[Zope] Lost with navigation using objectValues

[Stephane Bortzmeyer]

I just try to automatically get a list of subfolders, following the
example in the ZopeBook
<http://www.zope.org/Members/michel/ZB/SimpleExamples.html>. Here is
my code, in a DTML method in the root folder:

<ul>
      <dtml-in expr="objectValues('Folder')">
        <li><a href="<dtml-var absolute_url>">
        <dtml-var title_or_id></a></li>
      </dtml-in>
</ul>

If I call it from /index_html, it works fine. If I call it from any
other document anywhere, I just get <ul></ul> (so I'm sure the method
has been called) but nothing else as if objectValues sent nothing (no
need to say that I *have* subfolders an I also tried without the
'Folder' restriction, with the same result).

Any advice? Zope RPM 2.2.2 on RedHat 6.2.

     Zope version: Zope 2.2.2 (source release, python 1.5.2, linux2) 
     Python version: 1.5.2 (#1, Feb 1 2000, 16:32:16) [GCC
     egcs-2.91.66 19990314/Linux (egcs- 
     System Platform: linux-i386 
     Process ID: 17906 (4101) 
     Running for: 2 hours 55 min 45 sec