[Zope3-checkins] CVS: Zope3/lib/python/Zope/App/Traversing - __init__.py:1.12

[Steve Alexander]

Update of /cvs-repository/Zope3/lib/python/Zope/App/Traversing
In directory cvs.zope.org:/tmp/cvs-serv12957/lib/python/Zope/App/Traversing

Modified Files:
	__init__.py 
Log Message:
getting Parent and Parents depends on them being wrapped, so we should 
insist on having a context wrapped object here.


=== Zope3/lib/python/Zope/App/Traversing/__init__.py 1.11 => 1.12 ===
--- Zope3/lib/python/Zope/App/Traversing/__init__.py:1.11	Thu Dec  5 08:45:59 2002
+++ Zope3/lib/python/Zope/App/Traversing/__init__.py	Thu Dec  5 09:29:22 2002
@@ -43,9 +43,6 @@
           code unexpectedly.
           Consider using traverseName instead.
     """
-    # XXX This made no sense. It would mean you couldn't traverse from root
-    #if not _isWrapper(place):
-    #    raise TypeError, "Not enough context information to traverse"
     traverser = _Traverser(place)
     if default is _marker:
         return traverser.traverse(path, request=request)
@@ -88,6 +85,8 @@
     
     Raises TypeError if the given object is not context wrapped
     """
+    if not _isWrapper(obj):
+        raise TypeError, "Not enough context information to traverse"
     iterator = _WrapperChain(obj)
     iterator.next()  # send head of chain (current object) to /dev/null
     return [p for p in iterator]
@@ -123,7 +122,7 @@
     Raises a ValueError if a poorly formed location is given.
     """
     if not location:
-        raise ValueError, "location must be non-empty."
+        raise ValueError, "location must be non-empty: %s" % repr(location)
     if isinstance(location, tuple):
         t = tuple(map(unicode, location))
     elif isinstance(location, StringTypes):