ruby-on-rails - Ruby 2.0 如何在包含模块后从模块中取消包含模块？

Question

module X
end

module Y
end

module Z
  #TODO include X replacement of including Y
  #TODO include Y replacement of including X
end

有没有办法解决 ruby​​ 不包含 uninclude 关键字的问题？？

Answer 1

如果您真的需要这种功能，您可以使用 refinements 来实现.

class Foo
end

module X
  def x
    puts 'x'
  end
end

module Y
end

module R
  refine Foo do
    include X
    include Y
  end
end

# In a separate file or class
using R
# Foo now includes X and Y
Foo.new.x

# In a different file or class
# Foo no longer includes X and Y
Foo.new.x # NoMethodError