CODEWITHSUNDEEP
javasolrspell-checking
Randik Manule
Randik Manule

Reputation: 3

Why collations results are empty in Solr spell checking

I have configured a Solr spellchecking comoponent using IndexBasedSpellChecker with a core containing country names: 

<searchComponent name="indexBasedSpellCheck" class="solr.SpellCheckComponent">
    <lst name="spellchecker"> 
      <str name="name">indexBasedSpellCheck</str>
      <str name="classname">solr.IndexBasedSpellChecker</str> 
      <str name="spellcheckIndexDir">./indexspellchecker</str> 
      <str name="field">name</str> 
      <str name="buildOnCommit">true</str> 
      <str name="distanceMeasure">org.apache.lucene.search.spell.LevensteinDistance</str> 
      <str name="accuracy">0.5</str>
    </lst>
  </searchComponent>

And a request handler for spellchecking:

<requestHandler name="/index-spell" class="solr.SearchHandler" startup="lazy">
    <lst name="defaults">
      <str name="spellcheck.dictionary">idxBasedSpellCheck</str>
      <str name="spellcheck">on</str>
      <str name="spellcheck.extendedResults">true</str>
      <str name="spellcheck.count">10</str>
      <str name="spellcheck.alternativeTermCount">5</str>
      <str name="spellcheck.maxResultsForSuggest">5</str>
      <str name="spellcheck.collate">true</str>
      <str name="spellcheck.collateExtendedResults">true</str>
      <str name="spellcheck.maxCollationTries">10</str>
      <str name="spellcheck.maxCollations">5</str>
    </lst>
    <arr name="last-components"> 
      <str>indexBasedSpellCheck</str>
    </arr>
  </requestHandler>

When I request :

curl 'http://localhost:8983/solr/mycore/index-spell?indent=on&spellcheck.q=tanaz&wt=json&spellcheck.collate=true'

I get results in the suggestions like :

 "spellcheck":{
    "suggestions":[
      "tanaz",{
        "numFound":3,
        "startOffset":0,
        "endOffset":5,
        "origFreq":0,
        "suggestion":[{
            "word":"canada",
            "freq":1},
          {
            "word":"panama",
            "freq":1},
          {
            "word":"tanzania",
            "freq":1}]}],
    "correctlySpelled":false,
    "collations":[]}

Why are my collations empty? I have spellcheck.collate=true in my request.

Upvotes: 0

Views: 788

Answers (1)

mjlowky
mjlowky

Reputation: 1223

I think you are missing the df (default field) parameter in your request. Add df=name in you request:

http://localhost:8983/solr/mycore/index-spell?indent=on&spellcheck.q=tanaz&wt=json&spellcheck.collate=true&df=name

You also can configure this in your request handler defaults, so you don't need to send this in request.

<requestHandler name="/index-spell" class="solr.SearchHandler" startup="lazy">
    <lst name="defaults">
       ...
      <str name="df">name</str>
       ...
    </lst>
    <arr name="last-components"> 
      <str>idxBasedSpellCheck</str>
    </arr>
  </requestHandler>

Upvotes: 3

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