I want to configure Field Collapsing, but my target field is multi-valued (e.g. the field I want to group on has a variable # of entries per document, 1-N entries).
I read on the wiki (http://wiki.apache.org/solr/FieldCollapsing) that grouping doesn't support multi-valued fields yet. Anything in the works on that front by chance? Any common work-arounds?