I have a use case which requires collapsing on multiple fields.
As a simple example assume I have some movie documents indexed with the
fields: Director, Actor, Title & Release Date. I want to be able to
collapse on Director and Actor, getting the most recent movie (as indicated
by Release Date).
I think the new top hits aggregation almost gets me mostly what I need. I
can create a terms aggregation on Director, with a sub terms aggregation on
Actor, and add a top hits aggregation to that (size 1). Would this be the
proper approach? By traversing over the aggregations I can get all of the
hits that I want - however I can't (have elasticsearch) sort or page them.
It's almost like I'd need a "hitCollector" aggregation which would collect
all search hits generated by it's sub aggregations and allow me to specify
sort and paging information at that level. Thoughts?
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