Custom delete in Django

models.py

class FooManager(models.Manager):
    """A manager for foos with custom filter.

    Adds a clause to default query to ignore removed entries.
    """

    def get_queryset(self):
        """Filter out all removed entries by default."""
        return super().get_queryset().filter(removed_at__isnull=True)


class Foo(models.Model):
    """Foo holds information about different foos.
    """
    # ...
    objects = FooManager()

views.py

class FooDeleteView(LoginRequiredMixin, UserPassesTestMixin, DeleteView):
    """List all foos."""
    model = Foo
    success_url = reverse_lazy('foo_list')

    def test_func(self):
        """Check if this foo belongs to the same
        customer as user."""
        return self.request.user.customer == self.get_object().customer

    def delete(self, request, *args, **kwargs):
        self.object = self.get_object()
        success_url = self.get_success_url()
        self.object.removed_at = timezone.now()
        self.object.save()
        return HttpResponseRedirect(success_url)