For the following structure:
class Playlist(Document):
items = ListField(EmbeddedDocumentField("PlaylistItem"))
class PlaylistItem(EmbeddedDocument):
song = ReferenceField("Song")
class Song(Document):
title = StringField()
this patch prevents the N+1 queries otherwise required to fetch all
the `Song` instances referenced by all the `PlaylistItem`s.
This allows an index spec to reference arbitrary keys of a DictField:
class MyDoc(Document):
frobs = DictField()
meta = {
"indexes": ["frobs.fmep", "frobs.gorp"],
}
Clay McClure