Recycle App with Repository #railsisnotyourapp

gistfile1.rb

# RecycleApp

module RecycleApp
  class << self
    attr_accessor :can_repository
    def config
      yield self
    end
  end
end

class RecycleApp::Can
  attr_reader :id, :amount

  def initialize(repository=RecycleApp::can_repository)
    @amount = 0
    @repository = repository
  end

  def incr
    @amount += 1
    @repository.store(self)
  end
end

# Rails App

RecycleApp.config do |config|
    config.can_repository = CanRepository.new
end

class CanRepository
  def store(can)
    can.id ? create(can) : update(can)
  end
  
  def create(can)
    new_can = Can.create!(:amount => can.amount)
    can.id = new_can.id
  end
  
  def update(can)
    update_can = can.find(can.id)
    update_can.attributes(:amount => amount)
    update_can.save!
  end
end

class Can < ActiveRecord
end

# Usage

c = RecycleApp::Can.new
c.incr