Ruby 从 1.9.3-p194 升级/降级到 1.9.3-p286答案

【问题标题】：Ruby upgrade / downgrade from 1.9.3-p194 to 1.9.3-p286Ruby 从 1.9.3-p194 升级/降级到 1.9.3-p286
【发布时间】：2012-10-23 14:27:49
【问题描述】：

我刚刚通过 rvm upgrade 命令和 gemset 从 ruby 1.9.3-p194 升级到 1.9.3-p286。现在，当我在我的 rails 应用程序上运行 rake rails upgrade 时，它会给我以下跟踪：

nosh@nosh-VirtualBox:~/Projects/icon$ rake rails update --trace
rake aborted!
cannot load such file -- ruby_debug.so
/home/nosh/.rvm/gems/ruby-1.9.3-p286/gems/ruby-debug-base19-0.11.26/lib/ruby-debug-base.rb:1:in `require'
/home/nosh/.rvm/gems/ruby-1.9.3-p286/gems/ruby-debug-base19-0.11.26/lib/ruby-debug-base.rb:1:in `<top (required)>'
/home/nosh/.rvm/gems/ruby-1.9.3-p286/gems/ruby-debug19-0.11.6/cli/ruby-debug.rb:5:in `require'
/home/nosh/.rvm/gems/ruby-1.9.3-p286/gems/ruby-debug19-0.11.6/cli/ruby-debug.rb:5:in `<top (required)>'
/home/nosh/.rvm/gems/ruby-1.9.3-p286/gems/bundler-1.2.1/lib/bundler/runtime.rb:68:in `require'
/home/nosh/.rvm/gems/ruby-1.9.3-p286/gems/bundler-1.2.1/lib/bundler/runtime.rb:68:in `block (2 levels) in require'
/home/nosh/.rvm/gems/ruby-1.9.3-p286/gems/bundler-1.2.1/lib/bundler/runtime.rb:66:in `each'
/home/nosh/.rvm/gems/ruby-1.9.3-p286/gems/bundler-1.2.1/lib/bundler/runtime.rb:66:in `block in require'
/home/nosh/.rvm/gems/ruby-1.9.3-p286/gems/bundler-1.2.1/lib/bundler/runtime.rb:55:in `each'
/home/nosh/.rvm/gems/ruby-1.9.3-p286/gems/bundler-1.2.1/lib/bundler/runtime.rb:55:in `require'
/home/nosh/.rvm/gems/ruby-1.9.3-p286/gems/bundler-1.2.1/lib/bundler.rb:128:in `require'
/home/nosh/Projects/icon/config/application.rb:7:in `<top (required)>'
/home/nosh/Projects/icon/Rakefile:5:in `require'
/home/nosh/Projects/icon/Rakefile:5:in `<top (required)>'
/home/nosh/.rvm/gems/ruby-1.9.3-p286@global/gems/rake-0.9.2.2/lib/rake/rake_module.rb:25:in `load'
/home/nosh/.rvm/gems/ruby-1.9.3-p286@global/gems/rake-0.9.2.2/lib/rake/rake_module.rb:25:in `load_rakefile'
/home/nosh/.rvm/gems/ruby-1.9.3-p286@global/gems/rake-0.9.2.2/lib/rake/application.rb:501:in `raw_load_rakefile'
/home/nosh/.rvm/gems/ruby-1.9.3-p286@global/gems/rake-0.9.2.2/lib/rake/application.rb:82:in `block in load_rakefile'
/home/nosh/.rvm/gems/ruby-1.9.3-p286@global/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/home/nosh/.rvm/gems/ruby-1.9.3-p286@global/gems/rake-0.9.2.2/lib/rake/application.rb:81:in `load_rakefile'
/home/nosh/.rvm/gems/ruby-1.9.3-p286@global/gems/rake-0.9.2.2/lib/rake/application.rb:65:in `block in run'
/home/nosh/.rvm/gems/ruby-1.9.3-p286@global/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/home/nosh/.rvm/gems/ruby-1.9.3-p286@global/gems/rake-0.9.2.2/lib/rake/application.rb:63:in `run'
/home/nosh/.rvm/gems/ruby-1.9.3-p286@global/gems/rake-0.9.2.2/bin/rake:33:in `<top (required)>'
/home/nosh/.rvm/gems/ruby-1.9.3-p286@global/bin/rake:19:in `load'
/home/nosh/.rvm/gems/ruby-1.9.3-p286@global/bin/rake:19:in `<main>'
/home/nosh/.rvm/gems/ruby-1.9.3-p286/bin/ruby_noexec_wrapper:14:in `eval'
/home/nosh/.rvm/gems/ruby-1.9.3-p286/bin/ruby_noexec_wrapper:14:in `<main>'

感谢任何建议。如果它的 ruby 版本与 ruby debug 19 gem 冲突。那我应该如何降级回1.9.3-p194。

【问题讨论】：

如果您通过 rvm 安装，您应该能够切换回该补丁级别 rvm use ruby-1.9.3-p194。也不是一个真正的答案，但你总是可以尝试用 pry 进行调试 :)。

标签： ruby-on-rails ruby ruby-upgrade

【解决方案1】：

我想我只需要尝试一下；但允许升级的相同 rvm 命令也允许降级。所以下面的命令允许我降级到以前的版本：

rvm upgrade 1.9.3-p286 1.9.3-p194

它也迁移了宝石。顺便说一句，我在降级后还发现我使用的 rake rails update 命令语法不正确。所以这是不正确的：

rake rails update --trace (incorrect)

这是正确的：

rake rails:update --trace (correct)

再次升级后我没有收到错误，这意味着我可能使用了错误的语法。

【讨论】：