support a negative dec operator (#1450)

2016-12-28 02:04:49 -05:00
parent 91dad4060f
commit f4e1d80a87
2 changed files with 6 additions and 2 deletions
--- a/mongoengine/queryset/transform.py
+++ b/mongoengine/queryset/transform.py
@@ -233,8 +233,7 @@ def update(_doc_cls=None, **update):
                # Support decrement by flipping a positive value's sign
                # and using 'inc'
                op = 'inc'
-                if value > 0:
-                    value = -value
+                value = -value
            elif op == 'add_to_set':
                op = 'addToSet'
            elif op == 'set_on_insert':