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From Chris Hostetter <hossman_luc...@fucit.org>
Subject Re: Document Boost not evaluated when using standard Query Type?
Date Wed, 14 Sep 2011 02:56:17 GMT

: I want to show all documents with of a certain type. The documents 
: should be ordered by the index time document boost.

	...

: But in fact every document gets the same score:
: 
: 0.99997306 = (MATCH) fieldWeight(doctype:music in 1), product of:
:   1.0 = tf(termFreq(doctype:music)=1)
:   0.99997306 = idf(docFreq=37138, maxDocs=37138)
:   1.0 = fieldNorm(field=doctype, doc=1)

Index boosts are folded into the fieldNorm.  by the looks of it, you are 
using omitNorms="true" on the field "doctype"

: Is there a better way to get a list of all documents (matching a simple 
: "where clause) sorted by documents boost?

fieldNorms are very corse.  In my opinion, if you have a 
"weighting" you want to use to affect score sort, it's better to index 
that weight as a numeric field, and explicitly factor it into the score 
using a function query...

	q={!boost b=yourWeightField v=$qq}&qq=doctype:music

More info...

https://lucene.apache.org/solr/api/org/apache/solr/search/BoostQParserPlugin.html
http://www.lucidimagination.com/blog/2011/06/20/solr-powered-isfdb-part-10/
https://github.com/lucidimagination/isfdb-solr/commit/75f830caa1a11fd97ab48d6428096cf63f53cb3b

-Hoss

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