib.auth import logout
from django.http import HttpResponseRedirect

def logout_view(request):
    logout()
    return HttpResponseRedirect('/')

💡 Hint

Check the logout function call and the redirect target.

Option A correctly calls logout(request) with the request argument and redirects to the root URL '/'. Option A misses the request argument in logout. Option A redirects to 'home' which may not be defined. Option A redirects back to the same page, not home.

🔧 Debug

advanced

Why does this logout view raise an error?

Given this Django logout view, why does it raise a TypeError?

Django

from django.contrib.auth import logout
from django.shortcuts import redirect

def logout_view(request):
    logout()
    return redirect('/')

A The view lacks a return statement, causing a TypeError

B logout() is called without the required request argument, causing a TypeError

C redirect('/') is invalid because '/' is not a named URL pattern

D logout() returns a value that cannot be used with redirect()

💡 Hint

Check the function call signature for logout.

The logout function requires the request argument. Calling logout() without arguments raises a TypeError.

❓ state_output

advanced

What is the session state after logout in Django?

After calling logout(request) in a Django view, what happens to the session data?

Django

from django.contrib.auth import logout

def logout_view(request):
    request.session['key'] = 'value'
    logout(request)
    session_keys = list(request.session.keys())
    return session_keys

A The session keys are reset to default Django keys but 'key' remains

B The session retains all keys including 'key', so session_keys contains ['key']

C The session raises a KeyError when accessing keys after logout

D The session is flushed and session_keys is an empty list

💡 Hint

Think about what logout does to the session data.

Django's logout(request) flushes the session data, removing all keys. Thus, request.session.keys() is empty after logout.

🧠 Conceptual

expert

Which statement about Django's logout view behavior is true?

Choose the correct statement about what Django's logout(request) function does internally.

A It invalidates the user’s password to prevent further logins until reset

B It only sets request.user to None but keeps session data intact

C It deletes the user’s session data and sets request.user to AnonymousUser

D It redirects the user automatically to the login page after logout

💡 Hint

Consider what happens to session and user state after logout.

Django's logout(request) clears the session data and replaces request.user with an AnonymousUser. It does not change passwords or perform redirects automatically.