Redirects with redirect function in Django - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the redirect() function do in Django?

The redirect() function sends the user to a different URL or view. It tells the browser to load a new page instead of the current one.

beginner

How do you use redirect() to send a user to a URL named 'home'?

You use redirect('home'). This tells Django to find the URL linked to the name 'home' and send the user there.

intermediate

Can redirect() accept a model instance as an argument? What happens?

Yes. If you pass a model instance, Django will call its get_absolute_url() method and redirect to that URL.

intermediate

What HTTP status code does redirect() send by default?

It sends a 302 status code, which means 'Found' and tells the browser to temporarily redirect to another URL.

beginner

How can you redirect to an absolute URL using redirect()?

You can pass the full URL string to redirect(), like redirect('https://example.com'), and Django will send the user there.

What argument types can the redirect() function accept in Django?

A URL name, absolute URL string, or model instance

B Only absolute URL strings

C Only URL names

D Only model instances

The redirect() function can accept a URL name, an absolute URL string, or a model instance with a get_absolute_url() method.

What HTTP status code does Django's redirect() send by default?

A 200

B 301

C 302

D 404

By default, redirect() sends a 302 status code, indicating a temporary redirect.

Which Django function would you use to send a user to a different page?

A redirect()

B get_object_or_404()

C render()

D reverse()

redirect() is used to send users to a different URL or view.

If you pass a model instance to redirect(), what method does Django call to get the URL?

A get_url()

B get_absolute_url()

C get_redirect_url()

D get_path()

Django calls the model's get_absolute_url() method to find the URL to redirect to.

How do you redirect to a named URL pattern called 'dashboard'?

A redirect('/dashboard')

B redirect(url='dashboard')

C redirect(reverse('dashboard'))

D redirect('dashboard')

You can pass the URL name directly to redirect() like redirect('dashboard').

Explain how the redirect() function works in Django and when you would use it.

Think about how websites send you to new pages after actions.

Describe how Django handles a model instance passed to redirect().

Models can tell Django their own URL.

Practice

1. What does the Django redirect function do in a view?

easy

A. It saves data to the database before showing a page.

B. It sends the user to a different URL or view automatically.

C. It stops the server from responding to the request.

D. It renders a template without changing the URL.

Solution

1. Step 1: Understand the purpose of redirect

   The redirect function is used to send users to another page automatically, changing the URL in the browser.

2. Step 2: Compare with other options

   Rendering a template does not change the URL, stopping the server or saving data are unrelated to redirect.

3. Final Answer:

   It sends the user to a different URL or view automatically. -> Option B

4. Quick Check:

   Redirect = automatic URL change [OK]

Hint: Redirect changes URL and sends user to another page [OK]

Common Mistakes:

• Confusing redirect with render which does not change URL
• Thinking redirect saves data automatically
• Assuming redirect stops server response

2. Which of the following is the correct way to use redirect to send a user to a URL path '/home/'?

easy

A. redirect('/home/')

B. return redirect url('/home/')

C. return redirect('/home/')

D. return redirect('/home')()

Solution

1. Step 1: Check the syntax of redirect usage

   The redirect function must be returned from the view with the URL path as a string argument.

2. Step 2: Identify correct syntax

   Only return redirect('/home/') correctly calls redirect and returns the response.

3. Final Answer:

   return redirect('/home/') -> Option C

4. Quick Check:

   Use return with redirect and URL string [OK]

Hint: Always use return with redirect and pass URL as string [OK]

Common Mistakes:

• Forgetting to return the redirect response
• Calling redirect without return
• Adding extra parentheses or wrong syntax

3. What will happen when this Django view runs?

from django.shortcuts import redirect

def my_view(request):
    return redirect('home')

Assuming 'home' is a valid URL pattern name.

medium

A. The user will be redirected to the URL linked to the 'home' view name.

B. The view will raise an error because 'home' is not a URL path.

C. The view will render a template named 'home'.

D. Nothing happens; the redirect function does not work with names.

Solution

1. Step 1: Understand redirect with view name

   Redirect can accept a URL pattern name and will find the URL linked to that name.

2. Step 2: Confirm behavior

   Since 'home' is a valid URL name, redirect sends user to that URL automatically.

3. Final Answer:

   The user will be redirected to the URL linked to the 'home' view name. -> Option A

4. Quick Check:

   redirect('view_name') sends user to that URL [OK]

Hint: redirect accepts URL names, not just paths [OK]

Common Mistakes:

• Thinking redirect only works with URL paths
• Confusing redirect with render for templates
• Assuming redirect needs full URL string

4. Identify the error in this Django view using redirect:

from django.shortcuts import redirect

def go_home(request):
    redirect('/home/')

medium

A. Missing return statement before redirect call.

B. Redirect function does not accept string paths.

C. The URL path should not start with a slash.

D. The import statement is incorrect.

Solution

1. Step 1: Check the redirect usage in the view

   The redirect function must be returned to send the HTTP response properly.

2. Step 2: Identify missing return

   Here, redirect is called but not returned, so the view returns None and does not redirect.

3. Final Answer:

   Missing return statement before redirect call. -> Option A

4. Quick Check:

   Always return redirect response [OK]

Hint: Always return redirect, don't just call it [OK]

Common Mistakes:

• Calling redirect without return
• Thinking redirect needs special URL format
• Incorrect import statements

5. You want to redirect a user to a detail page of a model instance post in Django. Which is the correct way to use redirect?

hard

A. return redirect('/post/' + post.id)

B. return redirect('post_detail', id=post.id)

C. return redirect(post)

D. return redirect('post_detail', pk=post.id)

Solution

1. Step 1: Understand redirect with model instance and URL parameters

   Redirect can accept a view name with keyword arguments matching URL parameters.

2. Step 2: Analyze options

   return redirect(post) passes the model instance directly, which works only if the model has a get_absolute_url method. return redirect('post_detail', id=post.id) uses incorrect keyword 'id'; typical patterns use 'pk', causing NoReverseMatch. return redirect('post_detail', pk=post.id) correctly passes the view name and keyword argument 'pk' matching typical URL patterns. return redirect('/post/' + post.id) tries to concatenate string and int without conversion, causing error.

3. Final Answer:

   return redirect('post_detail', pk=post.id) -> Option D

4. Quick Check:

   Use redirect with view name and keyword args [OK]

Hint: Use redirect with view name and keyword args for model pages [OK]

Common Mistakes:

• Passing model instance without get_absolute_url method
• Using incorrect keyword arg name like 'id' instead of 'pk'
• Concatenating string and int without conversion