Prevent error when anonymous user requests allergies

().py

@@ -0,0 +1,12 @@
+# coding: utf-8
+Membership.objects.all()
+Membership.objects.filter(user=1)
+Membership.objects.filter(user="test1")
+User.objects.get(username="test1")
+Event.objects.get(created_by=1)
+Event.objects.all()
+Event.objects.get(created_by_id=1)
+Event.objects.get(created_by_id=3)
+Event.objects.filter(created_by_id=3)
+User.objects.get(username="webkom")
+User.objects.get(username="webkom").delete(force=True)

lego/apps/events/models.py

@@ -134,6 +134,8 @@ def user_should_see_regs(self, user: User) -> bool:
         )
 
     def user_should_see_allergies(self, user: User) -> bool:
+        if user.is_anonymous:
+            return False
         memberships = Membership.objects.filter(user=user)
         in_responsible_group = self.responsible_group in [
             mem.abakus_group for mem in memberships