Re: [VuFind-Tech] Boosting search results with a field value

[Mark N. <mn...@tu...>]

Thanks for the help Till.
That suggestion also helped me to get fix another problem I was having.  
I was having trouble getting multiple boosts to work without having the 
boost query filter the results.  However, combining them with an or 
statement seems to work.

I think I have this working now although there is probably a better way 
of doing this. Here is what I'm adding to the query in the search method:
//Apply automatic boosting (only to biblio queries)
if (preg_match('/.*biblio.*/', $this->host)){
     if (isset($options['qt']) && $options['qt'] == 'dismax'){
         //Boost by number of holdings
         $options['bq'] = '_val_:"scale(num_holdings,1,200)"^4';
         //Boost english items
         $options['bq'] = $options['bq'] . ' OR language:"English"^300';
         //Boost books and DVDS
         $options['bq'] = $options['bq'] . ' OR format:"DVD"^200';
         $options['bq'] = $options['bq'] . ' OR format:"Book"^200';
     }else{
          $options['q'] = $options['q'] . ' || 
_val_:"scale(num_holdings,1,200)"^2';
          $options['q'] = $options['q'] . ' || language:"English"^300';
          $options['q'] = $options['q'] . ' || language:"DVD"^200';
          $options['q'] = $options['q'] . ' || language:"Book"^200';
      }
  }

That does seem to be working and I can definitely see that the correct 
records are moving to the top of the results.

If there is a better way to handle this let me know.  I would also like 
to be able to combine the format boosting into a single query, but I 
haven't gotten that to work correctly yet.

Thanks for your help!

- Mark Noble

On 6/26/2010 5:07 AM, Till Kinstler wrote:
> First: bf abd bq are only available in the DisMax handler. To boost
> search results depending on (static) fields values with the standard
> handler we add additional ORed clauses (though that doesn't work for bf
> type queries, you can use a FunctionQuery for that:
> http://wiki.apache.org/solr/FunctionQuery)...
> If the DisMax is not defined as your default query handler (it is not in
> VuFind's standard Solr config), try adding the parameter qt=dismax to
> the query URL.
> num_holdings contains a numeric value and is defined as some kind of
> numeric field type (though I'm not sure, if the latter is necessary)?
>
> Till
>
> Am 26.06.2010 02:58, schrieb Mark Noble:
>    
>> We have added the total number of holdings to our Solr index and now I'm
>> trying to boost records with higher numbers of holdings in the result.
>>
>> The documentation that I have found online states that you can add the
>> bf or bq parameters to the query to boost fields at runtime. To test
>> this, I'm just calling solr via a URL with a URL similar to the following:
>> http://localhost:8080/solr/biblio/select/?q=*:*&bf=num_holdings^1000&fl=title,num_holdings,score&debugQuery=on
>>
>> When I do this, my scores all come back as 1.0 and the titles seem to be
>> in random order.  Can anyone point me in the right direction to have the
>> boost apply correctly?
>>
>> If I can get this to work properly, I would also like to boost titles
>> which are owned by the local library when I have a preferred branch or
>> when I'm in the library.
>>
>> Thanks for your help!
>>
>> - Mark Noble
>>
>> ------------------------------------------------------------------------------
>> This SF.net email is sponsored by Sprint
>> What will you do first with EVO, the first 4G phone?
>> Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first
>> _______________________________________________
>> Vufind-tech mailing list
>> Vuf...@li...
>> https://lists.sourceforge.net/lists/listinfo/vufind-tech
>>      
>
>