[pylucene-dev] Prohibited field query

[Peter Fein]

On Monday 11 December 2006 07:20, Georges Racinet wrote:
> First post to the list, I'd like to congratulate first PyLucene devs

-1 Karma.  Go back to Slashdot. ;)

> I'm trying to fire a prohibited request on a field
> I've tried many things, including going through QueryParser, nothing
> worked so far (I always get 0 matches, which is wrong).
> This is on PyLucene 1.9.1 (upgrading isn't a option, sadly).

If I'm reading correctly, you're trying to retrieve all docs where 
status!=hidden.  In lucene, a search consisting only of negative terms always 
returns no results.  If you AND some positive terms into your query, things 
will work as you want.

If you do really want only those docs with -status:hidden, you may be able to 
AND it with 
http://lucene.apache.org/java/docs/api/org/apache/lucene/search/MatchAllDocsQuery.html, 
though I've never tried it & I don't know if it's even available under 1.9.

If you're still stuck, the LIA book describes other approaches for solving 
this problem (ANDing w/ a term you know to be in all for your docs, IIRC). 
You could also enumerate all of the other values of the status field w/ OR 
(assuming you know all of them ahead of time).

-- 
Peter Fein                                                     pfein at pobox.com
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