使用

Question

嗨，我是刚认识红宝石的rails。

我已经在我的mac上安装了rvm

默认的红宝石是1.8.7

$ ruby -v
ruby 1.8.7 (2012-02-08 patchlevel 358) [universal-darwin10.0]
$ rails -v
Rails 2.3.18
$ gem -v
2.2.2

当我尝试使用ruby2.1.0时，我猜rails加载失败了

$ rvm use 2.1.0
Using /usr/local/rvm/gems/ruby-2.1.0
$ ruby -v
ruby 2.1.0p0 (2013-12-25 revision 44422) [x86_64-darwin10.0]
$ rails -v
/usr/local/rvm/rubies/ruby-2.1.0/lib/ruby/site_ruby/2.1.0/rubygems/dependency.rb:298:in `to_specs': Could not find 'railties' (>= 0) among 14 total gem(s) (Gem::LoadError)
    from /usr/local/rvm/rubies/ruby-2.1.0/lib/ruby/site_ruby/2.1.0/rubygems/dependency.rb:309:in `to_spec'
    from /usr/local/rvm/rubies/ruby-2.1.0/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_gem.rb:53:in `gem'
    from /usr/local/rvm/rubies/ruby-2.1.0/bin/rails:22:in `<main>'
$ gem -v
2.2.2

我不知道该怎么解决

以下是所知的rvm列表

$ rvm list known
# MRI Rubies
[ruby-]1.8.6[-p420]
[ruby-]1.8.7[-p374]
[ruby-]1.9.1[-p431]
[ruby-]1.9.2[-p320]
[ruby-]1.9.3[-p484]
[ruby-]2.0.0-p195
[ruby-]2.0.0[-p353]
[ruby-]2.1.0
[ruby-]2.1-head
ruby-head

# GoRuby
goruby

# Topaz
topaz

# TheCodeShop - MRI experimental patches
tcs

# jamesgolick - All around gangster
jamesgolick

# Minimalistic ruby implementation - ISO 30170:2012
mruby[-head]

# JRuby
jruby-1.6.8
jruby-1.7.6
jruby-1.7.9
jruby[-1.7.10]
jruby-head

# Rubinius
rbx-2.0.0
rbx-2.1.1
rbx[-2.2.4]
rbx-head

# Ruby Enterprise Edition
ree-1.8.6
ree[-1.8.7][-2012.02]

# Kiji
kiji

# MagLev
maglev[-head]
maglev-1.0.0

# Mac OS X Snow Leopard Or Newer
macruby-0.10
macruby-0.11
macruby[-0.12]
macruby-nightly
macruby-head

# Opal
opal

# IronRuby
ironruby[-1.1.3]
ironruby-head

rvm信息

rvm信息

ruby-2.1.0:

  rvm:
    version:      "rvm 1.25.17 (stable) by Wayne E. Seguin <wayneeseguin@gmail.com>, Michal Papis <mpapis@gmail.com> [https://rvm.io/]"
    updated:      "2 days 6 hours 43 minutes 42 seconds ago"
    path:         "/usr/local/rvm"

  ruby:
    interpreter:  "ruby"
    version:      "2.1.0p0"
    date:         "2013-12-25"
    platform:     "x86_64-darwin10.0"
    patchlevel:   "2013-12-25 revision 44422"
    full_version: "ruby 2.1.0p0 (2013-12-25 revision 44422) [x86_64-darwin10.0]"

  homes:
    gem:          "/usr/local/rvm/gems/ruby-2.1.0"
    ruby:         "/usr/local/rvm/rubies/ruby-2.1.0"

  binaries:
    ruby:         "/usr/local/rvm/rubies/ruby-2.1.0/bin/ruby"
    irb:          "/usr/local/rvm/rubies/ruby-2.1.0/bin/irb"
    gem:          "/usr/local/rvm/rubies/ruby-2.1.0/bin/gem"
    rake:         "/usr/local/rvm/rubies/ruby-2.1.0/bin/rake"

  environment:
    PATH:         "/usr/local/rvm/gems/ruby-2.1.0/bin:/usr/local/rvm/gems/ruby-2.1.0@global/bin:/usr/local/rvm/rubies/ruby-2.1.0/bin:/usr/local/rvm/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin"
    GEM_HOME:     "/usr/local/rvm/gems/ruby-2.1.0"
    GEM_PATH:     "/usr/local/rvm/gems/ruby-2.1.0:/usr/local/rvm/gems/ruby-2.1.0@global"
    MY_RUBY_HOME: "/usr/local/rvm/rubies/ruby-2.1.0"
    IRBRC:        "/usr/local/rvm/rubies/ruby-2.1.0/.irbrc"
    RUBYOPT:      ""
    gemset:       ""

Answer 1

看起来您已经在global gemset中安装了rails。你能做的是：

1. 从global宝石组中移除rails。
2. 然后将Rails安装在单独的gemset中。但是，据我所知，Rails 2.3.18与Ruby2.1.0不兼容。

以下是如何做到这一点的或多或少准确的例子：

rvm use 2.1.0@global         # switching to global gemset
gem uninstall rails          # removing rails gem
rvm use 2.1.0@rails --create # creating a separate gemset for rails
gem install rails            # installing rails

为了有效地使用RVM，您需要查阅gemset文档.1。

就这样!

更新.我相信您已经在sudo命令下安装了RVM。为了解决这个问题，请执行以下步骤：

rvm implode                             # remove RVM
\curl -sSL https://get.rvm.io | bash    # install it again
rvm install 2.1.0                       # install Ruby 2.1.0
rvm use 2.1.0@rails --create --default  # create default gemset for Rails
gem install rails                       # install Rails itself

为了避免权限问题，我强烈建议您在安装gems时不要使用sudo。

Answer 2

• 重新启动终端/控制台
• 去你的项目地点
• 运行rvm use ruby-2.1.0 --default

现在，它将通过运行rvm list显示当前的rvm。

然后，将显示所有已安装的rvm版本以及当前选择的带有*符号的版本。

Answer 3

运行以下命令：

sudo gem install rails
bundle install
rails s