Add better handling for missing groups

gnuviechadmin/hostingpackages/models.py

@@ -5,6 +5,7 @@ This module contains the hosting package models.
 from __future__ import absolute_import
 
 from django.conf import settings
+from django.core.exceptions import ImproperlyConfigured
 from django.db import models, transaction
 from django.urls import reverse
 from django.utils.translation import gettext_lazy as _
@@ -370,9 +371,14 @@ class CustomerHostingPackage(HostingPackageBase):
             self.copy_template_attributes()
             self.osuser = OsUser.objects.create_user(self.customer)
             for group in settings.OSUSER_DEFAULT_GROUPS:
-                AdditionalGroup.objects.create(
-                    user=self.osuser, group=Group.objects.get(groupname=group)
-                )
+                try:
+                    AdditionalGroup.objects.create(
+                        user=self.osuser, group=Group.objects.get(groupname=group)
+                    )
+                except Group.DoesNotExist as e:
+                    raise ImproperlyConfigured(
+                        f"group {group} has not been defined"
+                    ) from e
         return super(CustomerHostingPackage, self).save(*args, **kwargs)