Models for Modular API with Grape and Rails

contact_info.rb

class ContactInfo
  include Mongoid::Document

  field :address_line, :type => String
  field :city, :type => String
  field :country, :type => String
  field :zipcode, :type => String
  field :state, :type => String

  embeds_many :phone_numbers
end

phone_number.rb

class PhoneNumber
  include Mongoid::Document

  field :country_code, :type => String
  field :area_code, :type => String
  field :number, :type => String

  def formatted_number
    ["+"+country_code,area_code,number].join("-")
  end

end

user.rb

class User
  include Mongoid::Document

  field :first_name, :type => String
  field :last_name, :type => String
  field :email, :type => String
  field :username, :type => String
  
  embeds_one :contact_info
end