I tried editing the SweetSpotSimilarity class located at lucene/contrib/misc/src/java/org/apache/lucene/misc/SweetSpotSimilarity.java to just return 1 for each function and the score does not change at all. This has led me to believe that it does not recognize similarity at all. At this point, all I have for similarity is the line at the end of the file to apply similarity to all searches but that does not even work. So where am I going wrong?
Thanks, Brian Lamb On Thu, May 19, 2011 at 3:41 PM, Brian Lamb <brian.l...@journalexperts.com>wrote: > Also, I've tried adding: > > <similarity class="org.apache.lucene.misc.SweetSpotSimilarity"/> > > To the end of the schema file so that it is applied globally but it does > not appear to change the score either. What am I doing incorrectly? > > Thanks, > > Brian Lamb > > On Thu, May 19, 2011 at 2:45 PM, Brian Lamb <brian.l...@journalexperts.com > > wrote: > >> Hi all, >> >> Based on advice I received on a previous email thread, I applied patch >> https://issues.apache.org/jira/browse/SOLR-2338. My goal was to be able >> to apply a similarity class to certain fields but not all fields. >> >> I ran the following commands: >> >> $ cd <your Solr trunk checkout dir> >> $ svn up >> $ wget >> https://issues.apache.org/jira/secure/attachment/12475027/SOLR-2338.patch >> $ patch -p0 -i SOLR-2338.patch >> >> And I did not get any errors. I then created my own SimilarityClass listed >> below because it isn't very large: >> >> package org.apache.lucene.misc; >> import org.apache.lucene.search.DefaultSimilarity; >> >> public class SimpleSimilarity extends DefaultSimilarity { >> public SimpleSimilarity() { super(); } >> >> >> public float idf(int dont, int care) { return 1; } >> } >> >> As you can see, it isn't very complicated. I'm just trying to remove the idf >> from the scoring equation in certain cases. >> >> >> Next, I make a change to the schema.xml file: >> >> <fieldType name="string_noidf" class="solr.StrField" sortMissingLast="true" >> omitNorms="true"> >> >> >> <similarity class="org.apache.lucene.misc.SimpleSimilarity"/> >> </fieldType> >> >> And apply that to the field in question: >> >> <field name="string_noidf" multiValued="true" type="string_noidf" >> indexed="true" stored="true" required="false" omitNorms="true" /> >> >> >> But I think something did not get applied correctly to the patch. I >> restarted and did a full import but the scores are exactly the same. Also, I >> tried using the existing SweetSpotSimilarity: >> <fieldType name="string_noidf" class="solr.StrField" sortMissingLast="true" >> omitNorms="true"> >> <similarity class="org.apache.lucene.misc.SweetSpotSimilarity"/> >> >> >> </fieldType> >> >> But the scores remained unchanged even in that case. At this point, I'm not >> quite sure how to debug this to see whether the problem is with the patch or >> the similarity class but given that the SweetSpot similarity class didn't >> work either, I'm inclined to think it was a problem with the patch. >> >> >> Any thoughts on this one? >> >> Thanks, >> >> Brian Lamb >> >> >> >
