class Ncm < ApplicationRecord
	has_paper_trail

	validates_length_of :codigo, is: 8
	validates_presence_of :codigo, :descricao

	has_many :itens, class_name: 'Base::Item', dependent: :restrict_with_exception


	def codigo_e_descricao
		self.codigo + " - " + self.descricao
	end
end