Here is the jira that allowed for multiple collapse: https://issues.apache.org/jira/browse/SOLR-14073
This was a bug fix. I don't think this was ever documented as a feature, but it should work with Solr 8.5 and beyond. Here is the follow-on work for expand: https://issues.apache.org/jira/browse/SOLR-14329 Joel Bernstein http://joelsolr.blogspot.com/ On Thu, Sep 8, 2022 at 1:21 AM Daxesh Parmar <daxeshparmar0...@gmail.com> wrote: > Hii Joel, Thanks for the reply. > But I was not able to find any official documentation stating multiple > collapses. It would be helpful if you got any article about that. > Also the second collapse would be on the main result set I believe. We > can't do that on expanded results? > > > On Tue, 6 Sept 2022 at 20:27, Joel Bernstein <joels...@gmail.com> wrote: > > > I believe this is supported on newer of Solr 8.5 and above. The expand > > code has a specific comment that deals with multiple collapse fields: > > > > // if there are multiple collapse pick the low cost one > > // if cost are equal then first one is picked > > > > So, you can specify a cost on the collapse filter which will control the > > order of the collapse and select the expand field. > > > > There is also an undocumented expand parameter: > > > > expand.field > > > > This will allow you to specify which field to expand on. > > > > Collapse will support more than one collapse with versions Solr 8.5+. > > > > Joel Bernstein > > http://joelsolr.blogspot.com/ > > > > > > On Tue, Sep 6, 2022 at 8:29 AM Daxesh Parmar <daxeshparmar0...@gmail.com > > > > wrote: > > > > > Hii, I wanted to know whether solr provides a feature to do a second > > > collapse on expanded results or not? > > > For my use case I am doing collapse of fieldA, and getting > > expandedResults. > > > I need the expanded results in such a way that all the values under > > fieldB > > > are present in expandedResults. > > > > > > Eg. I am doing a collapse on MovieCategory, and each MovieCategory > will > > > have a subcategory, > > > So how Can I ensure I get all Possible Subcategories in expanedResults. > > > (Can we do a second collapse on subCategories also?) > > > > > > > > > Thanks. > > > Daxesh. > > > > > >
