primary_key.rb Ruby on Rails 5.1.2 primary_key.rb activerecord/lib/active_record/attribute_methods/primary_key.rb on GitHub Last modified: 2017-07-12 08:38:52 -0700 Required Files set Namespace MODULE ActiveRecord MODULE ActiveRecord::AttributeMethods MODULE ActiveRecord::AttributeMethods::PrimaryKey MODULE ActiveRecord::AttributeMethods::PrimaryKey::ClassMethods