My advanced search option allows users to search for three different fields
same time.
The fields are - first name, last name and org name. Now I have to add spell
checking feature for the fields.
When wrong spelling is entered for each of these words like first name: jahn,
last name: smath, org and org name: bpple
the search result should return a suggestion like (collation) firstname:john
AND lastname:smith AND orgname: apple
What is the best approach to implement spell checking for these three different
fields:
1. Build a single directory for all fields by copying them into a 'spell' field
as:
schema.xml configuration
<!--Setup simple analysis for spell checking-->
<fieldType name="textSpell" class="solr.TextField"
positionIncrementGap="100" >
<analyzer>
<tokenizer class="solr.StandardTokenizerFactory"/>
<filter class="solr.LowerCaseFilterFactory"/>
<filter class="solr.RemoveDuplicatesTokenFilterFactory"/>
</analyzer>
</fieldType>
<field name="FIRST_NAME" type="text" indexed="true" stored="true"/>
<field name="LAST_NAME" type="text" indexed="true" stored="true"/>
<field name="ORG_NAME" type="text" indexed="true" stored="true"
required="true"/>
<field name="spell" type="textSpell" indexed="true" stored="true"
multiValued="true"/>
<copyField source="FIRST_NAME" dest="spell"/>
<copyField source="LAST_NAME" dest="spell"/>
<copyField source="ORG_NAME" dest="spell"/>
solrconfig.xml configuration
<searchComponent name="spellcheck" class="solr.SpellCheckComponent">
<str name="queryAnalyzerFieldType">textSpell</str>
<lst name="spellchecker">
<str name="name">default</str>
<str name="field">spell</str>
<str name="spellcheckIndexDir">./spellchecker</str>
</lst>
</searchComponent>
Now the queries:
1a.
<URL>/select?q=FIRST_NAME:jahn&LAST_NAME:smath&ORG_NAME:bpple&spellcheck=true
The spell check searches against the dictionary './spllechecker' returns the
suggestions as
FIRST_NAME:john, LAST_NAME:smath and ORG_NAME:apple. Works as expected.
1b. <URL>/select?q=LAST_NAME:jahn&spellcheck=true
The spell check searches against the dictionary './spllechecker' returns the
suggestions for LAST_NAME as 'john'
But there is no last name 'john' for the field LAST_NAME. So the sub sequent
search returns NO results, which is not accepted.
So, this approach seems to be wrong for me......
2. Build a separate directory for each field.
schema.xml configuration
<!--Setup simple analysis for spell checking-->
<fieldType name="textSpell" class="solr.TextField"
positionIncrementGap="100" >
<analyzer>
<tokenizer class="solr.StandardTokenizerFactory"/>
<filter class="solr.LowerCaseFilterFactory"/>
<filter class="solr.RemoveDuplicatesTokenFilterFactory"/>
</analyzer>
</fieldType>
<field name="FIRST_NAME" type="text" indexed="true" stored="true"/>
<field name="LAST_NAME" type="text" indexed="true" stored="true"/>
<field name="ORG_NAME" type="text" indexed="true" stored="true"
required="true"/>
<field name="spell_fname" type="textSpell" indexed="true" stored="true"
multiValued="true"/>
<field name="spell_lname" type="textSpell" indexed="true" stored="true"
multiValued="true"/>
<field name="spell_org_name" type="textSpell" indexed="true" stored="true"
multiValued="true"/>
<copyField source="FIRST_NAME" dest="spell_fname"/>
<copyField source="LAST_NAME" dest="spell_lname"/>
<copyField source="ORG_NAME" dest="spell_org_name"/>
solrconfig.xml configuration
<searchComponent name="spellcheck" class="solr.SpellCheckComponent">
<str name="queryAnalyzerFieldType">textSpell</str>
<lst name="spellchecker">
<str name="name">firstname</str>
<str name="field">spell_fname</str>
<str name="spellcheckIndexDir">./fname_spellchecker</str>
</lst>
<lst name="spellchecker">
<str name="name">lastname</str>
<str name="field">spell_lname</str>
<str name="spellcheckIndexDir">./lname_spellchecker</str>
</lst>
<lst name="spellchecker">
<str name="name">oname</str>
<str name="field">spell_org_name</str>
<str name="spellcheckIndexDir">./orgname_spellchecker</str>
</lst>
</searchComponent>
Now the queries:
1a.
<URL>/select?q=FIRST_NAME:jahn&LAST_NAME:smath&ORG_NAME:bpple&spellcheck=true
How can I mention in the query to search against different dictionaries for
different fields like
FIRST_NAME in fname_spellchecker, LAST_NAME in lname_spellchecker and ORG_NAME
in orgname_spellchecker?
Or can I make the spell checker to store the field names and its values.
Please discuss my approaches and suggest a solution?
