Question

您好我在Windows 8机器上使用ruby on rails并且我很难在我的机器上设置ruby 2.1。当我运行rails时，我收到以下错误：

C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/execjs-2.2.0/lib/execjs/run
times.rb:51:in `autodetect': Could not find a JavaScript runtime. See https://gi
thub.com/sstephenson/execjs for a list of available runtimes. (ExecJS::RuntimeUn
available)
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/execjs-2.2.0/l
ib/execjs.rb:5:in `<module:ExecJS>'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/execjs-2.2.0/l
ib/execjs.rb:4:in `<top (required)>'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/uglifier-2.5.1
/lib/uglifier.rb:3:in `require'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/uglifier-2.5.1
/lib/uglifier.rb:3:in `<top (required)>'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/bundler-1.6.3/
lib/bundler/runtime.rb:76:in `require'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/bundler-1.6.3/
lib/bundler/runtime.rb:76:in `block (2 levels) in require'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/bundler-1.6.3/
lib/bundler/runtime.rb:72:in `each'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/bundler-1.6.3/
lib/bundler/runtime.rb:72:in `block in require'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/bundler-1.6.3/
lib/bundler/runtime.rb:61:in `each'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/bundler-1.6.3/
lib/bundler/runtime.rb:61:in `require'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/bundler-1.6.3/
lib/bundler.rb:132:in `require'
        from C:/HandCo-op/HandCo-op/config/application.rb:7:in `<top (required)>
'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.1.2
.rc1/lib/rails/commands/commands_tasks.rb:79:in `require'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.1.2
.rc1/lib/rails/commands/commands_tasks.rb:79:in `block in server'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.1.2
.rc1/lib/rails/commands/commands_tasks.rb:76:in `tap'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.1.2
.rc1/lib/rails/commands/commands_tasks.rb:76:in `server'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.1.2
.rc1/lib/rails/commands/commands_tasks.rb:40:in `run_command!'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.1.2
.rc1/lib/rails/commands.rb:17:in `<top (required)>'
        from bin/rails:4:in `require'
        from bin/rails:4:in `<main>'

我认为这是因为我需要ruby 2.1并且安装的版本是2.0。有谁知道我应该怎么做才能解决这些错误？非常感谢任何知道为什么我不能运行rails的人。

Answer 1

很有趣，我刚刚用ruby 2.1初始化了一个新的rails 4项目，当忘记更新Gemfile时，几分钟前我收到了确切的错误消息。

更新Gemfile取消注释gem 'therubyracer'行，如下所示：

# Gemfile
gem 'therubyracer',  platforms: :ruby

更新bundle后运行Gemfile命令。

错误消息是因为您没有安装运行时。

更新：Windows上的选项

我已成功在Windows 7+ x64 arch上安装和使用closure-compiler gem。我的开发框会不时地从linux切换到Windows，所以我的Gemfile设置如下：

# Gemfile

gem 'therubyracer', :platforms => :ruby
gem 'execjs', :platforms => :ruby

gem 'closure-compiler'

通过更新以下行，更新config/environments/中的任一环境或config/application.rb中的应用范围内的配置：

config.assets.js_compressor = :closure

有关RailsGuide的更多信息，请参阅Customizing the Pipeline。

rails s命令不起作用

1 个答案: