You are creating grams only while indexing and not querying hence 'ludlwo'
would not match. Your analyzer will create the following grams while
indexing for 'ludlow': lu lud ludl ludlo ludlow and hence would not match
to 'ludlwo'.

Either you need to create gram while querying also or use Edit Distance.

On Wed, Jul 18, 2012 at 7:43 PM, Husain, Yavar <yhus...@firstam.com> wrote:

>
>
>
> I have configured NGram Indexing for some fields.
>
> Say I search for the city Ludlow, I get the results (normal search)
>
> If I search for Ludlo (with w ommitted) I get the results
>
> If I search for Ludl (with ow ommitted) I still get the results
>
> I know that they are all partial strings of the main string hence NGram
> works perfect.
>
> But when I type in Ludlwo (misspelt, characters o and w interchanged) I
> dont get any results, It should ideally match "Ludl" and provide the
> results.
>
> I am not looking for Edit distance based Spell Correctors. How can I make
> above NGram based search work?
>
> Here is my schema.xml (NGramFieldType):
>
> <fieldType name="nGram" class="solr.TextField" positionIncrementGap="100"
> stored="false" multiValued="true">
>
> <analyzer type="index">
>
> <tokenizer class="solr.StandardTokenizerFactory"/>
>
> <!-- potentially word delimiter, synonym filter, stop words, NOT stemming
> -->
>
> <filter class="solr.LowerCaseFilterFactory"/>
>
> <filter class="solr.EdgeNGramFilterFactory" minGramSize="2"
> maxGramSize="15" side="front" />
>
>
>
> </analyzer>
>
> <analyzer type="query">
>
> <tokenizer class="solr.StandardTokenizerFactory"/>
>
> <!-- potentially word delimiter, synonym filter, stop words, NOT stemming
> -->
>
> <filter class="solr.LowerCaseFilterFactory"/>
>
> </analyzer>
>
> </fieldType>
>
>
> </PRE>
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