Custom permissions in Django - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a custom permission in Django REST Framework?

A custom permission is a way to define your own rules to control who can access or modify API views beyond the built-in permissions.

beginner

Which method must be implemented when creating a custom permission class in Django REST Framework?

You must implement the has_permission(self, request, view) method to check if the request should be allowed.

beginner

How do you apply a custom permission to a Django REST Framework view?

You add the custom permission class to the view's <code>permission_classes</code> list, for example: <code>permission_classes = [MyCustomPermission]</code>.

intermediate

What is the difference between has_permission and has_object_permission in custom permissions?

has_permission checks general access before the view runs, while has_object_permission checks access for a specific object instance.

intermediate

Why use custom permissions instead of just checking user roles inside views?

Custom permissions keep access logic separate and reusable, making code cleaner and easier to maintain.

Which base class should you extend to create a custom permission in Django REST Framework?

A rest_framework.views.APIView

B django.views.View

C rest_framework.permissions.BasePermission

D django.contrib.auth.models.Permission

Custom permissions extend BasePermission to define access rules.

What does the has_permission method receive as arguments?

A request and object

B request and view

C view and object

D request only

has_permission(self, request, view) receives the request and the view being accessed.

If you want to check permissions on a specific object, which method should you override?

A has_object_permission

B has_permission

C check_permission

D get_permission

has_object_permission is used to check permissions for individual objects.

How do you apply multiple permissions to a view?

A List all permission classes in <code>permission_classes</code> list

B Use only the first permission class

C Add permissions in the URL config

D Set permissions in the model

You list all permission classes in the permission_classes attribute of the view.

What happens if a custom permission's has_permission returns False?

A The request proceeds normally

B An error is raised

C The user is redirected to login

D Access is denied and a 403 Forbidden response is returned

Returning False denies access with a 403 Forbidden response.

Explain how to create and use a custom permission in Django REST Framework.

Think about the class you extend and the methods you override.

Why is it beneficial to separate permission logic into custom permission classes instead of checking permissions inside views?

Consider how separation of concerns helps in programming.