define_method_attribute

# File activerecord/lib/active_record/attribute_methods/primary_key.rb, line 28
        def define_method_attribute(attr_name)
          super

          if attr_name == primary_key && attr_name != 'id'
            generated_attribute_methods.send(:alias_method, :id, primary_key)
            generated_external_attribute_methods.module_eval               def id(v, attributes, attributes_cache, attr_name)                attr_name = '#{primary_key}'                send(attr_name, attributes[attr_name], attributes, attributes_cache, attr_name)              end, __FILE__, __LINE__
          end
        end