define_attr_method

# File activemodel/lib/active_model/attribute_methods.rb, line 69
      def define_attr_method(name, value=nil, deprecation_warning = true, &block) #:nodoc:
        # This deprecation_warning param is for internal use so that we can silence
        # the warning from Active Record, because we are implementing more specific
        # messages there instead.
        #
        # It doesn't apply to the original_#{name} method as we want to warn if
        # people are calling that regardless.
        if deprecation_warning
          ActiveSupport::Deprecation.warn("define_attr_method is deprecated and will be removed without replacement.")
        end

        sing = singleton_class
        sing.class_eval           remove_possible_method :'original_#{name}'          remove_possible_method :'_original_#{name}'          alias_method :'_original_#{name}', :'#{name}'          define_method :'original_#{name}' do            ActiveSupport::Deprecation.warn(              "This method is generated by ActiveModel::AttributeMethods::ClassMethods#define_attr_method, " \              "which is deprecated and will be removed."            )            send(:'_original_#{name}')          end, __FILE__, __LINE__ + 1
        if block_given?
          sing.send :define_method, name, &block
        else
          # If we can compile the method name, do it. Otherwise use define_method.
          # This is an important *optimization*, please don't change it. define_method
          # has slower dispatch and consumes more memory.
          if name =~ NAME_COMPILABLE_REGEXP
            sing.class_eval               def #{name}; #{value.nil? ? 'nil' : value.to_s.inspect}; end, __FILE__, __LINE__ + 1
          else
            value = value.to_s if value
            sing.send(:define_method, name) { value }
          end
        end
      end