When I index a text such as "Chamäleon" and look for suggestions for "chamä"
and/or "Chamä", I'd expect to get "Chamäleon" (uppercased).
But what happens is
If lowecasefilter (see below (1)) set
"chamä" returns "chamäleon"
"Chamä" does not match
If lowecasefilter (1) not set
"Chamä" returns "Chamäleon"
"chamä" does not match
I guess lowecasefilter should not be set/active, but then how do I get matches
even if the search term is lowercased?
Context:
schema.xml
...
<fieldType class="solr.TextField" name="text_de" positionIncrementGap="100">
<analyzer type="index">
<tokenizer class="solr.StandardTokenizerFactory"/>
<filter class="solr.LowerCaseFilterFactory"/>
<filter class="solr.StopFilterFactory" ignoreCase="true"
words="lang/stopwords_de.txt"/>
<filter class="solr.GermanLightStemFilterFactory"/>
</analyzer>
<analyzer type="query">
<tokenizer class="solr.StandardTokenizerFactory"/>
<filter class="solr.SynonymFilterFactory" expand="true"
ignoreCase="true" synonyms="synonyms.txt"/>
<filter class="solr.LowerCaseFilterFactory"/>
<filter class="solr.StopFilterFactory" ignoreCase="true"
words="lang/stopwords_de.txt"/>
<filter class="solr.GermanLightStemFilterFactory"/>
</analyzer>
</fieldType>
...
<fieldType class="solr.TextField" name="text_suggest"
positionIncrementGap="100">
<analyzer>
<tokenizer class="solr.UAX29URLEmailTokenizerFactory"/>
<filter class="solr.StopFilterFactory" ignoreCase="true"
words="stopwords.txt"/>
<filter class="solr.LowerCaseFilterFactory"/> <!-- (1) -->
</analyzer>
</fieldType>
solrconfig.xml
-----------------
...
<requestHandler class="org.apache.solr.handler.component.SearchHandler"
name="/suggest">
<lst name="defaults">
<str name="echoParams">none</str>
<str name="wt">json</str>
<str name="indent">false</str>
<str name="spellcheck">true</str>
<str name="spellcheck.dictionary">suggestDictionary</str>
<str name="spellcheck.onlyMorePopular">true</str>
<str name="spellcheck.count">5</str>
<str name="spellcheck.collate">false</str>
</lst>
<arr name="components">
<str>suggest</str>
</arr>
</requestHandler>
...
<searchComponent class="solr.SpellCheckComponent" name="suggest">
<lst name="spellchecker">
<str name="name">suggestDictionary</str>
<str
name="classname">org.apache.solr.spelling.suggest.Suggester</str>
<str
name="lookupImpl">org.apache.solr.spelling.suggest.fst.FSTLookupFactory</str>
<str name="field">suggest</str>
<float name="threshold">0.</float>
<str name="buildOnCommit">true</str>
</lst>
</searchComponent>
...
