CODEWITHSUNDEEP
ruby-on-railsfiltersolr
Mark Redding
Mark Redding

Reputation: 209

Solr query vs. filter query not working the same

I have been using solr for a while now (acts_as_solr) , but just came across a very strange one I can't seem to get working.

I have a 'text' field lets call it

audience = [students, teachers, students_teachers, none]

when I send the query

q= audience:students

it returns only those with it set to students.

yet if I do 

fq= audience:students

I get back results with both [students, students_teachers]

I have tried putting quotes, parens and all sorts around the filter query, but it seems like it is not honoring them as I would expect. I am actually using a negation side of fq here, to hide from the user some results.

I am using solr 1.4.1

Any thoughts? I am about to change the options to unique words with no reuse. Might be an issue with the _ 's in the names.

<fieldType name="text" class="solr.TextField" positionIncrementGap="100">
  <analyzer type="index">
    <tokenizer class="solr.WhitespaceTokenizerFactory"/>
    <filter class="solr.StopFilterFactory" ignoreCase="true" words="stopwords.txt"/>
    <filter class="solr.WordDelimiterFilterFactory" generateWordParts="1" generateNumberParts="1" catenateWords="1" catenateNumbers="1" catenateAll="0"/>
    <filter class="solr.LowerCaseFilterFactory"/>
    <filter class="solr.EnglishPorterFilterFactory" protected="protwords.txt"/>
    <filter class="solr.RemoveDuplicatesTokenFilterFactory"/>
  </analyzer>
  <analyzer type="query">
    <tokenizer class="solr.WhitespaceTokenizerFactory"/>
    <filter class="solr.SynonymFilterFactory" synonyms="synonyms.txt" ignoreCase="true" expand="true"/>
    <filter class="solr.StopFilterFactory" ignoreCase="true" words="stopwords.txt"/>
    <filter class="solr.WordDelimiterFilterFactory" generateWordParts="1" generateNumberParts="1" catenateWords="0" catenateNumbers="0" catenateAll="0"/>
    <filter class="solr.LowerCaseFilterFactory"/>
    <filter class="solr.EnglishPorterFilterFactory" protected="protwords.txt"/>
    <filter class="solr.RemoveDuplicatesTokenFilterFactory"/>
  </analyzer>
</fieldType>

Upvotes: 1

Views: 789

Answers (1)

Mauricio Scheffer
Mauricio Scheffer

Reputation: 99730

WordDelimiterFilterFactory in your field type is probably generating the terms "students" and "teachers" from the string "students_teachers".

So when you search for "students", it also matches the string that originally was "students_teachers".

As an aside: Solr is a very configurable tool and can be quite complex, I recommend not treating it as a black box or you'll very probably have more and more of these "WTF moments".

Upvotes: 2

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