Re: Solr Highlighting Question

Jed Glazner Fri, 24 Sep 2010 16:08:06 -0700

Hi Koji,

I'm trying to get the FVH to work per your suggestion, but I think I must have something misconfigured...

Here is the field def in my schema.xml:

<fieldType name="nGram" class="solr.TextField">
        <analyzer>
                <tokenizer class="solr.LowerCaseTokenizerFactory"/>
                <filter class="solr.EdgeNGramFilterFactory" minGramSize="2" maxGramSize="15" side="front"/>
                </analyzer>
    </fieldType>
<field name="grams" type="nGram" indexed="true" stored="false" multiValued="false" termVectors="true" termPositions="true" termOffsets="true"/>

Then here is my request handler in solrconfig.xml:

<requestHandler name="beyond" class="solr.SearchHandler" default="true">
        <lst name="defaults">
                <str name="defType">edismax</str>
                <str name="qf">name_title^3 plain^6 grams^1 soundsLike^1</str>
                
                
                
                <str name="tie">0.1</str>
        </lst>
</requestHandler>

But when I try the following query:

http://192.168.1.75:8983/solr/music/select?q=beyo&qt=beyond&hl=true&fl.hl=grams&f.grams.hl.useFastVectorHighlighter=true

There are hits, and results, but the highligher section is empty:
<lst name="highlighting">
<lst name="artist.artist.241"/>
<lst name="artist.artist.1616"/>
<lst name="track.track.7022"/>
<lst name="album.album.1775"/>
<lst name="album.album.3128"/>
<lst name="album.album.4590"/>
<lst name="album.album.6951"/>
<lst name="album.album.9626"/>
<lst name="artist.artist.10498"/>
<lst name="artist.artist.29631"/>
</lst>

Any Ideas?
On 09/08/2010 07:54 PM, Koji Sekiguchi wrote:

  (10/09/09 2:26), Jed Glazner wrote:

Thanks for taking time to read through this.  I'm using a checkout from


the solr 3.x branch

My problem is with the highlighter and wildcards

I can get the highlighter to work with wild cards just fine, the problem
is that  solr is returning the term matched, when what I want it to do
is highlight the chars in the term that were matched.


Example:

http://192.168.1.75:8983/solr/music/select?indent=on&q=name_title:wel*&qt=beyond&hl=true&hl.fl=name_title&f.name_title.hl.usePhraseHighlighter=true&f.name_title.hl.highlightMultiTerm=true 


The results that come back look like this:

<em>Welcome</em>   to the Jungle

What I want them to look like is this:
<em>Wel</em>come to the Jungle

  From what I gathered by searching the archives is that solr 1.1 used to
do this... Is there a way to get that functionality?

Thanks!

Try to use FastVectorHighlighter on n-gram field for highlighting problem...
But FVH cannot process wildcard query. So you should query wel instead of
wel*. Then this makes you got unwanted hit like vo<em>wel</em>.
I don't think there is a solution for both of them with OOTB today.

There is a JIRA issue, but no patches there:

https://issues.apache.org/jira/browse/SOLR-1926

Koji

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