我正在将Rails 5.1应用程序升级到5.2。我已经更新了我的所有宝石，包括Rails，最后运行了rails app:update，它为我的rails应用程序创建了新文件。
具体来说，创建了两个与我有关的文件。首先在config/initializers有一个new_framework_defaults_5_2.rb文件，第二个（在同一目录中）有一个new_framework_defaults.rb。第一个文件只包含注释，但第二个文件包含一些新的配置选项。其中一个选项是：
ActiveSupport.halt_callback_chains_on_return_false = false
此方法调用会引发undefined_method错误。这段代码需要做什么？
这是堆栈跟踪：
Traceback (most recent call last):
73: from bin/rails:4:in `<main>'
72: from /usr/local/rvm/gems/ruby-2.5.1/gems/activesupport-5.2.0/lib/active_support/dependencies.rb:283:in `require'
71: from /usr/local/rvm/gems/ruby-2.5.1/gems/activesupport-5.2.0/lib/active_support/dependencies.rb:249:in `load_dependency'
70: from /usr/local/rvm/gems/ruby-2.5.1/gems/activesupport-5.2.0/lib/active_support/dependencies.rb:283:in `block in require'
69: from /usr/local/rvm/gems/ruby-2.5.1/gems/bootsnap-1.3.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:29:in `require'
68: from /usr/local/rvm/gems/ruby-2.5.1/gems/bootsnap-1.3.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:20:in `require_with_bootsnap_lfi'
67: from /usr/local/rvm/gems/ruby-2.5.1/gems/bootsnap-1.3.0/lib/bootsnap/load_path_cache/loaded_features_index.rb:65:in `register'
66: from /usr/local/rvm/gems/ruby-2.5.1/gems/bootsnap-1.3.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `block in require_with_bootsnap_lfi'
65: from /usr/local/rvm/gems/ruby-2.5.1/gems/bootsnap-1.3.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `require'
64: from /usr/local/rvm/gems/ruby-2.5.1/gems/railties-5.2.0/lib/rails/commands.rb:18:in `<main>'
63: from /usr/local/rvm/gems/ruby-2.5.1/gems/railties-5.2.0/lib/rails/command.rb:46:in `invoke'
62: from /usr/local/rvm/gems/ruby-2.5.1/gems/railties-5.2.0/lib/rails/command/base.rb:65:in `perform'
61: from /usr/local/rvm/gems/ruby-2.5.1/gems/thor-0.20.0/lib/thor.rb:387:in `dispatch'
60: from /usr/local/rvm/gems/ruby-2.5.1/gems/thor-0.20.0/lib/thor/invocation.rb:126:in `invoke_command'
59: from /usr/local/rvm/gems/ruby-2.5.1/gems/thor-0.20.0/lib/thor/command.rb:27:in `run'
58: from /usr/local/rvm/gems/ruby-2.5.1/gems/railties-5.2.0/lib/rails/commands/server/server_command.rb:142:in `perform'
57: from /usr/local/rvm/gems/ruby-2.5.1/gems/railties-5.2.0/lib/rails/commands/server/server_command.rb:142:in `tap'
56: from /usr/local/rvm/gems/ruby-2.5.1/gems/railties-5.2.0/lib/rails/commands/server/server_command.rb:147:in `block in perform'
55: from /usr/local/rvm/gems/ruby-2.5.1/gems/railties-5.2.0/lib/rails/commands/server/server_command.rb:51:in `start'
54: from /usr/local/rvm/gems/ruby-2.5.1/gems/railties-5.2.0/lib/rails/commands/server/server_command.rb:89:in `log_to_stdout'
53: from /usr/local/rvm/gems/ruby-2.5.1/gems/rack-2.0.5/lib/rack/server.rb:354:in `wrapped_app'
52: from /usr/local/rvm/gems/ruby-2.5.1/gems/railties-5.2.0/lib/rails/commands/server/server_command.rb:27:in `app'
51: from /usr/local/rvm/gems/ruby-2.5.1/gems/rack-2.0.5/lib/rack/server.rb:219:in `app'
50: from /usr/local/rvm/gems/ruby-2.5.1/gems/rack-2.0.5/lib/rack/server.rb:319:in `build_app_and_options_from_config'
49: from /usr/local/rvm/gems/ruby-2.5.1/gems/rack-2.0.5/lib/rack/builder.rb:40:in `parse_file'
48: from /usr/local/rvm/gems/ruby-2.5.1/gems/rack-2.0.5/lib/rack/builder.rb:49:in `new_from_string'
47: from /usr/local/rvm/gems/ruby-2.5.1/gems/rack-2.0.5/lib/rack/builder.rb:49:in `eval'
46: from config.ru:in `<main>'
45: from config.ru:in `new'
44: from /usr/local/rvm/gems/ruby-2.5.1/gems/rack-2.0.5/lib/rack/builder.rb:55:in `initialize'
43: from /usr/local/rvm/gems/ruby-2.5.1/gems/rack-2.0.5/lib/rack/builder.rb:55:in `instance_eval'
42: from config.ru:3:in `block in <main>'
41: from /usr/local/rvm/gems/ruby-2.5.1/gems/bootsnap-1.3.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:44:in `require_relative'
40: from /usr/local/rvm/gems/ruby-2.5.1/gems/activesupport-5.2.0/lib/active_support/dependencies.rb:283:in `require'
39: from /usr/local/rvm/gems/ruby-2.5.1/gems/activesupport-5.2.0/lib/active_support/dependencies.rb:249:in `load_dependency'
38: from /usr/local/rvm/gems/ruby-2.5.1/gems/activesupport-5.2.0/lib/active_support/dependencies.rb:283:in `block in require'
37: from /usr/local/rvm/gems/ruby-2.5.1/gems/bootsnap-1.3.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:29:in `require'
36: from /usr/local/rvm/gems/ruby-2.5.1/gems/bootsnap-1.3.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:20:in `require_with_bootsnap_lfi'
35: from /usr/local/rvm/gems/ruby-2.5.1/gems/bootsnap-1.3.0/lib/bootsnap/load_path_cache/loaded_features_index.rb:65:in `register'
34: from /usr/local/rvm/gems/ruby-2.5.1/gems/bootsnap-1.3.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `block in require_with_bootsnap_lfi'
33: from /usr/local/rvm/gems/ruby-2.5.1/gems/bootsnap-1.3.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `require'
32: from /home/www-upload/treadmilldoctorcurrent/config/environment.rb:5:in `<main>'
31: from /usr/local/rvm/gems/ruby-2.5.1/gems/railties-5.2.0/lib/rails/application.rb:361:in `initialize!'
30: from /usr/local/rvm/gems/ruby-2.5.1/gems/railties-5.2.0/lib/rails/initializable.rb:60:in `run_initializers'
29: from /usr/local/rvm/rubies/ruby-2.5.1/lib/ruby/2.5.0/tsort.rb:205:in `tsort_each'
28: from /usr/local/rvm/rubies/ruby-2.5.1/lib/ruby/2.5.0/tsort.rb:226:in `tsort_each'
27: from /usr/local/rvm/rubies/ruby-2.5.1/lib/ruby/2.5.0/tsort.rb:347:in `each_strongly_connected_component'
26: from /usr/local/rvm/rubies/ruby-2.5.1/lib/ruby/2.5.0/tsort.rb:347:in `call'
25: from /usr/local/rvm/rubies/ruby-2.5.1/lib/ruby/2.5.0/tsort.rb:347:in `each'
24: from /usr/local/rvm/rubies/ruby-2.5.1/lib/ruby/2.5.0/tsort.rb:349:in `block in each_strongly_connected_component'
23: from /usr/local/rvm/rubies/ruby-2.5.1/lib/ruby/2.5.0/tsort.rb:415:in `each_strongly_connected_component_from'
22: from /usr/local/rvm/rubies/ruby-2.5.1/lib/ruby/2.5.0/tsort.rb:415:in `call'
21: from /usr/local/rvm/gems/ruby-2.5.1/gems/railties-5.2.0/lib/rails/initializable.rb:50:in `tsort_each_child'
20: from /usr/local/rvm/gems/ruby-2.5.1/gems/railties-5.2.0/lib/rails/initializable.rb:50:in `each'
19: from /usr/local/rvm/rubies/ruby-2.5.1/lib/ruby/2.5.0/tsort.rb:421:in `block in each_strongly_connected_component_from'
18: from /usr/local/rvm/rubies/ruby-2.5.1/lib/ruby/2.5.0/tsort.rb:431:in `each_strongly_connected_component_from'
17: from /usr/local/rvm/rubies/ruby-2.5.1/lib/ruby/2.5.0/tsort.rb:422:in `block (2 levels) in each_strongly_connected_component_from'
16: from /usr/local/rvm/rubies/ruby-2.5.1/lib/ruby/2.5.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
15: from /usr/local/rvm/rubies/ruby-2.5.1/lib/ruby/2.5.0/tsort.rb:228:in `block in tsort_each'
14: from /usr/local/rvm/gems/ruby-2.5.1/gems/railties-5.2.0/lib/rails/initializable.rb:61:in `block in run_initializers'
13: from /usr/local/rvm/gems/ruby-2.5.1/gems/railties-5.2.0/lib/rails/initializable.rb:32:in `run'
12: from /usr/local/rvm/gems/ruby-2.5.1/gems/railties-5.2.0/lib/rails/initializable.rb:32:in `instance_exec'
11: from /usr/local/rvm/gems/ruby-2.5.1/gems/railties-5.2.0/lib/rails/engine.rb:613:in `block in <class:Engine>'
10: from /usr/local/rvm/gems/ruby-2.5.1/gems/railties-5.2.0/lib/rails/engine.rb:613:in `each'
9: from /usr/local/rvm/gems/ruby-2.5.1/gems/railties-5.2.0/lib/rails/engine.rb:614:in `block (2 levels) in <class:Engine>'
8: from /usr/local/rvm/gems/ruby-2.5.1/gems/railties-5.2.0/lib/rails/engine.rb:656:in `load_config_initializer'
7: from /usr/local/rvm/gems/ruby-2.5.1/gems/activesupport-5.2.0/lib/active_support/notifications.rb:170:in `instrument'
6: from /usr/local/rvm/gems/ruby-2.5.1/gems/railties-5.2.0/lib/rails/engine.rb:657:in `block in load_config_initializer'
5: from /usr/local/rvm/gems/ruby-2.5.1/gems/activesupport-5.2.0/lib/active_support/dependencies.rb:277:in `load'
4: from /usr/local/rvm/gems/ruby-2.5.1/gems/activesupport-5.2.0/lib/active_support/dependencies.rb:249:in `load_dependency'
3: from /usr/local/rvm/gems/ruby-2.5.1/gems/activesupport-5.2.0/lib/active_support/dependencies.rb:277:in `block in load'
2: from /usr/local/rvm/gems/ruby-2.5.1/gems/bootsnap-1.3.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:50:in `load'
1: from /usr/local/rvm/gems/ruby-2.5.1/gems/bootsnap-1.3.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:50:in `load'
/home/www-upload/treadmilldoctorcurrent/config/initializers/new_framework_defaults.rb:21:in `<main>': undefined method `halt_callback_chains_on_return_false=' for
ActiveSupport:Module (NoMethodError)
提前致谢。
我在上次从5.1升级到5.2时遇到了同样的问题。我所做的只是在config/initializers/new_framework_defaults.rb中注释掉这一行
# Do not halt callback chains when a callback returns false. Previous versions had true.
# ActiveSupport.halt_callback_chains_on_return_false = false
我想它引发这个错误的原因是因为halt_callback_chains_on_return_false选项实际上是根据this release note从ActiveSupport中删除的。
这是以前的行为：
WelcomeController < ApplicationController
before_action: -> { return false }
def index
# would not be called
end
end
halt_callback_chains_on_return_false = false做了什么：
WelcomeController < ApplicationController
before_action: -> { return false }
def index
# would now be rendered regardless of the before_action filter chain's return value
end
end
Rails认为你应该在过滤器链中做什么来防止渲染：
WelcomeController < ApplicationController
before_action: -> { raise 'Error' }
def index
# would not be rendered
end
end
希望这可以帮助。
最好，埃米尔
halt_callback_chains_on_return_false setting in the initializer
这是在升级到Rails 5.0之后临时保留旧回调行为的解决方案。假设您需要时间检查应用程序中的所有回调，之后您可以删除此设置。并且假设在升级到5.2时已经检查了所有内容，因此删除了此设置。
只需在config / initializers / new_framework_defaults.rb文件中注释掉@worrawut建议的行。