找不到铁路

Question

当我输入

rails _4.2.0.rc2_ new hello_app

我收到此错误

/Library/Ruby/Site/2.0.0/rubygems/dependency.rb:315:in `to_specs': Could not find 'railties' (=  4.2.0.rc2) - did find: [railties-4.1.8] (Gem::LoadError)
Checked in 'GEM_PATH=/Users/a11/.gem/ruby/2.0.0:/Library/Ruby/Gems/2.0.0:/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/gems/2.0.0', execute `gem env` for more information
from /Library/Ruby/Site/2.0.0/rubygems/dependency.rb:324:in `to_spec'
from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_gem.rb:64:in `gem'
from /usr/bin/rails:22:in `<main>'

我尝试使用

安装railsties 4.2.0.rc2

gem install railties --pre

Answer 1

如果您想尝试使用新的rails版本，则需要执行

gem install rails --pre

而不是

gem install railties --pre

将Rails框架作为其核心，但并非总体而言。有关详细信息，请参阅official documentation。

Answer 2

我完全重新安装了导轨

gem uninstall railties -v 4.2.0.rc2

sudo gem install rails -v 4.2.0.rc2

并解决了它。