我在我的 Ubuntu 主目录中，试图用 rails new 创建一个新的 rails 应用程序，但是我得到了这个错误:

The i18n gem is not available. Please add it to your Gemfile and run bundle install

我运行的任何 rails 命令都会出现该错误。我真的很困惑，因为我不在应用程序中。我只是在我的主目录中。没有 gem 文件。我尝试使用 gem install 'i18n' 将“i18n”安装到我的主目录中，它成功了，但我仍然收到该错误。

我以前从未遇到过在我的主目录中使用 rails 命令的任何问题。当我 cd 进入我的个人应用程序时，所有与 rails 相关的东西都能正常工作。怎么回事？

此外，我现在在所有现有的 Rails 应用程序中遇到了同样的错误。 rails 突然变得依赖于那个 gem 了吗？或者删除我的主目录中的 gem 是否会导致它在我的应用程序中不可用？

更新

我尝试了 gem cleanup rails 并重新安装，但没有任何改变。结果如下:

$ gem cleanup rails
  Cleaning up installed gems...
  Attempting to uninstall rails-4.0.10
  Successfully uninstalled rails-4.0.10
  Attempting to uninstall rails-4.2.1
  Successfully uninstalled rails-4.2.1
  Attempting to uninstall rails-4.2.4
  Successfully uninstalled rails-4.2.4
  Attempting to uninstall rails-5.0.1
  Successfully uninstalled rails-5.0.1
  Attempting to uninstall rails-5.0.2
  Successfully uninstalled rails-5.0.2
  Attempting to uninstall rails-5.0.3
  Successfully uninstalled rails-5.0.3
  Attempting to uninstall rails-5.0.4
  Successfully uninstalled rails-5.0.4
  Clean Up Complete
$ gem install rails -v 5.0.1
  Fetching: rails-5.0.1.gem (100%)
  Successfully installed rails-5.0.1
  Parsing documentation for rails-5.0.1
  Installing ri documentation for rails-5.0.1
  Done installing documentation for rails after 1 seconds
  1 gem installed
$ rails -v
  The i18n gem is not available. Please add it to your Gemfile and run bundle install

更新 2

我以前手动安装过 i18n，我认为这可能是问题所在，所以我卸载了 rails 和 i18n 并重新安装了 rails 。但我仍然收到错误:

  $ gem uninstall rails --all

You have requested to uninstall the gem:
    rails-5.0.1

browser-2.3.0 depends on rails (>= 0, development)
browser-1.1.0 depends on rails (>= 0, development)
browser-0.9.1 depends on rails (>= 0, development)
carrierwave-1.2.1 depends on rails (>= 4.0.0, development)
carrierwave-1.0.0 depends on rails (>= 4.0.0, development)
rails_serve_static_assets-0.0.5 depends on rails (>= 3.1, development)
rails_serve_static_assets-0.0.4 depends on rails (>= 3.1, development)
sass-rails-4.0.5 depends on rails (>= 0, development)
sunspot_rails-2.2.7 depends on rails (>= 3)
twitter-typeahead-rails-0.10.5 depends on rails (>= 3.1, development)
yaml_db_improved-1.0.1 depends on rails (>= 0)
If you remove this gem, these dependencies will not be met.
Continue with Uninstall? [yN]  y
Successfully uninstalled rails-5.0.1

  $ gem uninstall i18n --all

You have requested to uninstall the gem:
    i18n-0.9.1

activesupport-5.1.4 depends on i18n (~> 0.7)
activesupport-5.0.5 depends on i18n (~> 0.7)
activesupport-5.0.4 depends on i18n (~> 0.7)
activesupport-5.0.3 depends on i18n (~> 0.7)
activesupport-5.0.2 depends on i18n (~> 0.7)
activesupport-5.0.1 depends on i18n (~> 0.7)
activesupport-4.2.4 depends on i18n (~> 0.7)
activesupport-4.2.1 depends on i18n (~> 0.7)
activesupport-4.0.10 depends on i18n (>= 0.6.9, ~> 0.6)
capistrano-3.8.0 depends on i18n (>= 0)
capistrano-3.7.2 depends on i18n (>= 0)
If you remove this gem, these dependencies will not be met.
Continue with Uninstall? [yN]  y
Successfully uninstalled i18n-0.9.1

  $ gem install rails --version 5.0.1

Fetching: i18n-0.9.1.gem (100%)
Successfully installed i18n-0.9.1
Fetching: rails-5.0.1.gem (100%)
Successfully installed rails-5.0.1
Parsing documentation for i18n-0.9.1
Installing ri documentation for i18n-0.9.1
Parsing documentation for rails-5.0.1
Installing ri documentation for rails-5.0.1
Done installing documentation for i18n, rails after 4 seconds
2 gems installed

  $ rails -v

The i18n gem is not available. Please add it to your Gemfile and run bundle install
/home/user/.rvm/rubies/ruby-2.3.3/lib/ruby/site_ruby/2.3.0/rubygems/specification.rb:2278:in `check_version_conflict': can't activate activesupport-5.1.4, alrea
...

最佳答案

再次尝试 gem install rails。或者 gem install rails -v 5.0 安装特定版本。

看来您不知何故没有 rails 并且它的依赖项已完全安装。可能是因为您重新安装了 ruby​​ 或安装了不同的 ruby​​ 版本。如果我是对的，那就是正在发生的事情，只需重新安装最新版本的 rails 或您想要的版本，所需的一切都会再次出现。

关于ruby-on-rails - 主目录中的 Rails 命令导致 "i18n gem is not available"错误，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/48255314/