From 792dfefc8281fd7e1818d88bc2ba3384ce1f484c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Tue, 3 Nov 2009 15:19:46 +0100
Subject: [PATCH] Don't convert Date and DateTime into string

---
 trytond/backend/fields.py | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/trytond/backend/fields.py b/trytond/backend/fields.py
index bc0febeabe..513fe6ce4d 100644
--- a/trytond/backend/fields.py
+++ b/trytond/backend/fields.py
@@ -76,11 +76,17 @@ class Numeric(Float):
 
 
 class Date(Field):
-    pass
+
+    @staticmethod
+    def sql_format(value):
+        return value or None
 
 
 class DateTime(Field):
-    pass
+
+    @staticmethod
+    def sql_format(value):
+        return value or None
 
 
 class Time(Field):