Grouping should work: group=true&group.field=source_id&group.limit=3&group.main=true
On Thu, Dec 6, 2012 at 2:35 AM, Tom Mortimer <bano...@gmail.com> wrote: > Sounds like it's worth a try! Thanks Andre. > Tom > > On 5 Dec 2012, at 17:49, Andre Bois-Crettez <andre.b...@kelkoo.com> wrote: > > > If you do grouping on source_id, it should be enough to request 3 times > > more documents than you need, then reorder and drop the bottom. > > > > Is a 3x overhead acceptable ? > > > > > > > > On 12/05/2012 12:04 PM, Tom Mortimer wrote: > >> Hi everyone, > >> > >> I've got a problem where I have docs with a source_id field, and there > can be many docs from each source. Searches will typically return docs from > many sources. I want to restrict the number of docs from each source in > results, so there will be no more than (say) 3 docs from source_id=123 etc. > >> > >> Field collapsing is the obvious approach, but I want to get the results > back in relevancy order, not grouped by source_id. So it looks like I'll > have to fetch more docs than I need to and re-sort them. It might even be > better to count source_ids in the client code and drop excess docs that > way, but the potential overhead is large. > >> > >> Is there any way of doing this in Solr without hacking in a custom > Lucene Collector? (which doesn't look all that straightforward). > >> > >> cheers, > >> Tom > >> > >> > >> -- > >> André Bois-Crettez > >> > >> Search technology, Kelkoo > >> http://www.kelkoo.com/ > > > > Kelkoo SAS > > Société par Actions Simplifiée > > Au capital de € 4.168.964,30 > > Siège social : 8, rue du Sentier 75002 Paris > > 425 093 069 RCS Paris > > > > Ce message et les pièces jointes sont confidentiels et établis à > l'attention exclusive de leurs destinataires. Si vous n'êtes pas le > destinataire de ce message, merci de le détruire et d'en avertir > l'expéditeur. > >
