当我试图将我们的网站更新到Ruby 3.0.0时，我收到了以下错误：
ArgumentError(错误的参数数量(给定2个，应为1个((
% 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Ruby 2.7.2的相同命令，可用于
% 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，它还可以使用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
有人知道我从哪里开始解决这个问题吗？我们刚刚开始这个项目，我希望使用Ruby 3
TL；DR:ice_cube0.16.4已经解决了ruby 3.x的这些兼容性问题，所以只需升级即可。
这个问题与ruby 3.0中如何处理关键字参数以及ice_cube如何将其参数传递给I18n.localize有关
因此，提取并简化了有缺陷的代码，这在ruby上起到了作用<3
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ruby>=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，我可以看到的解决方案是明确地将参数传递给方法：
def foo2(object, **options)
bar(object, **options)
end
foo2('date', format: 'whatever')
# object:date
# locale:
# format:whatever
# options:{}
或者就所涉及的模块而言：
module IceCube
module I18n
def self.l(object, **options)
backend.l(object, **options)
end
end
end
发送公关，使用你自己的叉子，猴子补丁，任何最适合你的
但最重要的是，要做好准备，在许多其他宝石中发现这个问题，因为第一个稳定的ruby 3版本在两天前刚刚发布，所以你可能会在其他宝石中遇到这种类型的问题，特别是未经维护的宝石。祝你好运