[Zope] Finding unique objects in a ZCatalog returned list

[Mike Groves]

Hello,

I'm doing quick search using several indexes in a ZCatalog as below

<dtml-in expr="Catalog(title=query) + 
               Catalog(category=query) + 
               Catalog(description=query) + 
               Catalog(product=query) + 
               Catalog(keywords=query)">

This works really well. However, if my query string is found in more than
one index I get the same object returned more than once. 

How do I sort the list of objects returned and more importantly remove
duplicate objects?

Thanks for any help.

Mike

Dr Mike Groves
Software Strategist
Polymer Laboratories Ltd, Unit 8, The Mynd Industrial Estate 
Church Stretton, Shropshire, SY6 6EA, U.K.
Tel:		+44 1694 724420
Fax:	+44 1694 724434
Website:http://www.polymerlabs.com



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