I happen to remember this JIRA: https://issues.apache.org/jira/browse/SOLR-2462

be a bit careful if you use collate with 3.1 or 3.2...

Best
Erick

On Fri, Jul 6, 2012 at 10:36 AM, Dyer, James <james.d...@ingrambook.com> wrote:
> If you're using Solr3.1 or higher, you can do this.  See 
> http://wiki.apache.org/solr/SpellCheckComponent#spellcheck.collate .  Here's 
> a summary:
>
> - specify "spellcheck.collate=true" to get a re-written query made from the 
> individual word suggestions.
>
> - specify "spellcheck.maxCollationTries" to something >0 (10, perhaps) to 
> have it "try" the collation possibilities against the index before returning 
> them to the user.  This means that all collations returned will be guaranteed 
> to return hits.
>
> - specify "spellcheck.collateExtendedResults=true" if you want hit counts for 
> the collation queries and also details on which original word was replaced by 
> which new word.
>
> - specify "spellcheck.maxCollations" to something >1 if you want to get more 
> than 1 collation returned.
>
> If on 4.0-alpha:
>
> - maybe specify "spellcheck.collateParam.mm=100%", if your original query had 
> a very low "mm" value.  This will make the collations returned more 
> meaningful to the user.
>
> - maybe specify "spellcheck.alternativeTermCount" to something >0 if you want 
> the spellchecker to consider that the user might have misspelled words even 
> though the misspelling occurs somewhere in the index.
>
> James Dyer
> E-Commerce Systems
> Ingram Content Group
> (615) 213-4311
>
>
> -----Original Message-----
> From: ninaddesai82 [mailto:desai.ni...@gmail.com]
> Sent: Friday, July 06, 2012 6:04 AM
> To: solr-user@lucene.apache.org
> Subject: Better (and valid) Spellcheck in combination with other parameters 
> with at least one occurance
>
> Hi,
> I am trying to implement solr search with spellcheck. -
>
> My current seach works like this - I have some specific criteria for every
> search query. i.e. If I am hitting search with q=restaurants , I also pass
> another param say c=mumbai. So solr returns me restaurants in mumbai.
>
> Now I want to implement spellcheck, but at the same time I also want to make
> sure that whatever results my spellcheck is providing, are valid (means have
> at least one occurance in combination with my other param as in c=city). I
> am not able to decide how to achieve that.
>
> i.e.
> If I pass say "hangry" to solr with spell check then spell check retuerns
> few suggestions like "hungry", "angry"
> However I want to suggest user only those suggestions which have hitcounts
> in my data with common field as in c=mumbai.
> Otherwise what happens is - solr returns me some suggestion words "hungry ,
> angry" and if they dont have ny records with combination of city, it returns
> no result, which is bad user experience.
>
> so ideally Solr should return me suggestion for only those words which have
> at least 1 count for that suggestion with mumbai.
>
> I am currently firing 2 queries to luscene in order to achieve this
> Query one - spellcheck - this gives me word suggestns
> Query two - with given words in spell check i run facet query to get
> occurance counts to check which ones are valid.
> But this seems like unnecessary over head (Query two - with facet takes too
> long to respond as well). And I am trying to find more optimized way to do
> this.
>
> Can anyone suggest me how to do that ?
>
> thanks,
> ndesai
>
> --
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