如何从模块内的类中细化方法

Question

我想优化位于模块内的类中的方法，但尽管尝试优化类，但我无法运行优化后的代码：

module App
  module Entities
    class User
      def self.name(name)
        puts "Original name: #{name}"
      end
    end
  end
end

module RefinedUser
  refine App::Entities::User do
    def self.name(name)
      puts "Refined name: #{name}"
    end
  end
end

class Runner
  def original
    App::Entities::User.name('Forest')
  end

  using RefinedUser

  def refined
    App::Entities::User.name('Forest')
  end
end

r = Runner.new
r.original
r.refined

输出： Original name: Forest Original name: Forest

Answer 1

您需要使用他的singleton_class 细化 App::Entities::User。因为name是一个类方法。

App::Entities::User is ok.

module RefinedUser
  refine App::Entities::User.singleton_class do
    def name(name)
      puts "Refined name: #{name}"
    end
  end
end

using RefinedUser

class Runner
  def refined
    App::Entities::User.name('Forest')
  end
end

r = Runner.new
r.refined
=>Refined name: Forest