attribute.rb Ruby on Rails 5.1.2 attribute.rb activesupport/lib/active_support/core_ext/class/attribute.rb on GitHub Last modified: 2017-07-12 08:38:52 -0700 Required Files active_support/core_ext/kernel/singleton_class active_support/core_ext/module/remove_method active_support/core_ext/array/extract_options Namespace CLASS Class