Fix fields cleaning with unreachable items when…

… object is being created.

kfet/forms.py

@@ -136,6 +136,8 @@ class UserGroupForm(forms.ModelForm):
 
     def clean_groups(self):
         kfet_groups = self.cleaned_data.get('groups')
+        if self.instance.pk is None:
+            return kfet_groups
         other_groups = self.instance.groups.exclude(name__icontains='K-Fêt')
         return list(kfet_groups) + list(other_groups)
 
@@ -173,6 +175,8 @@ class GroupForm(forms.ModelForm):
         # other_groups = self.instance.permissions.difference(
         #     self.fields['permissions'].queryset
         # )
+        if self.instance.pk is None:
+            return kfet_perms
         other_perms = self.instance.permissions.exclude(
             pk__in=[p.pk for p in self.fields['permissions'].queryset],
         )