+ def get_queryset(self):
+ qs = Book.objects.filter(preview=True)
+ # FIXME: temporary workaround for a problem with iOS app; see #3954.
+ if 'Darwin' in self.request.META.get('HTTP_USER_AGENT', '') and 'debug' not in self.request.GET:
+ qs = qs.none()
+ return qs
+