新的rails项目错误Rails 3答案

【问题标题】：new rails project error Rails 3新的rails项目错误Rails 3
【发布时间】：2011-07-25 15:55:07
【问题描述】：

我在启动新应用时从来没有遇到过问题，但是今天我在尝试运行 rails new murphy 时遇到了一个错误提示

/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:59:in `gem_original_require': no     such file to load -- active_support/core_ext/object/singleton_class (LoadError)
from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:59:in `require'
from /usr/local/lib/ruby/gems/1.8/gems/railties-3.0.0.beta2/lib/rails/generators.rb:6
from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:55:in `gem_original_require'
from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:55:in `require'
from /usr/local/lib/ruby/gems/1.8/gems/railties-3.0.0.beta2/lib/rails/commands/application.rb:10
from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:55:in `gem_original_require'
from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:55:in `require'
from /usr/local/lib/ruby/gems/1.8/gems/railties-3.0.0.beta2/bin/rails:30
from /usr/local/bin/rails:19:in `load'
from /usr/local/bin/rails:19

【问题讨论】：

好像安装了 Rails 的 3.0 beta 版本。正如 Chris Ledet 所说，您应该升级到最新的 3.0.x 版本。我还想建议您改用rvm。能够管理单个 gemset 非常值得花费安装时间。

标签： ruby-on-rails-3

【解决方案1】：

看起来您正在使用 Rails 3.0 测试版。尝试使用 Rails 3.0.9

gem install rails -v3.0.9

【讨论】：