Ruby method_missing类和模块中的用法

Question

如何method_missing在课堂和混合模块中使用？

module Bar
  def method_missing(name, *args)
    p 'Bar' if name =~ /bar/
  end
end

class Foo
  include Bar

  def method_missing(name, *args)
    p 'Foo' if name =~ /foo/
  end
end

a = Foo.new
a.foofoo => "Foo"
a.barbar => nil

Answer 1

用途super:

module Bar
  def method_missing(name, *args)
    p 'Bar' if name =~ /bar/
  end
end

class Foo
  include Bar

  def method_missing(name, *args)
    p 'Foo' if name =~ /foo/
    super # ? HERE
  end
end

a = Foo.new
a.foofoo => "Foo"
a.barbar => "Bar"

正如@ndn在评论中指出的那样,人们可能会仔细处理不同的结果.super可能会被调整为当且仅当Foo#method_missing实现没有成功时才使用:

  def method_missing(name, *args)
    case name
    when /foo/ then p 'Foo'
    # .....
    else super # ? HERE
    end
  end