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Bhuvan
Bhuvan

Reputation: 104

partial search using Solr EdgeNgramFileterFactory

I am using EdgeNgramFilterFactory for partial search 

<filter class="solr.EdgeNGramFilterFactory" minGramSize="4" maxGramSize="15" side="front"/>

so if the word is "sfx" this will not be stored in index as its length is < 4 and i cannot search it , is there any way to store the words with lenghth < minGramSize in index and make it searchable ???

Using Solr 4.3 Thanks ...

Upvotes: 0

Views: 48

Answers (1)

Abhijit Bashetti
Abhijit Bashetti

Reputation: 8668

you have to change the minGramSize to lower length like to 3 your case. Or may be you can keep it as 2.

In earlier version (I used 3.3) had the side front and back so I Used it like this.

<fieldType name="text_reference" class="solr.TextField" sortMissingLast="true" omitNorms="true" positionIncrementGap="100">
    <analyzer type="index">
      <tokenizer class="solr.KeywordTokenizerFactory"/>
      <filter class="solr.LowerCaseFilterFactory"/>
      <filter class="solr.EdgeNGramFilterFactory" minGramSize="2" maxGramSize="50" side="front"/>
      <filter class="solr.EdgeNGramFilterFactory" minGramSize="2" maxGramSize="50" side="back"/>
    </analyzer>
    <analyzer type="query">
       <tokenizer class="solr.KeywordTokenizerFactory"/>
       <filter class="solr.LowerCaseFilterFactory"/>
    </analyzer>
  </fieldType>

or you can index the text using another field type where you will keep the text as it without ngraming and search in that field as well. Where their wont be any n-gram filter so it the text with length 3 will get indexed.

<fieldType name="text_delimeter" class="solr.TextField" positionIncrementGap="100">
   <analyzer type="index">
      <tokenizer class="solr.WhitespaceTokenizerFactory"/>
      <filter class="solr.WordDelimiterFilterFactory" generateWordParts="1" generateNumberParts="1" catenateWords="1" catenateNumbers="1" preserveOriginal="1" catenateAll="1" splitOnCaseChange="0"/>
     <filter class="solr.LowerCaseFilterFactory"/>
  </analyzer>
  <analyzer type="query">
    <tokenizer class="solr.KeywordTokenizerFactory"/>
    <filter class="solr.LowerCaseFilterFactory"/>
  </analyzer>
</fieldType>

Upvotes: 1

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