我尝试安装 Rails 4.2.0.beta1(2014 年 8 月 20 日发布)。我收到错误“排序期间发现未解决的依赖项”。以下是详细信息:
$ ruby -v
ruby 2.1.2p95 (2014-05-08 revision 45877) [x86_64-darwin13.0]
$ gem -v
2.4.1
$ gem install rails --pre
ERROR: While executing gem ... (Gem::DependencyError)
Unresolved dependency found during sorting - activesupport (>= 4.0)
(requested by sprockets-rails-3.0.0.beta1)
如何安装 Rails 4.2.0.beta1?