Data starting with same words in sunspot rails - ruby-on-rails

Question

My controller is
#search = Sunspot.search(User) do
fulltext params[:search]
end
#search_products = #search.results
I want it also match those name which start with search params

Answer 1

create a new type in your solr schema file (solr/conf/schame.xml). Add this to your schema.xml under types tag :
<fieldType class="solr.TextField" name="text_pre" positionIncrementGap="100">
<analyzer type="index">
<tokenizer class="solr.StandardTokenizerFactory"/>
<filter class="solr.LowerCaseFilterFactory"/>
<filter class="solr.EdgeNGramFilterFactory" minGramSize="1" maxGramSize="10" />
</analyzer>
<analyzer type="query">
<tokenizer class="solr.StandardTokenizerFactory"/>
<filter class="solr.LowerCaseFilterFactory"/>
</analyzer>
</fieldType>
Here minGramSize is the minimum number of characters and maxGramSize is the maximum number of characters to start with that can be searched.
For example, minGramSize=8 would mean that a word like Kapil Kumar Yadav can be searched with all these substring => "K", "Ka", "Kap", "Kapi", "Kapil", "Kapil ", "Kapil K", "Kapil Ku", but will not be searched with search params having length geater then 8 characters, so its suggested to keep a value for maxGramSize that fits all your fields that have been indexed.
Now create a new dynamic field definition in same solr schama file, Add this to your schema.xml under fields tag:
<dynamicField name="*_textp" stored="false" type="text_pre" multiValued="true" indexed="true"/>
Finally onfigure all text fields in User class to index into your newly created dynamic field using as option like:
class User < ActiveRecord::Base
searchable do
text :name, as: :name_textp
text :address, as: :address_textp
# etc.
end
end
I found this here Matching substrings in fulltext search