Format mongoId for the frontend

MongoDb returns ids of the form _id. I would like to make sure that the frontend (ember.js app) always receives id instead. I could write a serializer on the client, but I think there's probably a much easier solution that could either be implemented at the Database level or within the express server app.

I tried using virtual attributes, but this did'nt seem to work.

ActionSchema = mongoose.Schema(
  title: type: mongoose.Schema.Types.Mixed
  reduction: type: Number
  description: type: mongoose.Schema.Types.Mixed
  category: type: String
)

ActionSchema.virtual('id').get(->
  @_id
)