You have to set group.ngroups=true (see http://wiki.apache.org/solr/FieldCollapsing). Be aware that including the number of groups is a surprisingly heavy operation, though.
Teun 2013/2/25 Nicholas Ding <nicholas...@gmail.com> > Hello, > > I grouped the result, and set group.main=true. I was expecting the numFound > equals to the number of groups, but actually it was not. > > How do I get the number of groups? > > Thanks > Nicholas >
