[Solr 6.6 w/SolrCloud]: Subqueries - Solr returning a 400 status code, Bad Request when attempting to use the [subquery] transformer
*Context and background:*
I have a set of documents, that initially are quite deeply nested, but as
part of the pre-index step the documents are flattened, such that they are
at most 2 levels deep - a root document and a list of child documents. Each
child document is given some metadata that indicates its relationship to
other child documents and the root document in the index.
*The current situation:*
There exists a request for me to produce information out of this data, but I
am attempting to return only the relevant fields in the child document(s).
My reading (here and in other sites) as lead me to believe that the [child]
transformer is ill suited for this task - feel free to correct me if I am