diff -r da2f0d5221d8 -r 509e30b9f5c9 web/ldt/ldt_utils/utils.py
--- a/web/ldt/ldt_utils/utils.py	Fri Aug 27 08:25:18 2010 +0200
+++ b/web/ldt/ldt_utils/utils.py	Wed Sep 01 09:50:05 2010 +0200
@@ -14,6 +14,23 @@
 import Ft
 import lxml.etree
 
+__BOOLEAN_DICT = {
+    'false':False,
+    'true':True,
+    '0':False,
+    '1':True,
+    't': True,
+    'f':False
+}
+
+def boolean_convert(bool):
+    if bool is None:
+        return False
+    if bool is True or bool is False:
+        return bool
+    key = str(bool).lower()
+    return __BOOLEAN_DICT.get(key, False)
+
 class LdtSearch(object):
 
     def query(self, field, query):