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
© 2004–2021 David Heinemeier Hansson
Licensed under the MIT License.