def save_model(self, request, abstract_category, form, change):
workgroups = []
if not abstract_category.pk and not request.user.is_superuser:
workgroups = request_workgroups(request)
abstract_category.save()
relation = WORKGROUP_RELATIONS[self.model]
for workgroup in workgroups:
getattr(workgroup, relation).add(abstract_category)