Representing relationships in Lotus::Model

conference.rb

class Conference
  include Lotus::Entity
  
  attributes :title, :call_code, :technician_id
  
  # Are the following 2 methods correct for representing the relationship to Technician
  def technician
    @technician ||= TechnicianRepository.find @technician_id
  end
  
  def technician=(technician)
    @technician = technician
    @technician_id = technician.id
  end
  
  def call_code
    @call_code ||= rand 1000...9999
  end
end

conference_repository.rb

class ConferenceRepository
  include Lotus::Repository
end

mapping.rb

collection :conferences do
  entity Conference
  repository ConferenceRepository
  
  attribute :id, Integer
  attribute :title, String
  attribute :call_code, Integer
  attribute :technician_id, Integer
end

collection :technicians do
  entity Technician
  repository TechnicianRepository
  
  attribute :id, Integer
  attribute :name, String
  attribute :email, String
end

technician.rb

class Technician
  include Lotus::Entity
  
  attributes :name, :email
end

technician_repository.rb

class TechnicianRepository
  include Lotus::Repository
end