On Dec 11, 2006, at 4:15 PM, Peter Fein wrote:
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. ;)
How the hell did you guess I can't pretend to be nice ?
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.
Gasp, I saw this mentionned in the QueryParser syntax doc. Got
confused because
it's inside the "NOT" operator section, so I thought '-' was the way
to go. How stupid.
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.
It is, it's exposed in PyLucene, and it works. Thanks !
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).
Actually, I started with a simple case to see how it works...
I'm going to add this missing feature to NXLucene
(http://www.cps-project.org/sections/projects/nxlucene/readme).
Most of our queries have lots of clauses, so that won't be an issue.
I'll probably throw a MatchAllDocs in (if useful only of course)
You could also enumerate all of the other values of the status
field w/ OR
(assuming you know all of them ahead of time).
FTR, that's precisely what I couldn't do. The first concrete use-case
will be to hide documents
from a few users among a lot...
Thanks again,
---------
Georges Racinet, Nuxeo SAS
Open Source Enterprise Content Management (ECM)
Web: http://www.nuxeo.com/ and http://www.nuxeo.org/ - Tel: +33 1 40
33 79 87
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