There's no documentation for this item.

Source Code

# File active_support/core_ext/class/inheritable_attributes.rb, line 128
def inherited_with_inheritable_attributes(child)
  inherited_without_inheritable_attributes(child) if respond_to?(:inherited_without_inheritable_attributes)

  if inheritable_attributes.equal?(EMPTY_INHERITABLE_ATTRIBUTES)
    new_inheritable_attributes = EMPTY_INHERITABLE_ATTRIBUTES
  else
    new_inheritable_attributes = inheritable_attributes.inject({}) do |memo, (key, value)|
      memo.update(key => (value.dup rescue value))
    end
  end

  child.instance_variable_set('@inheritable_attributes', new_inheritable_attributes)
end