[Zope-CMF] Topic ANDing

[Tres Seaver]

On Mon, 10 Sep 2001, Meilicke, Scott wrote:

> I'd like my topics to be able to AND instead of OR.  Per this message:
> 
> http://zope.nipltd.com/public/lists/ptk-archive.nsf/2f80d8dcfde6f195802568c1
> 00635ff4/2d170476f956835e80256a4f0051f9e3?OpenDocument&Highlight=2,criteria
> 
> zope 2.4.0 should have the ability to do so via a 'drop in index'.  Does
> anyone know how I can use this feature?  I'm using zope 2.4.0 and CMF 1.1. 
> 
> More detail:
> 
> doc1: subject="market", "competition"
> doc2: subject="market", "industry"
> 
> topic1 criteria:"market", "competition"
> topic2 criteria:"market", "industry"
> 
> I would like doc1 to show up in only topic1, and doc2 to show up only in
> topic2.  I'd rather not use subtopics for this.

What you require is not a "drop-in index";  standard keyword indexes
(of which the Subject index is one) have this feature, but the
CMFTopic.ListCriterion does not expose it.  We would need to add
a property to ListCriterion to track the "operator" desired, and
then modify its 'getCriteriaItems' method to add that value, using
field + "_operator" as its key.

Tres.
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Tres Seaver                                tseaver@zope.com
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