更新到 Ruby 3.0 后出现 ArgumentError（参数数量错误（给定 2 个，预期 1））

Question

当我尝试将网站更新到 Ruby 3.0.0 时，出现以下错误：

ArgumentError（参数数量错误（给定 2，预期 1））

 % rails console
Loading development environment (Rails 6.1.0)
irb(main):001:0> puts RUBY_VERSION
3.0.0
irb(main):002:0> puts IceCube::VERSION
0.16.3
irb(main):003:0> schedule = IceCube::Schedule.new
=> #<IceCube::Schedule:0x00007fccfe19cfa8 @start_time=2020-12-27 11:14:30 -0800, @all_recurrence_rules=[], @all_exception_rules=[]>
irb(main):004:0> puts schedule.to_ical
Traceback (most recent call last):
        1: from (irb):4:in `<main>'
ArgumentError (wrong number of arguments (given 2, expected 1))

以下是与 Ruby 2.7.2 相同的命令

% rails console
Loading development environment (Rails 6.1.0)
irb(main):001:0> puts RUBY_VERSION
2.7.2
irb(main):002:0> puts IceCube::VERSION
0.16.3
irb(main):003:0> schedule = IceCube::Schedule.new
=> #<IceCube::Schedule:0x00007f9da3128fe8 @start_time=2020-12-27 11:12:50 -0800, @all_recurrence_rules=[], @all_exception_rules=[]>
irb(main):004:0> puts schedule.to_ical
DTSTART;TZID=PST:20201227T111250

令人困惑的是，它也适用于具有与第一个示例相同的 gem 版本的普通 ruby​​ 脚本

% irb
irb(main):001:0> puts RUBY_VERSION
3.0.0
irb(main):002:0> gem 'ice_cube'
irb(main):003:0> require 'ice_cube'
irb(main):004:0> puts IceCube::VERSION
0.16.3
irb(main):005:0> schedule = IceCube::Schedule.new
=> #<IceCube::Schedule:0x00007ff2fb0d5b88 @start_time=2020-12-27 11:11:02 -0800, @all_recurrence_rules=[], @all_exception_rules=[]>
irb(main):006:0> puts schedule.to_ical
DTSTART;TZID=PST:20201227T111102

有谁知道我可以从哪里开始解决这个问题？我们刚刚开始这个项目，我希望使用 Ruby 3

Answer 1

TL;DR: ice_cube0.16.4已经解决了与 ruby​​ 3.x 的这些兼容性问题，所以只需升级即可。

该问题与ruby​​ 3.0 中如何处理关键字参数以及如何ice_cube将其参数传递给I18n.localize.
因此，提取并简化有错误的代码，这在 ruby​​ < 3 上有效

RUBY_VERSION # "2.7.2"

def foo(*args)
  bar(*args)
end

def bar(object, locale: nil, format: nil, **options)
  puts "object:#{object}"
  puts "locale:#{locale}"
  puts "format:#{format}"
  puts "options:#{options}"
end

foo('date', format: 'whatever')
# object:date
# locale:
# format:whatever
# options:{}

从红宝石 >= 3

RUBY_VERSION # "3.0.0"

def foo(*args)
  bar(*args)
end

def bar(object, locale: nil, format: nil, **options)
  puts "object:#{object}"
  puts "locale:#{locale}"
  puts "format:#{format}"
  puts "options:#{options}"
end

foo('date', format: 'whatever')
# Traceback (most recent call last):
#        16: from /Users/alter/.rbenv/versions/3.0.0/lib/ruby/3.0.0/bundler/cli.rb:24:in `start'
#        15: from /Users/alter/.rbenv/versions/3.0.0/lib/ruby/3.0.0/bundler/vendor/thor/lib/thor/base.rb:485:in `start'
#        14: from /Users/alter/.rbenv/versions/3.0.0/lib/ruby/3.0.0/bundler/cli.rb:30:in `dispatch'
#        13: from /Users/alter/.rbenv/versions/3.0.0/lib/ruby/3.0.0/bundler/vendor/thor/lib/thor.rb:392:in `dispatch'
#        12: from /Users/alter/.rbenv/versions/3.0.0/lib/ruby/3.0.0/bundler/vendor/thor/lib/thor/invocation.rb:127:in `invoke_command'
#        11: from /Users/alter/.rbenv/versions/3.0.0/lib/ruby/3.0.0/bundler/vendor/thor/lib/thor/command.rb:27:in `run'
#        10: from /Users/alter/.rbenv/versions/3.0.0/lib/ruby/3.0.0/bundler/cli.rb:497:in `exec'
#         9: from /Users/alter/.rbenv/versions/3.0.0/lib/ruby/3.0.0/bundler/cli/exec.rb:28:in `run'
#         8: from /Users/alter/.rbenv/versions/3.0.0/lib/ruby/3.0.0/bundler/cli/exec.rb:63:in `kernel_load'
#         7: from /Users/alter/.rbenv/versions/3.0.0/lib/ruby/3.0.0/bundler/cli/exec.rb:63:in `load'
#         6: from /Users/alter/.rbenv/versions/3.0.0/bin/irb:23:in `<top (required)>'
#         5: from /Users/alter/.rbenv/versions/3.0.0/bin/irb:23:in `load'
#         4: from /Users/alter/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/irb-1.3.0/exe/irb:11:in `<top (required)>'
#         3: from (irb):11:in `<main>'
#         2: from (irb):3:in `foo'
#         1: from (irb):5:in `bar'
# ArgumentError (wrong number of arguments (given 2, expected 1))

因此，我看到的修复方法是将参数显式传递给方法：

def foo2(object, **options)
  bar(object, **options)
end

foo2('date', format: 'whatever')
# object:date
# locale:
# format:whatever
# options:{}

或者就涉及的模块而言：

module IceCube
  module I18n
    def self.l(object, **options)
      backend.l(object, **options)
    end
  end
end

并发送 PR，使用你自己的 fork、monkey-patch，任何最适合你的东西。
但最重要的是，请准备好在许多其他 gem 中发现这个问题，因为第一个稳定的 ruby​​ 3 版本刚刚在2 天前发布，所以您可能会在其他 gem 中遇到此类问题，特别是那些未维护的 gem。祝你好运。