[Zope-Checkins] CVS: Zope/lib/python/OFS - PropertySheets.py:1.81.4.1

[Andreas Jung]

Update of /cvs-repository/Zope/lib/python/OFS
In directory cvs.zope.org:/tmp/cvs-serv26984/lib/python/OFS

Modified Files:
      Tag: Zope-2_5-branch
	PropertySheets.py 
Log Message:

      - Propertysheets: Ids like 'values','keys' and 'values' are
        now forbidden as they break WebDAV functionality. Existing
        Propertysheets are not affected


=== Zope/lib/python/OFS/PropertySheets.py 1.81 => 1.81.4.1 ===
         )
 
+    __reserved_ids= ('values','items') 
+
     def property_extensible_schema__(self):
         """Return a flag indicating whether new properties may be
         added or removed."""
@@ -116,6 +118,11 @@
         # Create a new property set, using the given id and namespace
         # string. The namespace string should be usable as an xml name-
         # space identifier.
+
+        if id in self.__reserved_ids:
+            raise ValueError, "'%s' is a reserved Id (forbidden Ids are: %s)" % \
+                    (id, self.__reserved_ids)
+
         self.id=id
         self._md=md or {}