facet Prefix (or term prefix)

[Jason Brown <Ja...@sjp.co.uk>]

I am aware of the facet.prefix facility. I am using SOLR to return a facetted fields contents - I use the facet.prefix to restrict what returns from SOLR - this is very useful for predictive search functionality (autocomplete).

My only issue is that the field I facet on is a string and could have 2 or 3 words in it, thus this process will only return strings that begin with what the user is typing into my UI search box. It would be useful if I could get facets back where I could match somewhere in the facetted field (not just at the begninning), i.e. is there a fact.contains method?

If not I'll just have to code this in my service layer having received all facets from SOLR (without the prefix)

Thanks for any help.




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Re: facet Prefix (or term prefix)

[Markus Jelsma <ma...@openindex.io>]

Hi,

There is no facet.contains facility there are alternatives. Instead of using 
the faceting engine, you will need to create a field that has an 
NGramTokenizer.  Properly configured, you can use this field to query upon and 
it will return what you would expect from a facet.contains feature.

Here's a post on the subject which you may find useful:
http://www.lucidimagination.com/blog/2009/09/08/auto-suggest-from-popular-
queries-using-edgengrams/

Cheers,

On Friday 22 October 2010 13:20:56 Jason Brown wrote:
> I am aware of the facet.prefix facility. I am using SOLR to return a
> facetted fields contents - I use the facet.prefix to restrict what returns
> from SOLR - this is very useful for predictive search functionality
> (autocomplete).
> 
> My only issue is that the field I facet on is a string and could have 2 or
> 3 words in it, thus this process will only return strings that begin with
> what the user is typing into my UI search box. It would be useful if I
> could get facets back where I could match somewhere in the facetted field
> (not just at the begninning), i.e. is there a fact.contains method?
> 
> If not I'll just have to code this in my service layer having received all
> facets from SOLR (without the prefix)
> 
> Thanks for any help.
> 
> 
> 
> 
> If you wish to view the St. James's Place email disclaimer, please use the
> link below
> 
> http://www.sjp.co.uk/portal/internet/SJPemaildisclaimer

-- 
Markus Jelsma - CTO - Openindex
http://www.linkedin.com/in/markus17
050-8536600 / 06-50258350