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Module: ActiveSupport::DescendantsTracker

Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Extended In:
::AbstractController::Base, ::ActionController::Base, ::ActionController::Metal, ::ActionController::Middleware, ::ActionMailer::Base, ::ActionMailer::Preview, ::ActionView::TestCase::TestController, ::ActiveRecord::Base, ::ActiveRecord::SchemaMigration, Rails::ApplicationController, Rails::InfoController, Rails::MailersController, 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.

Class Method Summary

Instance Method Summary

Class Method Details

.clear

[ GitHub ] 

  


# File 'activesupport/lib/active_support/descendants_tracker.rb', line 18



def clear
  if defined? ActiveSupport::Dependencies
    @@direct_descendants.each do |klass, descendants|
      if ActiveSupport::Dependencies.autoloaded?(klass)
        @@direct_descendants.delete(klass)
      else
        descendants.reject! { |v| ActiveSupport::Dependencies.autoloaded?(v) }
      end
    end
  else
    @@direct_descendants.clear
  end
end


  








  

    .descendants(klass)  
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/descendants_tracker.rb', line 12



def descendants(klass)
  arr = []
  accumulate_descendants(klass, arr)
  arr
end


  








  

    .direct_descendants(klass)  
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/descendants_tracker.rb', line 8



def direct_descendants(klass)
  @@direct_descendants[klass] || []
end


  








  

    .store_inherited(klass, descendant)  
  



  

    

This is the only method that is not thread safe, but is only ever called during the eager loading phase.


  



  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/descendants_tracker.rb', line 34



def store_inherited(klass, descendant)
  (@@direct_descendants[klass] ||= []) << descendant
end


  







Instance Method Details



  

    #descendants  
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/descendants_tracker.rb', line 56



def descendants
  DescendantsTracker.descendants(self)
end


  








  

    #direct_descendants  
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/descendants_tracker.rb', line 52



def direct_descendants
  DescendantsTracker.direct_descendants(self)
end


  








  

    #inherited(base)  
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/descendants_tracker.rb', line 47



def inherited(base)
  DescendantsTracker.store_inherited(self, base)
  super
end