I\'m using ember-data with rails and MongoDB and am having problem with the way IDs are stored in MongoDB - in a _id field.
Ember-data will use id as the default field f
The second part of joscas's answer fixed the id issue for me with Rails4/Ruby2 except I had to .to_s the _id.
class UserSerializer < ActiveModel::Serializer attributes :id, :name, :email def id object._id.to_s end end