代码在 Ruby 2.7 中运行良好，但在 Ruby 2.6.3 中运行不佳

Question

我在 Ruby 2.7 中编写了具有装饰器功能的代码。它在该版本中运行良好，但相同的代码在 Ruby 2.6 中无法正常运行。如果我删除装饰器的调用，即 wrapper_function，那么代码将在 Ruby 2.6 中执行，但这不是我想要的功能。那么我这里的错误是什么，我该如何纠正它？

已编辑

#test.rb

FAMILYTREE = {
  "name": "Royal Family",
  "members": [
    [
      "King",
      "Male",
      "no mother"
    ],
    [
      "Queen",
      "Female",
      "no mother",
      "King"
    ]
    
  ]
}

module Wrapper
  def wrapper_function(func_name)
    new_name_for_old_function = "#{func_name}_old".to_sym
    alias_method(new_name_for_old_function, func_name)
    define_method(func_name) do |*args, **kwargs|
      begin
        result = send(new_name_for_old_function, *args, **kwargs)
        if result.instance_of?(Array) && result.any?
          result.map(&:name).join(' ')
        end
      end
    end
  end
end

class Person
  attr_accessor :name, :gender, :mother

  def initialize(name, gender, mother_name=nil)
    @name = name
    @gender = gender
    @mother = mother
  end

end

class Family
  extend Wrapper
  attr_accessor :family_name, :members

  def initialize(family_name)
    @family_name = family_name
    @members = []
  end

  def add_member(person_name, gender, mother_name, spouse_name)

    person = Person.new(person_name, gender, mother_name)

    members << person
  end
  wrapper_function(:add_member)
end


def create_family_tree(family_tree)
  #Initializing the family
  family_name = family_tree[:name]
  members = family_tree[:members]

  family = Family.new(family_name)
  members.each do |name, gender, mother_name, spouse_name|
    family.add_member(name, gender, mother_name, spouse_name)
  end
  family
end

fam = create_family_tree(FAMILYTREE)

以上是显示问题的完整文件：给运行吧：ruby test.rb 如果版本为2.7.1，则代码执行无误。如果是 2.6.3，则会出现此错误： test.rb:54:in add_member: wrong number of arguments (given 5, expected 4) (ArgumentError)

在 wrapper_function 行 23 和 25 中，如果我删除 **kwargs 则程序将执行并在版本 2.6.3 中给出所需的结果。那为什么会这样呢？

Answer 1

是 - 删除 wrapper_function 中的两个 **kwargs 将使其在 2.6.x 和 2.7.x

中都有效

与Ruby 2.7 deprecating automatic conversion from a hash to keyword arguments

有关

代码在 Ruby 2.7 中运行良好，但在 Ruby 2.6.3 中运行不佳

Code works well in Ruby 2.7 but not in Ruby 2.6.3

ruby

ruby-2.6

ruby-2.7