[Zope] Dymanic sort="&dtml-a_dtml_var;" in DTML?

[Joel Burton]

I'd like to create a DTML method that lists objects, sorting either by 
name or modified-date. I know I can do this by:

<dtml-if ..byname...>
   <dtml-in blah sort="title_or_id">
   ...
</dtml-else>
   <dtml-in balh sort="bobobase_modification_time">
   ...
</dtml-if>


However, this requires lots of code. I'm trying to do it like this:


Sorted by &dtml-sortby;  <!-- for debugging -->

<dtml-in objectValues sort="&dtml-sortby;">
  <dtml-var title_or_id> (<dtml-var bobobase_modification_time>)
</dtml-in>


I have a property, sortby, of the enclosing folder set to 
"bobobase_modification_time"; when this method is called, it 
dutifully reports that sortby=b_m_t; however, it doesn't sort things 
this way (I can't tell exactly how it is sorting them, and when I 
refresh, the order occasionally changes.)

Any ideas?

--
Joel Burton, Director of Information Systems -*- jburton@scw.org
Support Center of Washington (www.scw.org)