Ticket #1301: query.py.diff

django/db/models/query.py

@@ -429 +429 @@
         # objects -- MySQL returns the values as strings, instead.
         return [typecast_timestamp(str(row[0])) for row in cursor.fetchall()]
 
+    def _clone(self, klass=None, **kwargs):
+        c = super(DateQuerySet, self)._clone(klass, **kwargs)
+        c._field = self._field
+        c._kind = self._kind
+        c._order = self._order
+        return c
+
 class QOperator:
     "Base class for QAnd and QOr"
     def __init__(self, *args):