ValueObject

gistfile1.txt

class User < ActinveRecord::Base
  # address = '1540022 tokyo aa street
  Address = Struct.new(:zip, :street)
  before_save :rebuild_address
  def address_object
    @address_object ||= Address.new(address[0..5], address[6..-1])
  end
  def rebuild_address
    address = @address_object.zip + ...
  end
end


hoge.address_zip
hoge.address_streeet
↓
hoge.address.zip
hoge.address.streeet
hoge.address_objct.zip = '12345678'
hoge.save