gistfile1.rb

class Diaria < ActiveRecord::Base
	has_many :itens, :class_name => "DiariaItem"

        def gerarItensDiaria
            itens.create({:tipo => 3,
                          :quantidade => diaria_com_pernoite,
                          :valor => 150.00})
	end
end

class DiariaItem < ActiveRecord::Base
	belongs_to :diaria
end