Hi there,

I am observing an issue with update_attributes and mongoid master (upcoming 3.1) when model is accepting nested attributes for many embedded models.

This is the document structure:

project

This is the moped output when updating one query_atom's "identifier" by calling

@query.update_attributes params

3.0 (works):

MOPED: 127.0.0.1:27017 UPDATE database=test collection=projects selector=

{"_id"=>"5118eafa46f6d6b461000001"}

update={"$set"=>{"query.updated_at"=>2013-02-11 12:58:34 UTC, "query.query_atoms.0.identifier"=>53}} flags=[] (0.8774ms)

3.1 (doesn't work):

MOPED: 127.0.0.1:27017 UPDATE database=test collection=projects selector=

{"_id"=>"5118e6f146f6d6f0da000001", "query._id"=>"5118e6f146f6d6f0da000002"}

update={"$set"=>{"query.updated_at"=>2013-02-11 12:41:21 UTC, "query.query_atoms.$.identifier"=>81}} flags=[] (0.4168ms)

Any thoughts on what might be going on? I'd be happy to provide more details.