monkey.rb

# The default DM property doesn't support serials, so we add it in here
module DataMapper
  class Property
    class String
      accept_options :serial
    end
  end
end

module DataMapper::Salesforce
  class Property
    class SFSerial < DataMapper::Property::String
      primitive ::String
      length 15
      serial true

      def self.dump(value, property)
        value[0..14] unless value.blank?
      end
    end
  end
end