ruby-on-rails - 升级到 ruby​​ 2.3.0 NameError: uninitialized constant I18n::Config::Backend

Question

我刚刚将 Ruby 2.2.2 升级到 2.3.0。每当我运行 rake 任务时，我都会收到以下错误:

Christians-Air:my_rails_app cman77$ rake --trace
rake aborted!
NameError: uninitialized constant I18n::Config::Backend
/Users/cman77/.rvm/gems/ruby-2.3.0@jbio.3.0/gems/i18n-0.7.0/lib/i18n/config.rb:19:in `backend'
/Users/cman77/.rvm/gems/ruby-2.3.0@jbio.3.0/gems/i18n-0.7.0/lib/i18n.rb:147:in `translate'
/Users/cman77/.rvm/gems/ruby-2.3.0@jbio.3.0/gems/actionview-4.2.6/lib/action_view/helpers/translation_helper.rb:69:in `translate'
/Users/cman77/.rvm/gems/ruby-2.3.0@jbio.3.0/gems/i18n-0.7.0/lib/i18n/config.rb:19:in `backend'
/Users/cman77/.rvm/gems/ruby-2.3.0@jbio.3.0/gems/i18n-0.7.0/lib/i18n.rb:147:in `translate'
/Users/cman77/.rvm/gems/ruby-2.3.0@jbio.3.0/gems/actionview-4.2.6/lib/action_view/helpers/translation_helper.rb:69:in `translate'
/Users/cman77/.rvm/gems/ruby-2.3.0@jbio.3.0/gems/railties-4.2.6/lib/rails/engine.rb:658:in `block in run_tasks_blocks'
/Users/cman77/.rvm/gems/ruby-2.3.0@jbio.3.0/gems/railties-4.2.6/lib/rails/engine.rb:658:in `each'
/Users/cman77/.rvm/gems/ruby-2.3.0@jbio.3.0/gems/railties-4.2.6/lib/rails/engine.rb:658:in `run_tasks_blocks'
/Users/cman77/.rvm/gems/ruby-2.3.0@jbio.3.0/gems/railties-4.2.6/lib/rails/application.rb:452:in `run_tasks_blocks'
/Users/cman77/.rvm/gems/ruby-2.3.0@jbio.3.0/gems/railties-4.2.6/lib/rails/engine.rb:453:in `load_tasks'
/Users/cman77/.rvm/gems/ruby-2.3.0@jbio.3.0/gems/railties-4.2.6/lib/rails/railtie.rb:194:in `public_send'
/Users/cman77/.rvm/gems/ruby-2.3.0@jbio.3.0/gems/railties-4.2.6/lib/rails/railtie.rb:194:in `method_missing'
/Users/cman77/Dropbox/rails_projects/my_rails_app/Rakefile:9:in `<top (required)>'
/Users/cman77/.rvm/gems/ruby-2.3.0@jbio.3.0/gems/rake-11.1.2/lib/rake/rake_module.rb:28:in `load'
/Users/cman77/.rvm/gems/ruby-2.3.0@jbio.3.0/gems/rake-11.1.2/lib/rake/rake_module.rb:28:in `load_rakefile'
/Users/cman77/.rvm/gems/ruby-2.3.0@jbio.3.0/gems/rake-11.1.2/lib/rake/application.rb:689:in `raw_load_rakefile'
/Users/cman77/.rvm/gems/ruby-2.3.0@jbio.3.0/gems/rake-11.1.2/lib/rake/application.rb:94:in `block in load_rakefile'
/Users/cman77/.rvm/gems/ruby-2.3.0@jbio.3.0/gems/rake-11.1.2/lib/rake/application.rb:176:in `standard_exception_handling'
/Users/cman77/.rvm/gems/ruby-2.3.0@jbio.3.0/gems/rake-11.1.2/lib/rake/application.rb:93:in `load_rakefile'
/Users/cman77/.rvm/gems/ruby-2.3.0@jbio.3.0/gems/rake-11.1.2/lib/rake/application.rb:77:in `block in run'
/Users/cman77/.rvm/gems/ruby-2.3.0@jbio.3.0/gems/rake-11.1.2/lib/rake/application.rb:176:in `standard_exception_handling'
/Users/cman77/.rvm/gems/ruby-2.3.0@jbio.3.0/gems/rake-11.1.2/lib/rake/application.rb:75:in `run'
/Users/cman77/.rvm/gems/ruby-2.3.0@jbio.3.0/gems/rake-11.1.2/bin/rake:33:in `<top (required)>'
/Users/cman77/.rvm/gems/ruby-2.3.0@jbio.3.0/bin/rake:23:in `load'
/Users/cman77/.rvm/gems/ruby-2.3.0@jbio.3.0/bin/rake:23:in `<main>'
/Users/cman77/.rvm/gems/ruby-2.3.0@jbio.3.0/bin/ruby_executable_hooks:15:in `eval'
/Users/cman77/.rvm/gems/ruby-2.3.0@jbio.3.0/bin/ruby_executable_hooks:15:in `<main>'

谁有这方面的经验？我真的不知道如何开始诊断/解决这个问题。

这是我的 Rakefile 的内容:

#!/usr/bin/env rake
# Add your own tasks in files placed in lib/tasks ending in .rake,
# for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.

require File.expand_path('../config/application', __FILE__)

ENV['NEWRELIC_ENABLE'] = 'false'

MyRailsApp::Application.load_tasks

这似乎是 I18n gem 中引用的违规行: https://github.com/svenfuchs/i18n/blob/master/lib/i18n/config.rb#L18

更新:它似乎与在我的一个 rake 文件中使用 include ActionView::Helpers::TranslationHelper 有关。如果删除该行，我就可以运行 rake 命令。

更新 2:删除 include ActionView::Helpers::TranslationHelper 并将 (t "some_text") 替换为 (I18n. t "some_text") 完全解决了这个问题。我仍然会把赏金奖励给任何能解释为什么 Ruby 升级失败的人!

Answer 1

我猜你遇到这个问题是因为你在 rake 任务中使用了 t 方法( Controller 和 View 的助手)，而不是标准的 I18n.t.

这是一种不常见且非常规的方法，因此您可能陷入了倒退 few have experienced它有一个简单的解决方案，就像您发现的那样:坚持约定。