Ruby on rails rails的错误

因此，当我尝试使用

rails s

启动服务器时

/usr/local/rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/gems/sqlite3-1.3.8/lib/sqlite3.rb:6:in `require': cannot load such file -- sqlite3/sqlite3_native (LoadError)
    from /usr/local/rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/gems/sqlite3-1.3.8/lib/sqlite3.rb:6:in `rescue in <top (required)>'
    from /usr/local/rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/gems/sqlite3-1.3.8/lib/sqlite3.rb:2:in `<top (required)>'
    from /usr/local/rvm/gems/ruby-2.0.0-p481@global/gems/bundler-1.6.2/lib/bundler/runtime.rb:76:in `require'
    from /usr/local/rvm/gems/ruby-2.0.0-p481@global/gems/bundler-1.6.2/lib/bundler/runtime.rb:76:in `block (2 levels) in require'
    from /usr/local/rvm/gems/ruby-2.0.0-p481@global/gems/bundler-1.6.2/lib/bundler/runtime.rb:72:in `each'
    from /usr/local/rvm/gems/ruby-2.0.0-p481@global/gems/bundler-1.6.2/lib/bundler/runtime.rb:72:in `block in require'
    from /usr/local/rvm/gems/ruby-2.0.0-p481@global/gems/bundler-1.6.2/lib/bundler/runtime.rb:61:in `each'
    from /usr/local/rvm/gems/ruby-2.0.0-p481@global/gems/bundler-1.6.2/lib/bundler/runtime.rb:61:in `require'
    from /usr/local/rvm/gems/ruby-2.0.0-p481@global/gems/bundler-1.6.2/lib/bundler.rb:132:in `require'
    from /Users/idrisk/rails_projects/first_app/config/application.rb:7:in `<top (required)>'
    from /usr/local/rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/gems/railties-4.0.5/lib/rails/commands.rb:74:in `require'
    from /usr/local/rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/gems/railties-4.0.5/lib/rails/commands.rb:74:in `block in <top (required)>'
    from /usr/local/rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/gems/railties-4.0.5/lib/rails/commands.rb:71:in `tap'
    from /usr/local/rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/gems/railties-4.0.5/lib/rails/commands.rb:71:in `<top (required)>'
    from bin/rails:4:in `require'
    from bin/rails:4:in `<main>'

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我不太清楚这是什么意思。我尝试过重新启动和类似的事情。但似乎什么都不起作用。想法

尝试用RVM更新Ruby和Rails-RVM是一个命令行工具，它允许您轻松地安装、管理和使用多个Ruby环境，从解释器到一组GEM

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以下是网站：

OSX Mavericks@72DFBF5BA0DF5BE9“gem update”然后是“gem install rails”同样的错误仍然是@72DFBF5BA0DF5BE9“gem install sqlite3”安装@72DFBF5BA0DF5BE9可能尝试创建一个新的Rails应用程序，看看是Rails安装有问题还是应用程序有问题。Rails新示例创建一个gemset并为.rvmrc文件赋值。然后运行bundle命令。如果您创建了一个新的rails应用程序，然后直接按下rails s并接收rails选项，那么您很可能没有进入新应用程序的目录。请在目录Cd示例中重试。然后是铁轨

/usr/local/rvm/rubies/ruby-2.0.0-p481/lib/ruby/site_ruby/2.0.0/rubygems/dependency.rb:247:in `to_specs': Could not find railties (>= 0) amongst [bundler-1.6.2, bundler-unload-1.0.2, executable-hooks-1.3.1, gem-wrappers-1.2.4, rubygems-bundler-1.4.3, rvm-1.11.3.9] (Gem::LoadError)
    from /usr/local/rvm/rubies/ruby-2.0.0-p481/lib/ruby/site_ruby/2.0.0/rubygems/dependency.rb:256:in `to_spec'
    from /usr/local/rvm/rubies/ruby-2.0.0-p481/lib/ruby/site_ruby/2.0.0/rubygems.rb:1231:in `gem'
    from /usr/local/rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/bin/rails:18:in `<main>'
    from /usr/local/rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/bin/ruby_executable_hooks:15:in `eval'
    from /usr/local/rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/bin/ruby_executable_hooks:15:in `<main>'