宝石::规范差错 - 的Rails 3

Question

我有一个新的Rails安装，当我尝试运行控制台或任何rake任务，我得到看起来像这样的错误消息：

$ rails c 
[/.rvm/gems/ruby-1.9.2-p320/specifications/json_pure-1.7.0.gemspec] isn't a Gem::Specification (NilClass instead). 
[/.rvm/gems/ruby-1.9.2-p320/specifications/engineyard-1.4.29.gemspec] isn't a Gem::Specification (NilClass instead). 
[/.rvm/gems/ruby-1.9.2-p320/specifications/launchy-2.0.5.gemspec] isn't a Gem::Specification (NilClass instead). 
[/.rvm/gems/ruby-1.9.2-p320/specifications/engineyard-serverside-adapter-1.6.4.gemspec] isn't a Gem::Specification (NilClass instead). 
[/.rvm/gems/ruby-1.9.2-p320/specifications/escape-0.0.4.gemspec] isn't a Gem::Specification (NilClass instead). 
[/.rvm/gems/ruby-1.9.2-p320/specifications/highline-1.6.11.gemspec] isn't a Gem::Specification (NilClass instead). 
[/.rvm/gems/ruby-1.9.2-p320/specifications/net-ssh-2.2.2.gemspec] isn't a Gem::Specification (NilClass instead). 
[/.rvm/gems/ruby-1.9.2-p320/specifications/json_pure-1.7.0.gemspec] isn't a Gem::Specification (NilClass instead). 
[/.rvm/gems/ruby-1.9.2-p320/specifications/engineyard-1.4.29.gemspec] isn't a Gem::Specification (NilClass instead). 
[/.rvm/gems/ruby-1.9.2-p320/specifications/launchy-2.0.5.gemspec] isn't a Gem::Specification (NilClass instead). 
[/.rvm/gems/ruby-1.9.2-p320/specifications/engineyard-serverside-adapter-1.6.4.gemspec] isn't a Gem::Specification (NilClass instead). 
[/.rvm/gems/ruby-1.9.2-p320/specifications/escape-0.0.4.gemspec] isn't a Gem::Specification (NilClass instead). 
[/.rvm/gems/ruby-1.9.2-p320/specifications/highline-1.6.11.gemspec] isn't a Gem::Specification (NilClass instead). 
[/.rvm/gems/ruby-1.9.2-p320/specifications/net-ssh-2.2.2.gemspec] isn't a Gem::Specification (NilClass instead). 
[/.rvm/gems/ruby-1.9.2-p320/specifications/json_pure-1.7.0.gemspec] isn't a Gem::Specification (NilClss instead). 
[/.rvm/gems/ruby-1.9.2-p320/specifications/engineyard-1.4.29.gemspec] isn't a Gem::Specification (Nillass instead). 
[/.rvm/gems/ruby-1.9.2-p320/specifications/launchy-2.0.5.gemspec] isn't a Gem::Specification (NilClas instead). 
[/.rvm/gems/ruby-1.9.2-p320/specifications/engineyard-serverside-adapter-1.6.4.gemspec] isn't a Gem::pecification (NilClass instead). 
[/.rvm/gems/ruby-1.9.2-p320/specifications/escape-0.0.4.gemspec] isn't a Gem::Specification (NilClassinstead). 
[/.rvm/gems/ruby-1.9.2-p320/specifications/highline-1.6.11.gemspec] isn't a Gem::Specification (NilClss instead). 
[/.rvm/gems/ruby-1.9.2-p320/specifications/net-ssh-2.2.2.gemspec] isn't a Gem::Specification (NilClas instead). 
/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/irb/completion.rb:9:in `require': no such file to load --readline (LoadError) 
     from /.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/irb/completion.rb:9:in `<top (required)>' 
     from /.rvm/gems/ruby-1.9.2-p320/gems/railties-3.0.4/lib/rails/commands/console.rb:3:in `requie' 
     from /.rvm/gems/ruby-1.9.2-p320/gems/railties-3.0.4/lib/rails/commands/console.rb:3:in `<top required)>' 
     from /.rvm/gems/ruby-1.9.2-p320/gems/railties-3.0.4/lib/rails/commands.rb:20:in `require' 
     from /.rvm/gems/ruby-1.9.2-p320/gems/railties-3.0.4/lib/rails/commands.rb:20:in `<top (requird)>' 
     from script/rails:6:in `require' 
     from script/rails:6:in `<main>' 

任何想法可能是造成这个？

谢谢。

Answer 1

我认为这是readline的

/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/irb/completion.rb:9:in'需要'：没有这样的文件加载--readline（LoadError）

下面是一些资源：

https://rvm.io//packages/readline/

Problems with the rails console, RVM and readline

如果上面不为你工作，那么你可以做w ^帽子我没有和这里使用的解决方案：

Rails3 and readline problem

这是在项目中包含的RB-readline的宝石。 （我不知道如果这被认为是一个黑客或不）

https://github.com/luislavena/rb-readline

希望有所帮助。我花了一段时间才让控制台工作一次，这有时令人沮丧。更不用说我必须在更新一些Ubuntu软件包后再次执行此操作。