fix: user might be None

program/filters.py

@@ -120,7 +120,7 @@ class ShowFilterSet(StaticFilterHelpTextMixin, filters.FilterSet):
     def filter_writable(self, queryset: QuerySet, _: str, value: bool) -> QuerySet:
         user = self.request.user if self.request.user.is_authenticated else None
 
-        if value and (user.is_superuser or user.has_perm("program.update_show")):
+        if value and user and (user.is_superuser or user.has_perm("program.update_show")):
             return queryset
         elif value and user:
             return queryset.filter(owners=user)