Adding additional actions to ViewSets

You can add extra actions to ViewSets. Let’s change the CourseEnrollView view into a custom ViewSet action. Edit the api/views.py file and modify the CourseViewSet class to look as follows:

# ...
from rest_framework.decorators import action
class CourseViewSet(viewsets.ReadOnlyModelViewSet):
    queryset = Course.objects.prefetch_related('modules')
    serializer_class = CourseSerializer
    @action(
        detail=True,
        methods=['post'],
        authentication_classes=[BasicAuthentication],
        permission_classes=[IsAuthenticated]
    )
    def enroll(self, request, *args, **kwargs):
        course = self.get_object()
        course.students.add(request.user)
        return Response({'enrolled': True})

In the preceding code, you add a custom enroll() method that represents an additional action for this ViewSet. The preceding code is as follows:

1. You use the action decorator of...