--- versionedFile/extVersionedFile.py	2008/06/26 18:01:05	1.21
+++ versionedFile/extVersionedFile.py	2008/08/08 16:19:26	1.25
@@ -613,6 +613,13 @@ class extVersionedFileObject(ExtFile):
         self.time = time
         self.author = author
 
+    security.declareProtected('manage','changeObject')
+    def changeObject(self,**args):
+        """modify any of the objects attributes"""
+        for arg in args:
+            if hasattr(self, arg):
+                logging.debug("changeObject %s: %s=%s"%(repr(self),arg,args[arg]))
+                setattr(self, arg, args[arg])
 
     security.declarePublic('getTitle')
     def getTitle(self):
@@ -790,6 +797,8 @@ class extVersionedFile(CatalogAware,Fold
         self.id=id
         self.title=title
         self.lockedBy=lockedBy
+        if self.lockedBy is None:
+            self.lockedBy = ''
         self.author=author
         self.lastVersionNumber=0
         self.lastVersionId=None
@@ -889,6 +898,8 @@ class extVersionedFile(CatalogAware,Fold
     
     def getLockedBy(self):
         """get locked by"""
+        if self.lockedBy is None:
+            self.lockedBy = ''
         return str(self.lockedBy)
     
     def getLastVersionNumber(self):