运行rails new时Rubygems问题

Question

对不起,这可能是一个基本问题,但我是rails的新手.我想通过命令启动一个新的rails项目rails new projName.在这个过程的中间我收到了这条消息:

run  bundle install

Your user account isn't allowed to install to the system Rubygems.
You can cancel this installation and run:

bundle install --path vendor/bundle

to install the gems into ./vendor/bundle/, or you can enter your password
and install the bundled gems to Rubygems using sudo.

Password:

我不太确定是否应该提供密码,但是我搜索了一下,我发现这样做是安全的(或者至少是我所理解的).

最后我得到了这个警告:

Warning: You're using Rubygems 2.0.14 with Spring. Upgrade to at least Rubygems 2.1.0 and run `gem pristine --all` for better startup performance.
* bin/rake: spring inserted
* bin/rails: spring inserted

所以我试着跑gem install Rubygems,我得到了:

ERROR:  Could not find a valid gem 'Rubygems' (>= 0) in any repository
ERROR:  Possible alternatives: ruby_gem, ruby_gem_eg, ruby-rets, ruby-gen, rubyless

我试过了gem install rubygems-update,我得到了:

ERROR:  While executing gem ... (Gem::FilePermissionError)
    You don't have write permissions for the /Library/Ruby/Gems/2.0.0 directory.

我已经通过RVM安装了rails,我不确定为什么我有这些权限问题.因为我对宝石没有经验,所以我被困住了,不知道如何解决这些问题.

Answer 1

运行一个应该足够了:

gem update --system

将Rubygem升级到最新版本.