class Address < ActiveRecord::Base
  ADDRESS_MAPPING  = { :address1 => :street1, :address2 => :street2,
    :city => :locality, :state => :region, :zip => :postal_code }
  
  def read_attribute_with_mapping(attr_name)
    read_attribute_without_mapping(ADDRESS_MAPPING[attr_name] || attr_name)
  end
  alias_method_chain :read_attribute, :mapping
  
end