在Solr中搜索

Question

I am building an ecommerce project where I am using solr search engine.I want to search based on specific keyword. If I enter "c1234" , it should display all the documents having keyword "c1234". Its working fine. But, if I enter "c12#34" then also it should consider "c1234" only. So the problem is I want to ignore the hash tag here. Solr should not consider my hash tag and it should display the same result for both the cases.

The other problem is I want to trim whitespaces. If I search "HP 940", it should trim the whitespace and should display the similar result as "HP940". So I want to have similar reults to be displayed with or without the whitespace. For example, if I enter "Hp 940", solr should consider it as "HP940". So the problem is triming the white spaces

Thanks in Advance

Answer 1

Try to use olr.WordDelimiterFilterFactory

Test case:

 <fieldType name="text_general" class="solr.TextField" positionIncrementGap="100" multiValued="true">
    <analyzer type="index">
      <tokenizer class="solr.WhitespaceTokenizerFactory" />
      <filter class="solr.WordDelimiterFilterFactory"
            generateWordParts="1" catenateWords="1"
            generateNumberParts="1" catenateNumbers="0" splitOnNumerics="1"
            catenateAll="0" splitOnCaseChange="1"
            stemEnglishPossessive="1" preserveOriginal="1" />
       <filter class="solr.LowerCaseFilterFactory"/>
    </analyzer>
    <analyzer type="query">
    <tokenizer class="solr.StandardTokenizerFactory"/>
      <filter class="solr.StopFilterFactory" words="stopwords.txt" ignoreCase="true"/>
      <filter class="solr.LowerCaseFilterFactory"/>
    </analyzer>
  </fieldType>

To replace # you should use https://cwiki.apache.org/confluence/display/solr/CharFilterFactories

Answer 2

For the hashtag and other characters you should take a look at the solr.WordDelimiterFilterFactory for this with the catenateWords parameter or alternatively the solr.PatternReplaceCharFilterFactory.

For words like HP 940 also consider something like phrase fields on the dismax handler with no slop.