Extract superclass

The Extract Superclass refactoring allows you to extract certain members from a selected class into a new base class. The original class will be inherited from the created base class.

To extract a superclass:

Place a caret at a class name or any place within a class.
Select Refactor | Extract/Introduce | Superclass from the main menu.
In the Extract Superclass dialog, specify the superclass name, a directory where it should be placed, and select members to be added:
Click OK. RubyMine will create a superclass in a separate file.

Example

                    # 'cat.rb' file
                    class Cat
                        def breathe
                            puts "inhale and exhale"
                        end
                        def speak
                            puts "Meow"
                        end
                    end
                

                    # 'cat.rb' file
                    require_relative 'mammal.rb'
                    class Cat < Mammal
                        def speak
                            puts "Meow"
                        end
                    end
                    #
                    # 'mammal.rb' file
                    class Mammal < Object
                        def breathe
                            puts "inhale and exhale"
                        end
                    end
                

Last modified: 10 May 2022