feat(controller): more info with bad scale operation

Author: Matthew Fisher

controller/api/tests/test_container.py

@@ -307,7 +307,8 @@ def test_container_errors(self):
         response = self.client.post(url, json.dumps(body), content_type='application/json',
                                     HTTP_AUTHORIZATION='token {}'.format(self.token))
         self.assertEqual(response.status_code, 400)
-        self.assertEqual(response.data, {'detail': 'Invalid scaling format'})
+        self.assertEqual(response.data, {'detail': "Invalid scaling format: invalid literal for "
+                                                   "int() with base 10: 'not_an_int'"})
         body = {'invalid': 1}
         response = self.client.post(url, json.dumps(body), content_type='application/json',
                                     HTTP_AUTHORIZATION='token {}'.format(self.token))

controller/api/views.py

@@ -139,8 +139,8 @@ def scale(self, request, **kwargs):
                 new_structure[target] = int(count)
             models.validate_app_structure(new_structure)
             app.scale(request.user, new_structure)
-        except (TypeError, ValueError):
-            return Response({'detail': 'Invalid scaling format'},
+        except (TypeError, ValueError) as e:
+            return Response({'detail': 'Invalid scaling format: {}'.format(e)},
                             status=status.HTTP_400_BAD_REQUEST)
         except (EnvironmentError, ValidationError) as e:
             return Response({'detail': str(e)}, status=status.HTTP_400_BAD_REQUEST)