: The join results in only "Post" type documents, so the intersection
: with fq=state_s:California (which only appears on "User" type
: documents) should always give back 0 documents. You need to apply
: that filter before the join translates between these two document
: types.
:
: {!join from=self_id_i to=user_id_i}all_posts_text:"lucene" +state_s:California
I think the real key to understanding join is to remember that it's just a
special type of query parser that wraps another query, transforming the
set of docs matched by the inner query into a new doc set based on the
join fields.
Anything you want to do in relation to that "inner" query needs to be
part of the inner query.
FYI: I recently added some more examples to the wiki to try and make the
join parser a little more clear...
https://wiki.apache.org/solr/Join
-Hoss
