No, that’s part of a general limitation that you can’t sort by a different criterion than the key that’s used for range (or keyword) matching. I’d like to improve this in the future, whether that’s through adopting Couchbase’s NiQL query language or a procedural API like CoreData’s.
For now you’ll have to query on one key (i.e. the full text keyword) and then postprocess the results to sort them in the order you want.
—Jens