How do you enable partial matching with "sunspot for rails"? - ruby-on-rails

Question

I just have done setting up sunspot_rails and it seems working well except one thing.
After I made 3 records like below
name=John
name=John2
name=John3
when I search with the keyword "John", only 1st record shows up. it looks like complete matching.
I'd like to have all of them to be appeared as search result.
Is this supposed to be happened as default?
or did I setup something wrong??

Answer 1

If you want return substrings in fulltext search, you can take a look in
https://github.com/sunspot/sunspot/wiki/Matching-substrings-in-fulltext-search
Also you can add a file sunspot_solr.rb for pagination of results in myapp/config/initializers/ with:
Sunspot.config.pagination.default_per_page = 100
return 100 results for this case.
Added:
Your schema.xml file is founded in yourappfolder/solr/conf
Also you can add <filter class="solr.NGramFilterFactory"/> to match arbitrary substrings.
This is my particular config for schema.xml:
<fieldType name="text" class="solr.TextField" omitNorms="false">
<analyzer>
<tokenizer class="solr.StandardTokenizerFactory"/>
<filter class="solr.StandardFilterFactory"/>
<filter class="solr.LowerCaseFilterFactory"/>
</analyzer>
</fieldType>
<fieldtype class="solr.TextField" name="text_pre" positionIncrementGap="100">
<analyzer type="index">
<tokenizer class="solr.WhitespaceTokenizerFactory"/>
<filter class="solr.LowerCaseFilterFactory"/>
<filter class="solr.NGramFilterFactory" minGramSize="2" maxGramSize="10"/>
<filter class="solr.ISOLatin1AccentFilterFactory"/>
<filter class="solr.TrimFilterFactory" />
<filter class="solr.EdgeNGramFilterFactory" minGramSize="2" maxGramSize="10"/>
</analyzer>
<analyzer type="query">
<tokenizer class="solr.WhitespaceTokenizerFactory"/>
<filter class="solr.LowerCaseFilterFactory"/>
<filter class="solr.ISOLatin1AccentFilterFactory"/>
<filter class="solr.TrimFilterFactory" />
</analyzer>
</fieldtype>
For me it does works fine with full strings and substrings for all keywords. Please do not forget to restart the server and reindex your models for the changes to take effect.
Regards!

Answer 2

Thanks!!!
block from girls controller(girls_controller.rb)
def index
#search = Girl.search do
fulltext params[:search]
end
#girls = #search.results
# #girls = Girl.all
#
# respond_to do |format|
# format.html # index.html.erb
# format.json { render json: #girls }
# end
end
block from Girl model(girl.rb)
searchable do
text :name_en, :name_es, name_ja
end