我正在尝试完全卸载Rails ，但我无法掌握它。
这是我试过的：
$ 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
如何完全删除rails版本？
答案 0 :(得分：49)
只需卸载 railties -v 4.0.0 ，一切就好了。
$ 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
请参阅！导轨版正常!!
$ 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)
好吧，我做了我在互联网上找到的所有东西，但没有什么工作正常。我只是删除了gem文件夹，安装rails 3.2.12，它可以工作......
已安装 31个宝石
# 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
我$ 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 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 ...
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>'
Rails 4.0.0无法通过卸载完全删除，这是一个错误吗？
答案 1 :(得分：23)
从系统中完全删除导轨的两个步骤
1）gem uninstall rails
2）gem uninstall railties
选择要卸载的版本。
答案 2 :(得分：9)
万一有人来到这里，我发现我也必须卸载railties。
gem uninstall railties
从/~user向下
答案 3 :(得分：1)
如果您使用的是rvm，可以通过删除$ HOME中的.gem目录来卸载所有宝石
rm -rf~ / .gem
或仅卸载rails：
gem uninstall -a rails
或者如果您使用sudo安装：
sudo gem uninstall -a rails
答案 4 :(得分：0)
您尚未指定要卸载的gem，请尝试gem uninstall rails。
答案 5 :(得分：0)
sudo gem uninstall rails -v 4.0.0.beta1
应该有所帮助。
答案 6 :(得分：0)
首先，您应该了解 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删除它：
gem uninstall rails
否则，您可能必须使用 sudo ：
sudo gem uninstall rails
注意：您可以按照以下方式检查您的导轨版本：
本地：
gem list rails
全局：
sudo gem list rails
答案 7 :(得分：0)
我还必须卸载Railties，一切正常。
答案 8 :(得分：0)
您只需尝试此命令。它将有助于卸载所有rails “宝石卸载铁路” 我认为这是完全卸载所有导轨的唯一方法