instance method `descendants`

Ruby on Rails 6.1.7.10

Since v5.2.8.1

Available in: v5.2.8.1 v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2

Compare with:

descendants()

Returns an array with all classes that are < than its receiver.

class C; end
C.descendants # => []

class B < C; end
C.descendants # => [B]

class A < B; end
C.descendants # => [B, A]

class D < C; end
C.descendants # => [B, A, D]

Source

# File activesupport/lib/active_support/core_ext/class/subclasses.rb, line 17
  def descendants
    ObjectSpace.each_object(singleton_class).reject do |k|
      k.singleton_class? || k == self
    end
  end

Defined in activesupport/lib/active_support/core_ext/class/subclasses.rb line 17 · View on GitHub · Improve this page · Find usages on GitHub

Defined in Class

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