Hey folks, we're at the point of figuring out the API for block join child rollups for the JSON Facet API. We already have simple block join faceting: http://yonik.com/solr-nested-objects/ So now we need an API to carry over more information from children to parents (say rolling up average rating of all the reviews to the corresponding parent book objects).
I've gathered some of my notes/thoughts on the API here: https://issues.apache.org/jira/browse/SOLR-8998 Feedback welcome, and we can discuss here in this thread rather than cluttering the JIRA. -Yonik
