define_method_attribute=

# File activerecord/lib/active_record/attribute_methods/write.rb, line 12
          def define_method_attribute=(attr_name)
            if attr_name =~ ActiveModel::AttributeMethods::NAME_COMPILABLE_REGEXP
              generated_attribute_methods.module_eval("def #{attr_name}=(new_value); write_attribute('#{attr_name}', new_value); end", __FILE__, __LINE__)
            else
              generated_attribute_methods.send(:define_method, "#{attr_name}=") do |new_value|
                write_attribute(attr_name, new_value)
              end
            end
          end