Release

lectures/models.py

@@ -182,7 +182,7 @@ class Lecture(NameStrMixin, models.Model):
             return LectureGroupType.objects.filter(
                 lecture=self,
                 group__in=(
-                    LectureGroup.filter(
+                    LectureGroup.objects.filter(
                         models.Q(user_groups__in=request.user.groups.all())
                         if not request.user.is_superuser
                         else models.Q(id__isnull=False)  # Always True