This module provides an internal implementation to track descendants which is faster than iterating through ObjectSpace.
# File activesupport/lib/active_support/descendants_tracker.rb, line 62 def descendants(klass) klass.descendants end
# File activesupport/lib/active_support/descendants_tracker.rb, line 11 def direct_descendants(klass) ActiveSupport::Deprecation.warn(<<~MSG) ActiveSupport::DescendantsTracker.direct_descendants is deprecated and will be removed in Rails 7.1. Use ActiveSupport::DescendantsTracker.subclasses instead. MSG subclasses(klass) end
# File activesupport/lib/active_support/descendants_tracker.rb, line 138 def store_inherited(klass, descendant) (@@direct_descendants[klass] ||= DescendantsArray.new) << descendant end
This is the only method that is not thread safe, but is only ever called during the eager loading phase.
# File activesupport/lib/active_support/descendants_tracker.rb, line 58 def subclasses(klass) klass.subclasses end
# File activesupport/lib/active_support/descendants_tracker.rb, line 88 def descendants subclasses.concat(subclasses.flat_map(&:descendants)) end
# File activesupport/lib/active_support/descendants_tracker.rb, line 92 def direct_descendants ActiveSupport::Deprecation.warn(<<~MSG) ActiveSupport::DescendantsTracker#direct_descendants is deprecated and will be removed in Rails 7.1. Use #subclasses instead. MSG subclasses end
# File activesupport/lib/active_support/descendants_tracker.rb, line 153 def inherited(base) DescendantsTracker.store_inherited(self, base) super end
# File activesupport/lib/active_support/descendants_tracker.rb, line 82 def subclasses subclasses = super subclasses.reject! { |d| @@excluded_descendants[d] } subclasses end
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