ruby on rails - Mongoid references_many ids array population -

i have question regarding mongoid id storage references_many.

suppose have following classes:

class   include mongoid::document   field :name    attr_accessible :name, :b_ids   references_many :bs, :stored_as :array, :inverse_of :a end  class b   include mongoid::document   field :name    attr_accessible :name, :a_id   referenced_in :a end 

if following:

a = a.create(:name => "a1") b = b.create(:name => "b1") b.a = 

should expect a.b_ids array array contains b's id?

the behaviour seeing b.a_id contains a's id, a.b_ids not contain b's id.

is id array on a's side supposed manually updated?

btw, if a.bs << b, a.b_ids gets updated correctly.

to answer own question, id arrays not automatically set @ moment. feature planned included once refactor branch of mongoid released.

this info comes thread: http://groups.google.com/group/mongoid/browse_thread/thread/9ac74dc9a08a5fe2/d3a7c2404b67abfa

until then, ids have tracked manually.

an example be:

class   include mongoid::document   field :name    attr_accessible :name, :b_ids   references_many :bs, :stored_as :array, :inverse_of :a    def add_b b     bs << b     self.save   end    def remove_b b     b_ids.delete b.id     b.save   end end  class b   include mongoid::document   field :name    attr_accessible :name, :a_id   referenced_in :a end  = a.create(:name => "a1") b = b.create(:name => "b1") b.a = a.add_b b