. "Ruby/Rails" . . "controller" . . . . . "Ruby-on-Rails" . . . . . . . . . . "Ruby on Rails Active Record Migration" . . . . . . "Ruby" . . "Rails" . "Ruby on Rails" . . . . . . . . . . . . . . . "Action Pack" . . . . . . "Ruby on Rails-Ruby framework" . . "Ruby on Rails" .