I’ve done something similar to this using the the EdgeNGram not the
spellchecker component, I don’t know if this is along with your requirements:
The relevant portion of my fieldType config:
<filter class="solr.WordDelimiterFilterFactory”
generateWordParts="1" generateNumberParts="1"
catenateWords="0" catenateNumbers="0" catenateAll="0"
splitOnCaseChange="1"/>
<filter class="solr.LowerCaseFilterFactory"/>
<filter class="solr.EdgeNGramFilterFactory" maxGramSize="20"
minGramSize="1”/>
Basically use the WorDelimiterFilterFactory to divide the ABCD1234 into two
tokens (or don’t depending on your requirement) and then use the
EdgeNGramFilterFactory to provide partial matching on the field.
On Sep 24, 2014, at 10:05 AM, Lochschmied, Alexander
<alexander.lochschm...@vishay.com> wrote:
> Hello Solr Users,
>
> we are trying to get suggestions for part numbers using the spellchecker.
>
> Problem scenario:
>
> ABCD1234 // This is the search term
> ABCE1234 // This is what we get from spellchecker
> ABCD1244 // This is what we would like to get from spellchecker
>
> Characters towards the left of our part numbers are more relevant.
>
>
> The setup is:
>
> <searchComponent name="spellcheck_part"
> class="solr.SpellCheckComponent">
> <lst name="spellchecker">
> <str name="classname">solr.IndexBasedSpellChecker</str>
> <str name="spellcheckIndexDir">./spellchecker</str>
> <str name="field">did_you_mean_part</str>
> </lst>
> </searchComponent>
> <requestHandler name="/spell_part" class="solr.SearchHandler"
> startup="lazy">
> <lst name="defaults">
> <str name="df">did_you_mean_part</str>
> <str name="spellcheck">on</str>
> </lst>
> <arr name="last-components">
> <str>spellcheck_part</str>
> </arr>
> </requestHandler>
>
>
> <fieldType name="did_you_mean_part" class="solr.TextField"
> positionIncrementGap="100">
> <analyzer type="index">
> <charFilter
> class="solr.PatternReplaceCharFilterFactory" pattern="[\s]+" replacement=""/>
> <tokenizer class="solr.WhitespaceTokenizerFactory"/>
> <filter class="solr.LowerCaseFilterFactory"/>
> <filter class="solr.EdgeNGramFilterFactory"
> minGramSize="1" maxGramSize="20" side="front"/>
> <filter
> class="solr.RemoveDuplicatesTokenFilterFactory"/>
> </analyzer>
> <analyzer type="query">
> <charFilter
> class="solr.PatternReplaceCharFilterFactory" pattern="[\s]+" replacement=""/>
> <tokenizer class="solr.KeywordTokenizerFactory"/>
> <filter class="solr.LowerCaseFilterFactory"/>
> <filter class="solr.EdgeNGramFilterFactory"
> minGramSize="1" maxGramSize="20" side="front"/>
> </analyzer>
> </fieldType>
>
> Can we tweak the setup such that we should get more relevant part numbers?
>
> Thanks,
> Alexander
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