From 11606fa023fc07ccf302b3337472f3adb698a05c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Thu, 21 Jan 2010 20:49:11 +0100
Subject: [PATCH] Add __contains__ to EvalEnvironment It is used in
 _get_on_change_args

---
 tryton/gui/window/view_form/model/record.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tryton/gui/window/view_form/model/record.py b/tryton/gui/window/view_form/model/record.py
index 5b08b45406..23e0678329 100644
--- a/tryton/gui/window/view_form/model/record.py
+++ b/tryton/gui/window/view_form/model/record.py
@@ -42,6 +42,9 @@ class EvalEnvironment(dict):
 
     __repr__ = __str__
 
+    def __contains__(self, item):
+        return item in self.parent.mgroup.mfields
+
 
 class ModelRecord(SignalEvent):