playing around with de-coupling data from logic in ORM-based objects

inner_persistence.rb

class Persistence::Mongoid::Operation
  include Mongoid::Document
end

class Persistence::Memory::Operation
end

module Persistence
  def self.included(klass)
    klass.send(:include, InstanceMethods)
  end

  class InstanceMethods
  end
end


class Operation
  WRITABLE_ATTRIBUTES = [:status, :type]
  attr_accessor *WRITABLE_ATTRIBUTES

  include Persistence

  def initialize(attributes, persistence)
  end

  def record
    @record ||= persistence.find(identifier)
  end

  def save
    @record.save
  end
end