sorting over creation date or some getObjProperty('xyz',REQUEST)

Dear all,


may be something has an idea here for my new "News-Box" automatic object (will 
go GPL when 1.0 too). From my view it usually should not difficult to sort a 
list of (special-)objects by date or other fields.

How i can sort a list of ZMS objects (PAGES or PAGEEMELENTS) - i.e. from 
"filteredTreeNodes()" against a (special) object property field like "creation 
date" (not "bobobase_modification_time") or other fields / properties?

It seems until today Zopes dtml-in sort= is not able to work with a expression 
- i.e.
   <dtml-in objects sort="getObjProperty('creation_date',REQUEST)">

or even i.e.:
   <dtml-in objects 
sort="int(getLangFmtDate(getObjProperty('change_dt',REQUEST),lang,'%Y%m%d'))">

as Zopes sort seems not able to handle expressions here (even if there are 
some patches / ideas from Zope users).

I've checked ZMS byself as i've found a "sort()" and "sort_list()" function, 
but both didn't solve this (may be did not found the way to get them running 
as described). "sort()" just seems to sort against the "position" on the page.

Is there any direct way to solve this or do i have to write a additional 
sorting method for this? 

You can see the object here in one simple configuration:
http://www.stadtradio-goettingen.de
(box ->"Aktuelle Nachrichten")

(just sorting by position on the page / in folder)

many thanks and
best regards,


Niels.
-- 

---

  Niels Dettenbach
  ---
  Syndicat IT&Internet
  http://www.syndicat.com
  T.-Muentzer.-Str. 2, 37308 Heilbad Heiligenstadt - DE
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  PGP public key ID 651CA20D
  Fingerprint: 55E0 4DCD B04C 4A49 1586  88AE 54DC 4465 651C A20D
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