Fixes #169: Fallback to cancel_url if object is missing get_absolute_url()

netbox/utilities/views.py

@@ -120,7 +120,7 @@ class ObjectEditView(View):
             'obj': obj,
             'obj_type': self.model._meta.verbose_name,
             'form': form,
-            'cancel_url': obj.get_absolute_url() if obj else reverse(self.cancel_url),
+            'cancel_url': obj.get_absolute_url() if hasattr(obj, 'get_absolute_url') else reverse(self.cancel_url),
         })
 
     def post(self, request, *args, **kwargs):
@@ -157,7 +157,7 @@ class ObjectEditView(View):
             'obj': obj,
             'obj_type': self.model._meta.verbose_name,
             'form': form,
-            'cancel_url': obj.get_absolute_url() if obj else reverse(self.cancel_url),
+            'cancel_url': obj.get_absolute_url() if hasattr(obj, 'get_absolute_url') else reverse(self.cancel_url),
         })