You may want to take a look at new Solr feature of Streaming API & Expressions https://issues.apache.org/jira/browse/SOLR-7584?filter=12333278 for making joins between collections.
On Wed, Oct 7, 2015 at 9:42 AM, Ryan Josal <r...@josal.com> wrote: > I developed a join transformer plugin that did that (although it didn't > flatten the results like that). The one thing that was painful about it is > that the TextResponseWriter has references to both the IndexSchema and > SolrReturnFields objects for the primary core. So when you add a > SolrDocument from another core it returned the wrong fields. I worked > around that by transforming the SolrDocument to a NamedList. Then when it > gets to processing the IndexableFields it uses the wrong IndexSchema, I > worked around that by transforming each field to a hard Java object > (through the IndexSchema and FieldType of the correct core). I think it > would be great to patch TextResponseWriter with multi core writing > abilities, but there is one question, how can it tell which core a > SolrDocument or IndexableField is from? Seems we'd have to add an > attribute for that. > > The other possibly simpler thing to do is execute the join at index time > with an update processor. > > Ryan > > On Tuesday, October 6, 2015, Mikhail Khludnev <mkhlud...@griddynamics.com> > wrote: > > > On Wed, Oct 7, 2015 at 7:05 AM, Ali Nazemian <alinazem...@gmail.com > > <javascript:;>> wrote: > > > > > it > > > seems there is not any way to do that right now and it should be > > developed > > > somehow. Am I right? > > > > > > > yep > > > > > > -- > > Sincerely yours > > Mikhail Khludnev > > Principal Engineer, > > Grid Dynamics > > > > <http://www.griddynamics.com> > > <mkhlud...@griddynamics.com <javascript:;>> > > >
