I think you can combine serveral solr supplied standard function query to achieve this.
similar to: &bf=map(map(div(ms(NOW, expiration),86400000),-10000,0,0), 1,10000,1) Furthermore, you would implement your own function and register it in solrconfig.xml using valueSourceParser tag. 2010/1/29 Andy <angelf...@yahoo.com> > Ah, thank you! > > > > --- On Fri, 1/29/10, Lance Norskog <goks...@gmail.com> wrote: > > > From: Lance Norskog <goks...@gmail.com> > > Subject: Re: boosting unexpired documents > > To: solr-user@lucene.apache.org > > Date: Friday, January 29, 2010, 12:32 AM > > You add a range query on the date, > > and boost documents within that > > date range. Check out the 'boost query' feature of dismax. > > > > http://www.lucidimagination.com/search/document/CDRG_ch07_7.4.2.9 > > > > It's also possible with the standard query parser but a > > pain in the neck: > > > > (value)^2 OR (NOT value) > > > > > > > > On Thu, Jan 28, 2010 at 6:58 PM, Andy <angelf...@yahoo.com> > > wrote: > > > My documents have a field "expiration" that is the > > expiration date of that doc. > > > > > > I want to give a boost to all documents that haven't > > expired. I still want to have expired documents returned, > > but unexpired documents should be given priority. > > > > > > Ideally the boost amount for all unexpired documents > > should be the same. i.e. whether the expiration date is > > tomorrow or a month from now wouldn't make a difference. > > Like wise all expired documents should be treated the same, > > whether it expired yesterday or a year ago. > > > > > > Is that something possible? I read > http://wiki.apache.org/solr/SolrRelevancyFAQ#How_can_I_boost_the_score_of_newer_documents > > but that's not quite what I want. > > > > > > > > > > > > > > > > > > > > -- > > Lance Norskog > > goks...@gmail.com > > > > > > -- 梅旺生
