【问题标题】：Uninstall Rails completely完全卸载 Rails
【发布时间】：2013-04-23 08:38:47
【问题描述】：

我正在尝试完全卸载 Rails，但我无法掌握它。

这是我尝试过的：

$ gem update
rails 4.0.0.beta1 installed

$ rails -v
Rails 4.0.0.beta1

$ gem uninstall rails -v 4.0.0.beta1

但仍然：

$ rails -v
Rails 4.0.0.beta1

我怎样才能完全删除 rails 版本？

【问题讨论】：

gem uninstall rails -v 4.0.0.beta1 的输出是什么？
你解决了这个问题吗？我遇到了和你一样的问题。
好吧，我终于解决了这个问题，看我的cmets如下

标签： ruby-on-rails

【解决方案1】：

最终解决方案

只需卸载 railties -v 4.0.0，一切正常。

$ which rails
~/software/bin/rails
$ rails -v
Rails 4.0.0
$ gem list | grep rails
rails (4.0.0, 3.2.13, 3.2.9, 3.2.6)
$ gem uninstall rails -v 4.0.0

You have requested to uninstall the gem:
        rails-4.0.0
figaro-0.7.0 depends on [rails (< 5, >= 3)]
.....
.....
Continue with Uninstall? [Yn]  y
Successfully uninstalled rails-4.0.0
$ gem list | grep rails
rails (3.2.13, 3.2.9, 3.2.6)
$ rails  -v
Rails 4.0.0
$ gem uninstall railties -v 4.0.0

You have requested to uninstall the gem:
        railties-4.0.0
coffee-rails-4.0.0 depends on [railties (< 5.0, >= 4.0.0.beta)]
....
....
If you remove this gems, one or more dependencies will not be met.
Continue with Uninstall? [Yn]  y
Successfully uninstalled railties-4.0.0
$ rails -v
Rails 3.2.13

看！ rails版本恢复正常！！

这里的原因：

$ tail `which rails`
  str = ARGV.first
  str = str.dup.force_encoding("BINARY") if str.respond_to? :force_encoding
  if str =~ /\A_(.*)_\z/
    version = $1
    ARGV.shift
  end
end

gem 'railties', version
load Gem.bin_path('railties', 'rails', version)

早点尝试

嗯，我做了所有我在互联网上找到的东西，但没有任何效果。我只是删除 gem 文件夹，安装 rails 3.2.12，它就可以工作了...
已安装所有 31 个 gem

# rm -rf /usr/local/lib/ruby/gems/
# gem list

*** LOCAL GEMS ***
# gem cleanup
Cleaning up installed gems...
Clean Up Complete
# gem update --system
# gem install rails -v 3.2.12
Fetching: i18n-0.6.5.gem (100%)
Successfully installed i18n-0.6.5
Fetching: multi_json-1.8.2.gem (100%)
Successfully installed multi_json-1.8.2
Fetching: activesupport-3.2.12.gem (100%)
Successfully installed activesupport-3.2.12
Fetching: builder-3.0.4.gem (100%)
Successfully installed builder-3.0.4
Fetching: activemodel-3.2.12.gem (100%)
Successfully installed activemodel-3.2.12
Fetching: rack-1.4.5.gem (100%)
Successfully installed rack-1.4.5
Fetching: rack-cache-1.2.gem (100%)
Successfully installed rack-cache-1.2
Fetching: rack-test-0.6.2.gem (100%)
Successfully installed rack-test-0.6.2
Fetching: journey-1.0.4.gem (100%)
Successfully installed journey-1.0.4
Fetching: hike-1.2.3.gem (100%)
Successfully installed hike-1.2.3
Fetching: tilt-1.4.1.gem (100%)
Successfully installed tilt-1.4.1
Fetching: sprockets-2.2.2.gem (100%)
Successfully installed sprockets-2.2.2
Fetching: erubis-2.7.0.gem (100%)
Successfully installed erubis-2.7.0
Fetching: actionpack-3.2.12.gem (100%)
Successfully installed actionpack-3.2.12
Fetching: arel-3.0.2.gem (100%)
Successfully installed arel-3.0.2
Fetching: tzinfo-0.3.38.gem (100%)
Successfully installed tzinfo-0.3.38
Fetching: activerecord-3.2.12.gem (100%)
Successfully installed activerecord-3.2.12
Fetching: activeresource-3.2.12.gem (100%)
Successfully installed activeresource-3.2.12
Fetching: mime-types-1.25.gem (100%)
Successfully installed mime-types-1.25
Fetching: polyglot-0.3.3.gem (100%)
Successfully installed polyglot-0.3.3
Fetching: treetop-1.4.15.gem (100%)
Successfully installed treetop-1.4.15
Fetching: mail-2.4.4.gem (100%)
Successfully installed mail-2.4.4
Fetching: actionmailer-3.2.12.gem (100%)
Successfully installed actionmailer-3.2.12
Fetching: rake-10.1.0.gem (100%)
Successfully installed rake-10.1.0
Fetching: rack-ssl-1.3.3.gem (100%)
Successfully installed rack-ssl-1.3.3
Fetching: thor-0.18.1.gem (100%)
Successfully installed thor-0.18.1
Fetching: json-1.8.0.gem (100%)
Building native extensions.  This could take a while...
Successfully installed json-1.8.0
Fetching: rdoc-3.12.2.gem (100%)
Depending on your version of ruby, you may need to install ruby rdoc/ri data:

<= 1.8.6 : unsupported
 = 1.8.7 : gem install rdoc-data; rdoc-data --install
 = 1.9.1 : gem install rdoc-data; rdoc-data --install
>= 1.9.2 : nothing to do! Yay!
Successfully installed rdoc-3.12.2
Fetching: railties-3.2.12.gem (100%)
Successfully installed railties-3.2.12
Fetching: bundler-1.3.5.gem (100%)
Successfully installed bundler-1.3.5
Fetching: rails-3.2.12.gem (100%)
Successfully installed rails-3.2.12
... rdoc stuff  ...
31 gems installed

这里有些奇怪

我有$ sudo gem uninstall rails -v 4.0.0 和$ sudo gem cleanup 并安装rails 3.2.13 ($ sudo gem install rails -v 3.2.13)，只安装了15 个宝石：

$ sudo gem install rails -v 3.2.13
Fetching: i18n-0.6.1.gem (100%)
Fetching: activesupport-3.2.13.gem (100%)
Fetching: builder-3.0.4.gem (100%)
Fetching: activemodel-3.2.13.gem (100%)
Fetching: rack-1.4.5.gem (100%)
Fetching: sprockets-2.2.2.gem (100%)
Fetching: actionpack-3.2.13.gem (100%)
Fetching: arel-3.0.2.gem (100%)
Fetching: tzinfo-0.3.38.gem (100%)
Fetching: activerecord-3.2.13.gem (100%)
Fetching: activeresource-3.2.13.gem (100%)
Fetching: actionmailer-3.2.13.gem (100%)
Fetching: rdoc-3.12.2.gem (100%)
Depending on your version of ruby, you may need to install ruby rdoc/ri data:

<= 1.8.6 : unsupported
 = 1.8.7 : gem install rdoc-data; rdoc-data --install
 = 1.9.1 : gem install rdoc-data; rdoc-data --install
>= 1.9.2 : nothing to do! Yay!
Fetching: railties-3.2.13.gem (100%)
Successfully installed i18n-0.6.1
Successfully installed activesupport-3.2.13
Successfully installed builder-3.0.4
Successfully installed activemodel-3.2.13
Successfully installed rack-1.4.5
Successfully installed sprockets-2.2.2
Successfully installed actionpack-3.2.13
Successfully installed arel-3.0.2
Successfully installed tzinfo-0.3.38
Successfully installed activerecord-3.2.13
Successfully installed activeresource-3.2.13
Successfully installed actionmailer-3.2.13
Successfully installed rdoc-3.12.2
Successfully installed railties-3.2.13
Successfully installed rails-3.2.13
15 gems installed
... rdoc stuff ...

还有rails -v:

$ rails -v
/usr/local/lib/ruby/1.9.1/rubygems/dependency.rb:247:in `to_specs': Could not find minitest (~> 4.2) amongst [actionmailer-4.0.0, actionmailer-3.2.13, actionpack-4.0.0, actionpack-3.2.13, activemodel-4.0.0, activemodel-3.2.13, activerecord-4.0.0, activerecord-3.2.13, activerecord-deprecated_finders-1.0.3, activeresource-4.0.0, activeresource-3.2.13, activesupport-4.0.0, activesupport-3.2.13, addressable-2.3.3, arel-4.0.0, arel-3.0.2, atomic-1.1.14, bcrypt-ruby-3.0.1, better_errors-0.8.0, bigdecimal-1.2.1, binding_of_caller-0.7.1, bootstrap-sass-2.3.1.0, builder-3.2.2, builder-3.0.4, bundler-1.3.5, cancan-1.6.9, capybara-2.0.3, childprocess-0.3.9, coderay-1.0.9, coffee-rails-4.0.0, coffee-script-2.2.0, coffee-script-source-1.6.3, countries-0.9.2, cucumber-1.2.3, cucumber-rails-1.3.1, currencies-0.4.0, database_cleaner-1.0.0.RC1, debug_inspector-0.0.2, devise-2.2.3, diff-lcs-1.2.2, email_spec-1.4.0, erubis-2.7.0, execjs-2.0.2, factory_girl-4.2.0, factory_girl_rails-4.2.1, ffi-1.6.0, figaro-0.6.3, gherkin-2.11.6, hike-1.2.3, httpclient-2.3.3, httpi-2.0.2, i18n-0.6.5, i18n-0.6.1, io-console-0.4.2, jbuilder-1.5.1, journey-1.0.4, jquery-rails-3.0.4, json-1.8.0, launchy-2.2.0, libv8-3.16.14.3, mail-2.5.4, mime-types-1.25, minitest-5.0.8, multi_json-1.8.1, mysql2-0.3.13, nokogiri-1.5.9, orm_adapter-0.4.0, polyglot-0.3.3, quiet_assets-1.0.2, rack-1.5.2, rack-1.4.5, rack-cache-1.2, rack-ssl-1.3.3, rack-test-0.6.2, rails-3.2.13, rails-observers-0.1.2, railties-4.0.0, railties-3.2.13, rake-10.1.0, rdoc-4.0.1, rdoc-3.12.2, recurly-2.1.8, ref-1.0.5, rolify-3.2.0, rspec-core-2.13.1, rspec-expectations-2.13.0, rspec-mocks-2.13.0, rspec-rails-2.13.0, rubyzip-0.9.9, sass-3.2.12, sass-rails-4.0.0, sdoc-0.3.20, selenium-webdriver-2.31.0, simple_form-2.1.0, sprockets-2.10.0, sprockets-2.2.2, sprockets-rails-2.0.0, therubyracer-0.12.0, thor-0.18.1, thread_safe-0.1.3, tilt-1.4.1, treetop-1.4.15, turbolinks-1.3.0, tzinfo-1.1.0, tzinfo-0.3.38, uglifier-2.2.1, warden-1.2.1, websocket-1.0.7, xpath-1.0.0] (Gem::LoadError)
    from /usr/local/lib/ruby/1.9.1/rubygems/specification.rb:777:in `block in activate_dependencies'
    from /usr/local/lib/ruby/1.9.1/rubygems/specification.rb:766:in `each'
    from /usr/local/lib/ruby/1.9.1/rubygems/specification.rb:766:in `activate_dependencies'
    from /usr/local/lib/ruby/1.9.1/rubygems/specification.rb:750:in `activate'
    from /usr/local/lib/ruby/1.9.1/rubygems/specification.rb:780:in `block in activate_dependencies'
    from /usr/local/lib/ruby/1.9.1/rubygems/specification.rb:766:in `each'
    from /usr/local/lib/ruby/1.9.1/rubygems/specification.rb:766:in `activate_dependencies'
    from /usr/local/lib/ruby/1.9.1/rubygems/specification.rb:750:in `activate'
    from /usr/local/lib/ruby/1.9.1/rubygems.rb:1232:in `gem'
    from /usr/local/bin/rails:22:in `<main>'

无法通过完全卸载来删除 Rails 4.0.0，这是一个错误吗？

【讨论】：

什么是有线的？我认为有一个错字。
谢谢，这解决了我的问题！应该是公认的解决方案。
谢谢，还帮我卸载了 Rails，用于降级 :)

【解决方案2】：

从系统中完全移除导轨的 2 个步骤

1) gem uninstall rails
2）gem uninstall railties

选择您要卸载的版本。

【讨论】：

【解决方案3】：

万一其他人来了，我发现我也必须卸载railties。

gem uninstall railties

从/~user 向下检查您可能安装过 rails 的所有目录

【讨论】：

【解决方案4】：

如果您使用的是 rvm，您可以通过删除 $HOME 中的 .gem 目录来卸载所有 gems

rm -rf ~/.gem

或仅卸载 rails：

gem 卸载 -a rails

或者如果您使用 sudo 安装：

sudo gem 卸载 -a rails

【讨论】：

【解决方案5】：

您尚未指定要卸载的 gem，请尝试 gem uninstall rails。

【讨论】：

我写道：gem uninstall rails -v 4.0.0.beta1 ( gem uninstall rails -v=4.0.0.beta1)

【解决方案6】：

sudo gem uninstall rails -v 4.0.0.beta1

应该有帮助。

【讨论】：

我写道：gem uninstall rails -v 4.0.0.beta1 ( gem uninstall rails -v=4.0.0.beta1)

【解决方案7】：

首先你应该了解rails的位置。输入您的控制台（bash、zsh 等）

which rails

如果它位于您的主文件夹中，例如：

/home/your_name/.rvm/gems/ruby-1.9.3-p392/bin/rails

然后，您应该使用本地 gem 将其删除：

gem uninstall rails

否则，你可能不得不使用sudo：

sudo gem uninstall rails

注意：您可以按以下方式检查您的 Rails 版本：

本地：

gem list rails

全球：

sudo gem list rails

【讨论】：

【解决方案8】：

我还必须卸载 Railties，一切正常。

【讨论】：

【解决方案9】：

您只需尝试此命令。它将有助于卸载所有导轨 “宝石卸载 railties” 我认为这是完全卸载所有 rails 的唯一方法

【讨论】：