如何在扩展ActiveSupport :: Concern的情况下在另一个模块中使用模块？

Question

我这有，我想用number_front方法内基地::助手在报告::丰田，它给我一个错误：undefined method number_front

module Base 
    module Helper 
    def number_front(member) 
     "***#{member}" 
    end 
    end 
end 

module Report 
    module Toyota 
    extend Base::Helper # not sure here, what's the right way to include it 
    extend ActiveSupport::Concern 

    included do 
     comma do 
     model(mark: 'Toyota') { |number| number_front(number) if number } 
     end 
    end 
    end 
end 

class Car 
    include Report::Toyota 
end 

Answer 1

而不是

extend Base::Helper 

使用

include Base::Helper 

区别在于include会将该方法添加为实例方法。