Ruby on rails 如何从头开始我的Ruby环境？

我一直在尝试升级我的MacBook上的rails环境，但我搞砸了一些事情，但我不确定是什么。是否可以完全删除RVM、Ruby和Rails，从头开始？我对这一切应该如何运作感到困惑

我目前已经通过RVM安装了Ruby 1.8.7和1.9.2。我将rails升级到了3.0.9，但它现在拒绝工作，因为rake出现了一些错误

/Users/Moshe/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site\u ruby/1.9.1/rubygems/dependency.rb:247:in

to_specs]：在[rake-0.8.7、rake-0.8.7、rubygems-update-1.8.5]（Gem:：LoadError）中找不到rails（>=0）
from/Users/Moshe/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site\u ruby/1.9.1/rubygems/dependency.rb:256:in

to_spec' from/Users/Moshe/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site\u ruby/1.9.1/rubygems.rb:1182:in

gem'
from/Users/Moshe/.rvm/rubies/ruby-1.9.2-p180/bin/rails:18:in

'

我能做些什么来解决这个问题？我想回到Mac附带的ruby版本

（编辑：我在玩雪豹10.6.8）

Edit2:

现在我已经让rvm运行ruby 1.9.2和rails 3.0.9，但是，尝试使用

rails server

启动服务器会返回以下结果：

AppMachineMobile:hello Moshe$rails服务器

=>启动WEBrick

=>Rails 3.0.9应用程序在上开始开发

=>使用-d调用以分离

=>Ctrl-C关闭服务器

退出

/Users/Moshe/Development/Ruby/hello/config/initializers/new_rails_defaults.rb:14:ActionDispatch的未定义方法“generate_best_match=”:：Routing:Module（nomethoderor）

from/Library/Ruby/Gems/1.8/Gems/activesupport-3.0.9/lib/active_support/dependencies.rb:235:in'load'

from/Library/Ruby/Gems/1.8/Gems/activesupport-3.0.9/lib/active_support/dependencies.rb:235:in'load'

from/Library/Ruby/Gems/1.8/Gems/activesupport-3.0.9/lib/active_-support/dependencies.rb:225:in'load_-dependency'

from/Library/Ruby/Gems/1.8/Gems/activesupport-3.0.9/lib/active\u support/dependencies.rb:596:in'new\u constants\u in'

from/Library/Ruby/Gems/1.8/Gems/activesupport-3.0.9/lib/active_-support/dependencies.rb:225:in'load_-dependency'

from/Library/Ruby/Gems/1.8/Gems/activesupport-3.0.9/lib/active_support/dependencies.rb:235:in'load'

from/Library/Ruby/Gems/1.8/Gems/railties-3.0.9/lib/rails/engine.rb:201

from/Library/Ruby/Gems/1.8/Gems/railties-3.0.9/lib/rails/engine.rb:200:in'each'

from/Library/Ruby/Gems/1.8/Gems/railties-3.0.9/lib/rails/engine.rb:200

from/Library/Ruby/Gems/1.8/Gems/railties-3.0.9/lib/rails/initializable.rb:25:in'instance_exec'

from/Library/Ruby/Gems/1.8/Gems/railties-3.0.9/lib/rails/initializable.rb:25:in'run'

from/Library/Ruby/Gems/1.8/Gems/railties-3.0.9/lib/rails/initializable.rb:50:in'run_initializers'

from/Library/Ruby/Gems/1.8/Gems/railties-3.0.9/lib/rails/initializable.rb:49:in'each'

from/Library/Ruby/Gems/1.8/Gems/railties-3.0.9/lib/rails/initializable.rb:49:in'run_initializers'

from/Library/Ruby/Gems/1.8/Gems/railties-3.0.9/lib/rails/application.rb:134:in'initialize！'

from/Library/Ruby/Gems/1.8/Gems/railties-3.0.9/lib/rails/application.rb:77:in'send'

from/Library/Ruby/Gems/1.8/Gems/railties-3.0.9/lib/rails/application.rb:77:in'method_missing'

来自/Users/Moshe/Development/Ruby/hello/config/environment.rb:5

from/Users/Moshe/Development/Ruby/hello/config.ru:3:in'require'

from/Users/Moshe/Development/Ruby/hello/config.ru:3

from/Library/Ruby/Gems/1.8/Gems/rack-1.2.3/lib/rack/builder.rb:46:in'instance_eval'

from/Library/Ruby/Gems/1.8/Gems/rack-1.2.3/lib/rack/builder.rb:46:in'initialize'

from/Users/Moshe/Development/Ruby/hello/config.ru:1:in'new'

来自/Users/Moshe/Development/Ruby/hello/config.ru:1

---

我会尝试从头开始。检查已安装的rvms：

$rvm list

你应该得到这样的东西：

rvm rubies

   jruby-1.5.5 [ x86_64-java ]
   ree-1.8.7-2010.02 [ x86_64 ]
   ruby-1.8.6-p399 [ x86_64 ]
   ruby-1.8.7-p299 [ x86_64 ]
=> ruby-1.8.7-p302 [ x86_64 ]
   ruby-1.9.2-p0 [ x86_64 ]

对每个部件进行rvm卸载：

$rvm uninstall 1.8.7
$rvm uninstall 1.9.2

安装Ruby 1.8.7：

$ rvm install 1.8.7

安装最新的Ruby 1.9.2：

$ rvm install 1.9.2

设置您的默认值（如果需要，可设置为1.8.7）：

安装PostgreSQL和SQLite gems（假设是雪豹）：

安装导轨3（包括捆绑机）：

如果您在rails 2x项目中：

$rvm use 1.8.7

如果您在rails 3项目中：

$rvm use 1.9.2

当您在每个rvm中时，如果您使用bundler，则通过“bundle install”加载与项目关联的gem，如果您将所有内容都转储到您的环境中，则通过“rake gems:install”加载gem。rb

rm -rf .rvm .rvmrc

如果希望确保从头开始，请删除项目目录中的.rvmrc文件

除非您除了通过rvm安装一个系统范围的ruby之外，还安装了一个ruby，否则您将不再有“ruby”命令，除非您再次重新安装rvm

因此：

---

bash<我没有删除任何.rvm和.rvmrc文件。但我的问题已经解决了。我不知道这是怎么解决的。但我告诉你我做了什么。首先，我在Gemfile中使用了rails gem的不稳定版本。这就是问题发生的原因

gem 'rails', :path => '/home/user/life/rails'  #this is an unstable rails 4.0.0 beta

 #gem 'rails', '3.2.8' 

user@sandip:~/life/samplelogin$ rails c
/home/user/.rvm/rubies/ruby-1.9.3-p362/lib/ruby/site_ruby/1.9.1/rubygems/dependency.rb:247:in `to_specs': Could not find railties (>= 0) amongst [activerecord-deprecated_finders-0.0.1, arel-3.0.2, atomic-1.0.1, builder-3.1.4, bundler-1.2.3, bundler-1.2.3, erubis-2.7.0, hike-1.2.1, i18n-0.6.1, json-1.7.5, mail-2.5.3, mime-types-1.19, minitest-4.3.3, multi_json-1.5.0, mysql2-0.3.11, polyglot-0.3.3, rack-1.4.1, rack-test-0.6.2, rake-10.0.3, rake-0.9.2, rdoc-3.12, sprockets-2.8.2, sprockets-rails-2.0.0.rc1, thor-0.16.0, thread_safe-0.1.0, tilt-1.3.3, treetop-1.4.12, tzinfo-0.3.35] (Gem::LoadError)
    from /home/user/.rvm/rubies/ruby-1.9.3-p362/lib/ruby/site_ruby/1.9.1/rubygems/dependency.rb:256:in `to_spec'
    from /home/user/.rvm/rubies/ruby-1.9.3-p362/lib/ruby/site_ruby/1.9.1/rubygems.rb:1210:in `gem'
    from /home/user/.rvm/gems/ruby-1.9.3-p362/bin/rails:18:in `<main>'

然后运行bundle安装

那就做吧

user@sandip:~/life/samplelogin$ rails c
Loading development environment (Rails 3.2.8)
1.9.3p362 :001 >

这可能会有帮助：


rbenv是一款非常棒的管理红宝石的工具。
在您重新开始之前，请将rbenv作为RVM的替代品。它更干净，更容易使用
 这会移除rvm安装的红宝石吗？那么ruby的安装呢？据我所知，它将删除rvm安装的所有ruby版本以及gems。Max OSX附带的原始ruby无法如此轻松地删除。请查看以下答案：@Brian-根据该答案删除ruby将删除rvm，但现在我无法访问默认ruby！您的计算机上是否存在
/usr/bin/ruby
rm -rf .rvm .rvmrc

bash < <(curl -s https://rvm.beginrescueend.com/install/rvm)

gem 'rails', :path => '/home/user/life/rails'  #this is an unstable rails 4.0.0 beta

 #gem 'rails', '3.2.8' 

user@sandip:~/life/samplelogin$ rails c
/home/user/.rvm/rubies/ruby-1.9.3-p362/lib/ruby/site_ruby/1.9.1/rubygems/dependency.rb:247:in `to_specs': Could not find railties (>= 0) amongst [activerecord-deprecated_finders-0.0.1, arel-3.0.2, atomic-1.0.1, builder-3.1.4, bundler-1.2.3, bundler-1.2.3, erubis-2.7.0, hike-1.2.1, i18n-0.6.1, json-1.7.5, mail-2.5.3, mime-types-1.19, minitest-4.3.3, multi_json-1.5.0, mysql2-0.3.11, polyglot-0.3.3, rack-1.4.1, rack-test-0.6.2, rake-10.0.3, rake-0.9.2, rdoc-3.12, sprockets-2.8.2, sprockets-rails-2.0.0.rc1, thor-0.16.0, thread_safe-0.1.0, tilt-1.3.3, treetop-1.4.12, tzinfo-0.3.35] (Gem::LoadError)
    from /home/user/.rvm/rubies/ruby-1.9.3-p362/lib/ruby/site_ruby/1.9.1/rubygems/dependency.rb:256:in `to_spec'
    from /home/user/.rvm/rubies/ruby-1.9.3-p362/lib/ruby/site_ruby/1.9.1/rubygems.rb:1210:in `gem'
    from /home/user/.rvm/gems/ruby-1.9.3-p362/bin/rails:18:in `<main>'

 #gem 'rails', :path => '/home/user/life/rails'  #this is an unstable rails 4.0.0 beta'

gem 'rails', '3.2.8'

user@sandip:~/life/samplelogin$ rails c
Loading development environment (Rails 3.2.8)
1.9.3p362 :001 >