Solr search with/without hyphen
solr
Solution
You need to adjust the analysis side of your schema. debugQuery=true and the Solr Analysis tools are your friends for finding these kind of errors.
Taking your configuration the search for wifi produces the following query:
wifi
"parsedquery_toString": "text:wifi",
and for wi-fi
wi-fi
"parsedquery_toString": "text:\"(wi-fi wi) (fi wifi)\"",
The analysis side of our configuration generating none matching terms for wi-fi.
If we change the filter in the analysis side not to produce word parts:
<filter class="solr.WordDelimiterFilterFactory" generateWordParts="0" generateNumberParts="1" catenateWords="1" catenateNumbers="1" catenateAll="0" splitOnCaseChange="1" preserveOriginal="1" />
We get the following search phrases generated for wifi
parsedquery_toString": "text:wifi",
and for wi-fi:
"parsedquery_toString": "text:wi-fi text:wifi"
Which match out indexed terms for wi-fi and wifi from the Analysis tool
wi-fi, wi, fi, wifi
wifi
Note: text is our default field in this example
Problem
I got an issue trying to get relevant search results working with words with and without hyphen. I created two documents, one with "wifi" and one with "wi-fi" in the "text" field. When searching "wifi", both document appears in the search result, which is fine. When searching "wi-fi", only the document with "wi-fi" appears in the search result. Here is my configuration : ``` <field name="text" type="text" indexed="true" stored="true" omitNorms="true" /> <fieldType name="text" class="solr.TextField" positionIncrementGap="100" autoGeneratePhraseQueries="true"> <analyzer type="index"> <tokenizer class="solr.WhitespaceTokenizerFactory"/> <charFilter class="solr.HTMLStripCharFilterFactory"/> <filter class="solr.ASCIIFoldingFilterFactory" /> <filter class="solr.StopFilterFactory" ignoreCase="true" words="stopwords.txt"/> <filter class="solr.WordDelimiterFilterFactory" generateWordParts="1" generateNumberParts="1" catenateWords="1" catenateNumbers="1" catenateAll="0" splitOnCaseChange="1" preserveOriginal="1" /> <filter class="solr.LowerCaseFilterFactory"/> <filter class="solr.PorterStemFilterFactory"/> <filter class="solr.RemoveDuplicatesTokenFilterFactory"/> </analyzer> <analyzer type="query"> <tokenizer class="solr.WhitespaceTokenizerFactory"/> <charFilter class="solr.HTMLStripCharFilterFactory"/> <filter class="solr.ASCIIFoldingFilterFactory" /> <filter class="solr.StopFilterFactory" ignoreCase="true" words="stopwords.txt"/> <filter class="solr.WordDelimiterFilterFactory" generateWordParts="1" generateNumberParts="1" catenateWords="1" catenateNumbers="1" catenateAll="0" splitOnCaseChange="1" preserveOriginal="1" /> <filter class="solr.LowerCaseFilterFactory"/> <filter class="solr.PorterStemFilterFactory"/> <filter class="solr.RemoveDuplicatesTokenFilterFactory"/> </analyzer> </fieldType> ``` Here is the result of the analyzis : https://www.evernote.com/shard/s7/sh/f1bab83a-7fd5-4bf3-9e67-239ea0c71441/98b1103577638734fb9335f755591b82/deep/0/Solr-Admin-(jeanfrancoiscote.egzakt.com).png Debug of the query when searching "wi-fi". I can't find out why it doesn't find both documents : ``` <?xml version="1.0" encoding="UTF-8"?> <response> <lst name="responseHeader"> <int name="status">0</int> <int name="QTime">1</int> <lst name="params"> <str name="debugQuery">true</str> <str name="indent">true</str> <str name="q">wi-fi</str> <str name="wt">xml</str> </lst> </lst> <result name="response" numFound="1" start="0"> <doc> <int name="id">1869</int> <str name="route">@sujet_simple?sujet_id=1869&slug=wi-fi</str> <str name="name">Wi-fi</str> <str name="text"><p> Wi-fi</p> </str> <long name="_version_">1493472450933948416</long></doc> </result> <lst name="debug"> <str name="rawquerystring">wi-fi</str> <str name="querystring">wi-fi</str> <str name="parsedquery">MultiPhraseQuery(text:"(wi-fi wi) (fi wifi)")</str> <str name="parsedquery_toString">text:"(wi-fi wi) (fi wifi)"</str> <lst name="explain"> <str name="1869"> 30.33298 = (MATCH) weight(text:"(wi-fi wi) (fi wifi)" in 0) [DefaultSimilarity], result of: 30.33298 = score(doc=0,freq=1.0 = phraseFreq=1.0 ), product of: 0.99999994 = queryWeight, product of: 30.332981 = idf(), sum of: 7.684612 = idf(docFreq=1, maxDocs=1600) 7.684612 = idf(docFreq=1, maxDocs=1600) 7.684612 = idf(docFreq=1, maxDocs=1600) 7.2791467 = idf(docFreq=2, maxDocs=1600) 0.032967415 = queryNorm 30.332981 = fieldWeight in 0, product of: 1.0 = tf(freq=1.0), with freq of: 1.0 = phraseFreq=1.0 30.332981 = idf(), sum of: 7.684612 = idf(docFreq=1, maxDocs=1600) 7.684612 = idf(docFreq=1, maxDocs=1600) 7.684612 = idf(docFreq=1, maxDocs=1600) 7.2791467 = idf(docFreq=2, maxDocs=1600) 1.0 = fieldNorm(doc=0) </str> </lst> <str name="QParser">LuceneQParser</str> <lst name="timing"> <double name="time">1.0</double> <lst name="prepare"> <double name="time">0.0</double> <lst name="query"> <double name="time">0.0</double> </lst> <lst name="facet"> <double name="time">0.0</double> </lst> <lst name="mlt"> <double name="time">0.0</double> </lst> <lst name="highlight"> <double name="time">0.0</double> </lst> <lst name="stats"> <double name="time">0.0</double> </lst> <lst name="debug"> <double name="time">0.0</double> </lst> </lst> <lst name="process"> <double name="time">1.0</double> <lst name="query"> <double name="time">0.0</double> </lst> <lst name="facet"> <double name="time">0.0</double> </lst> <lst name="mlt"> <double name="time">0.0</double> </lst> <lst name="highlight"> <double name="time">0.0</double> </lst> <lst name="stats"> <double name="time">0.0</double> </lst> <lst name="debug"> <double name="time">1.0</double> </lst> </lst> </lst> </lst> </response> ``` Thanks for your help.