From 36b964fc8e5cb7d5478d3255bab7486f5d71978c Mon Sep 17 00:00:00 2001
From: helmutm <helmutm@fd906abe-77d9-0310-91a1-e0d9ade77398>
Date: Wed, 10 Feb 2010 11:43:48 +0000
Subject: [PATCH] make dynamic default field more fault tolerant

git-svn-id: svn://svn.cy55.de/Zope3/src/cybertools/trunk@3726 fd906abe-77d9-0310-91a1-e0d9ade77398
---
 composer/schema/field.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/composer/schema/field.py b/composer/schema/field.py
index 0a90b8a..f5a5551 100644
--- a/composer/schema/field.py
+++ b/composer/schema/field.py
@@ -91,7 +91,10 @@ class Field(Component):
         if self.defaultValueType == 'tales':
             expr = Engine.compile(self.default)
             ctx = Context(Engine, self.getContextProperties())
-            return expr(ctx)
+            try:
+                return expr(ctx)
+            except AttributeError, KeyError:
+                return u''
         return self.default
     def setDefaultValue(self, value):
         self.default = value