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Module: ActiveSupport::DescendantsTracker

Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Extended In:
::AbstractController::Base, ActionCable::Engine, ::ActionController::API, ::ActionController::Base, ::ActionController::Metal, ActionController::Railtie, ActionDispatch::Railtie, ::ActionMailbox::Engine, ::ActionMailer::Base, ::ActionMailer::Preview, ActionMailer::Railtie, ::ActionText::Engine, ActionView::Railtie, ::ActionView::TestCase::TestController, ActiveJob::Railtie, ActiveModel::Railtie, ::ActiveRecord::Base, ActiveRecord::Railtie, ActiveStorage::Engine, ActiveSupport::Railtie, I18n::Railtie, ::Rails::Application, Rails::ApplicationController, ::Rails::Engine, ::Rails::HealthController, Rails::InfoController, Rails::MailersController, ::Rails::Railtie, ::Rails::TestUnitRailtie, Rails::WelcomeController
Defined in: activesupport/lib/active_support/descendants_tracker.rb

Overview

This module provides an internal implementation to track descendants which is faster than iterating through ObjectSpace.

However Ruby 3.1 provide a fast native Class#subclasses method, so if you know your code won’t be executed on older rubies, including DescendantsTracker does not provide any benefit.

Class Method Summary

Instance Method Summary

Class Method Details

.descendants(klass)

See additional method definition at line 104.

[ GitHub ] 

  


# File 'activesupport/lib/active_support/descendants_tracker.rb', line 163



def descendants(klass)
  klass.descendants
end


  








  

    .subclasses(klass)  
  



  

    

See additional method definition at line 100.


  



  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/descendants_tracker.rb', line 158



def subclasses(klass)
  klass.subclasses
end


  







Instance Method Details



  

    #descendants  
  



  

    

See additional method definition at line 109.


  



  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/descendants_tracker.rb', line 179



def descendants
  subclasses = DescendantsTracker.reject!(self.subclasses)
  subclasses.concat(subclasses.flat_map(&:descendants))
end


  








  

    #subclasses  
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/descendants_tracker.rb', line 175



def subclasses
  DescendantsTracker.subclasses(self)
end