如果我的 ruby 版本正确，为什么在 Rails 控制台中出现语法错误？答案

【问题标题】：Why I get syntax error in Rails console if my ruby version is correct?如果我的 ruby 版本正确，为什么在 Rails 控制台中出现语法错误？
【发布时间】：2012-09-09 14:15:00
【问题描述】：

我添加了 gem 'pry-rails'，当我运行 rails 控制台时，我收到以下错误：

Loading development environment (Rails 3.2.6)
/Users/rege/.rvm/gems/ruby-1.9.3-p194@network/gems/bundler-1.2.0/lib/bundler/dsl.rb:35:in `eval_gemfile': Gemfile syntax error: (Bundler::GemfileError)
/Users/rege/Code/Network/Gemfile:106: syntax error, unexpected ':', expecting $end
gem 'ruby-readability', require: 'readability'
                                ^
    from /Users/rege/.rvm/gems/ruby-1.9.3-p194@network/gems/bundler-1.2.0/lib/bundler/dsl.rb:7:in `evaluate'
    from /Users/rege/.rvm/gems/ruby-1.9.3-p194@network/gems/bundler-1.2.0/lib/bundler/definition.rb:18:in `build'
    from /Users/rege/.rvm/gems/ruby-1.9.3-p194@network/gems/bundler-1.2.0/lib/bundler.rb:144:in `definition'
    from /Users/rege/.rvm/gems/ruby-1.9.3-p194@network/gems/bundler-1.2.0/lib/bundler.rb:112:in `setup'
    from /Users/rege/.rvm/gems/ruby-1.9.3-p194@network/gems/bundler-1.2.0/lib/bundler/setup.rb:17

Frame number: 0/4
>> RUBY_VERSION
"1.9.3"

我的宝石文件：

...
group :development do
  gem 'rack-mini-profiler'
  gem 'pry-rails'
end
...
gem 'ruby-readability', require: 'readability'
...

当我将 gem 'ruby-readability', require: 'readability' 更改为 gem 'ruby-readability', :require => 'readability' 时，我收到下一个错误：

Loading development environment (Rails 3.2.6)
/Users/rege/.rvm/gems/ruby-1.9.3-p194@network/gems/bundler-1.2.0/lib/bundler/definition.rb:364:in `validate_ruby!': Your Ruby version is 1.8.7, but your Gemfile specified 1.9.3 (Bundler::RubyVersionMismatch)
    from /Users/rege/.rvm/gems/ruby-1.9.3-p194@network/gems/bundler-1.2.0/lib/bundler.rb:112:in `setup'
    from /Users/rege/.rvm/gems/ruby-1.9.3-p194@network/gems/bundler-1.2.0/lib/bundler/setup.rb:17

我的 rvm 信息

> rvm info                                                                                                                                                     /Users/rege/Code/Network 1.9.3p194 develop!@37a80c4

ruby-1.9.3-p194@network:

  system:
    uname:       "Darwin Darek-MacBook.local 11.4.0 Darwin Kernel Version 11.4.0: Mon Apr  9 19:32:15 PDT 2012; root:xnu-1699.26.8~1/RELEASE_X86_64 x86_64"
    bash:        "/bin/bash => GNU bash, version 3.2.48(1)-release (x86_64-apple-darwin11)"
    zsh:         "/bin/zsh => zsh 4.3.11 (i386-apple-darwin11.0)"

  rvm:
    version:      "rvm 1.15.8 (stable) by Wayne E. Seguin <wayneeseguin@gmail.com>, Michal Papis <mpapis@gmail.com> [https://rvm.io/]"
    updated:      "19 hours 59 minutes 37 seconds ago"

  ruby:
    interpreter:  "ruby"
    version:      "1.9.3p194"
    date:         "2012-04-20"
    platform:     "x86_64-darwin11.4.0"
    patchlevel:   "2012-04-20 revision 35410"
    full_version: "ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-darwin11.4.0]"

  homes:
    gem:          "/Users/rege/.rvm/gems/ruby-1.9.3-p194@network"
    ruby:         "/Users/rege/.rvm/rubies/ruby-1.9.3-p194"

  binaries:
    ruby:         "/Users/rege/.rvm/rubies/ruby-1.9.3-p194/bin/ruby"
    irb:          "/Users/rege/.rvm/rubies/ruby-1.9.3-p194/bin/irb"
    gem:          "/Users/rege/.rvm/rubies/ruby-1.9.3-p194/bin/gem"
    rake:         "/Users/rege/.rvm/gems/ruby-1.9.3-p194@global/bin/rake"

  environment:
    PATH:         "/Users/rege/.rvm/gems/ruby-1.9.3-p194@network/bin:/Users/rege/.rvm/gems/ruby-1.9.3-p194@global/bin:/Users/rege/.rvm/rubies/ruby-1.9.3-p194/bin:/Users/rege/.rvm/bin:/usr/local/bin:/opt/local/bin:/opt/local/sbin/:/usr/bin:/bin:/usr/sbin:/sbin:/usr/X11/bin"
    GEM_HOME:     "/Users/rege/.rvm/gems/ruby-1.9.3-p194@network"
    GEM_PATH:     "/Users/rege/.rvm/gems/ruby-1.9.3-p194@network:/Users/rege/.rvm/gems/ruby-1.9.3-p194@global"
    MY_RUBY_HOME: "/Users/rege/.rvm/rubies/ruby-1.9.3-p194"
    IRBRC:        "/Users/rege/.rvm/rubies/ruby-1.9.3-p194/.irbrc"
    RUBYOPT:      ""
    gemset:       "network"

【问题讨论】：

标签： ruby-on-rails ruby-on-rails-3 gem pry

【解决方案1】：

rvm info 对您的环境有何评价？ ruby -v 呢？最后，which ruby?我怀疑你没有运行正确的 ruby，也许你的路径上还有另一个。

【讨论】：

【解决方案2】：

根据this 文档，您应该指定类似

 gem "ruby-readability", :require => 'readability'

您在第二种方法中已经完成了。您收到此错误

 Your Ruby version is 1.8.7, but your Gemfile specified 1.9.3

因为从 Bundler 1.2 开始，您拥有 validate your Ruby version 这个非常有用的新功能，所以如果您想使用 ruby 1.8.7，请在您的 Gemfile 顶部指定

ruby '1.8.7'

【讨论】：

但问题是因为我不想使用 1.8.7 但我得到了这个奇怪的错误

【解决方案3】：

问题是因为我在我的pryrc:require 'pry-vterm_aliases' 中从我的pryrc 中删除了这个问题解决了

【讨论】：