Method: Object#ancestral_trait

Defined in:
lib/m4dbi/traits.rb

#ancestral_trait ⇒ Object

builds a trait from all the ancestors, closer ancestors overwrite distant ancestors

class Foo

trait :one => :eins
trait :first => :erstes

end

class Bar < Foo

trait :two => :zwei

end

class Foobar < Bar

trait :three => :drei
trait :first => :overwritten

end

Foobar.ancestral_trait :two=>:zwei, :one=>:eins, :first=>:overwritten



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# File 'lib/m4dbi/traits.rb', line 60

def ancestral_trait
  if respond_to?(:ancestors)
    ancs = ancestors
  else
    ancs = self.class.ancestors
  end
  ancs.reverse.inject({}){|s,v| s.merge(v.trait)}.merge(trait)
end