removing empty update exception

cqlengine/query.py

@@ -756,7 +756,7 @@ class ModelQuerySet(AbstractQuerySet):
     def update(self, **values):
         """ Updates the rows in this queryset """
         if not values:
-            raise ValidationError("At least one column needs to be updated")
+            return
 
         set_statements = []
         ctx = {}

cqlengine/tests/query/test_updates.py

@@ -1,5 +1,6 @@
 from uuid import uuid4
 from cqlengine.exceptions import ValidationError
+from cqlengine.query import QueryException
 
 from cqlengine.tests.base import BaseCassEngTestCase
 from cqlengine.models import Model
@@ -62,11 +63,6 @@ class QueryUpdateTests(BaseCassEngTestCase):
         with self.assertRaises(ValidationError):
             TestQueryUpdateModel.objects(partition=partition, cluster=3).update(count='asdf')
 
-    def test_update_with_no_values_failure(self):
-        """ tests calling update on models with no values passed in """
-        with self.assertRaises(ValidationError):
-            TestQueryUpdateModel.objects(partition=uuid4(), cluster=3).update()
-
     def test_invalid_update_kwarg(self):
         """ tests that passing in a kwarg to the update method that isn't a column will fail """
         with self.assertRaises(ValidationError):