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Paulo Diniz paulodiniz

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class Carro
def Carro.valor_do_financiamento(carro_id)
carro = Carro.find(carro_id)
#calcula valor
return valor_total
end
end
carro = Carro.find(params[:carro_id]) # carrega o carro que o usuario passou no POST
valor_do_financiamento = Carro.valor_do_financiamento(carro.id)
module Mst
def self.included(base)
base.extend(ClassMethods)
end
module ClassMethods
def before(method_name)
m = instance_method(method_name)
define_method method_name do |*args, &block|