ruby-on-rails - 尝试启动新的 Rails 应用程序时无法加载此类文件

Question

我正在尝试启动一个新的 Rails 应用程序，但出于某种原因，我的计算机不再识别 Rails...它在我之前一直在使用的所有其他 Rails 应用程序上都运行良好。

当我打字时；

rails new test_app -d postgresql -T

它抛出了这个错误:

/home/camillavk/.rvm/gems/ruby-2.1.5/bin/rails:23:in `load': cannot load such file -- /home/camillavk/.rvm/gems/ruby-2.1.5/gems/rails-4.2.0/bin/rails (LoadError)
        from /home/camillavk/.rvm/gems/ruby-2.1.5/bin/rails:23:in `<main>'
        from /home/camillavk/.rvm/gems/ruby-2.1.5/bin/ruby_executable_hooks:15:in `eval'
        from /home/camillavk/.rvm/gems/ruby-2.1.5/bin/ruby_executable_hooks:15:in `<main>'

当我输入 rails -v 时出现同样的错误.但是当我输入 which rails我明白了

/home/camillavk/.rvm/gems/ruby-2.1.5/bin/rails

然后我尝试运行 gem install rails它只说 1 gem installed

关于为什么 Rails 在我的计算机上执行此操作以及如何修复它有什么想法吗？

*编辑

gem 环境:

RubyGems Environment:
  - RUBYGEMS VERSION: 2.4.5
  - RUBY VERSION: 2.1.5 (2014-11-13 patchlevel 273) [x86_64-linux]
  - INSTALLATION DIRECTORY: /home/camillavk/.rvm/gems/ruby-2.1.5
  - RUBY EXECUTABLE: /home/camillavk/.rvm/rubies/ruby-2.1.5/bin/ruby
  - EXECUTABLE DIRECTORY: /home/camillavk/.rvm/gems/ruby-2.1.5/bin
  - SPEC CACHE DIRECTORY: /home/camillavk/.gem/specs
  - SYSTEM CONFIGURATION DIRECTORY: /home/camillavk/.rvm/rubies/ruby-2.1.5/etc
  - RUBYGEMS PLATFORMS:
    - ruby
    - x86_64-linux
  - GEM PATHS:
     - /home/camillavk/.rvm/gems/ruby-2.1.5
     - /home/camillavk/.rvm/gems/ruby-2.1.5@global
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :backtrace => false
     - :bulk_threshold => 1000
     - "gem" => "--no-rdoc --no-ri"
  - REMOTE SOURCES:
     - https://rubygems.org/
  - SHELL PATH:
     - /home/camillavk/.rvm/gems/ruby-2.1.5/bin
     - /home/camillavk/.rvm/gems/ruby-2.1.5@global/bin
     - /home/camillavk/.rvm/rubies/ruby-2.1.5/bin
     - /usr/local/sbin
     - /usr/local/bin
     - /usr/sbin
     - /usr/bin
     - /sbin
     - /bin
     - /usr/games
     - /usr/local/games
     - /home/camillavk/bin
     - /usr/local/java/jdk1.8.0_25/bin
     - /home/camillavk/.rvm/bin
     - /usr/local/sbin
     - /usr/local/bin
     - /usr/sbin
     - /usr/bin
     - /sbin
     - /bin
     - /usr/games
     - /usr/local/games
     - /home/camillavk/.rvm/bin

Answer 1

以防其他人遇到这个问题，我认为 rvm 只是变得困惑所以我告诉它使用旧版本的 ruby​​

$ rvm use 1.9.3

然后我再次运行 rails new。这次成功了，所以我换成了新的应用程序，打开了 gemfile 并在其中告诉它再次使用更新版本的 ruby​​。