Ruby on rails 当我在一个新项目上尝试使用命令rails服务器时，我得到了这个错误

我正在运行Debian7。我正在使用RVM。我也在运行mySQL。我对ruby和rails都是新手。如果我看起来很天真，请原谅我

我使用：

rails新项目名-d mysql

然后我进入该目录并运行：

rails服务器

然后我得到这个错误：

/home/user/.rvm/gems/ruby-2.0.0-p247/gems/execjs-2.0.0/lib/execjs/runtimes.rb:51:in `autodetect': Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs for a list of available runtimes. (ExecJS::RuntimeUnavailable)
    from /home/user/.rvm/gems/ruby-2.0.0-p247/gems/execjs-2.0.0/lib/execjs.rb:5:in `'
    from /home/user/.rvm/gems/ruby-2.0.0-p247/gems/execjs-2.0.0/lib/execjs.rb:4:in `'
    from /home/user/.rvm/gems/ruby-2.0.0-p247/gems/coffee-script-2.2.0/lib/coffee_script.rb:1:in `require'
    from /home/user/.rvm/gems/ruby-2.0.0-p247/gems/coffee-script-2.2.0/lib/coffee_script.rb:1:in `'
    from /home/user/.rvm/gems/ruby-2.0.0-p247/gems/coffee-script-2.2.0/lib/coffee-script.rb:1:in `require'
    from /home/user/.rvm/gems/ruby-2.0.0-p247/gems/coffee-script-2.2.0/lib/coffee-script.rb:1:in `'
    from /home/user/.rvm/gems/ruby-2.0.0-p247/gems/coffee-rails-3.2.2/lib/coffee-rails.rb:1:in `require'
    from /home/user/.rvm/gems/ruby-2.0.0-p247/gems/coffee-rails-3.2.2/lib/coffee-rails.rb:1:in `'
    from /home/user/.rvm/gems/ruby-2.0.0-p247/gems/bundler-1.3.5/lib/bundler/runtime.rb:72:in `require'
    from /home/user/.rvm/gems/ruby-2.0.0-p247/gems/bundler-1.3.5/lib/bundler/runtime.rb:72:in `block (2 levels) in require'
    from /home/user/.rvm/gems/ruby-2.0.0-p247/gems/bundler-1.3.5/lib/bundler/runtime.rb:70:in `each'
    from /home/user/.rvm/gems/ruby-2.0.0-p247/gems/bundler-1.3.5/lib/bundler/runtime.rb:70:in `block in require'
    from /home/user/.rvm/gems/ruby-2.0.0-p247/gems/bundler-1.3.5/lib/bundler/runtime.rb:59:in `each'
    from /home/user/.rvm/gems/ruby-2.0.0-p247/gems/bundler-1.3.5/lib/bundler/runtime.rb:59:in `require'
    from /home/user/.rvm/gems/ruby-2.0.0-p247/gems/bundler-1.3.5/lib/bundler.rb:132:in `require'
    from /home/user/htdocs/simple_cms/config/application.rb:7:in `'
    from /home/user/.rvm/gems/ruby-2.0.0-p247/gems/railties-3.2.14/lib/rails/commands.rb:53:in `require'
    from /home/user/.rvm/gems/ruby-2.0.0-p247/gems/railties-3.2.14/lib/rails/commands.rb:53:in `block in '
    from /home/user/.rvm/gems/ruby-2.0.0-p247/gems/railties-3.2.14/lib/rails/commands.rb:50:in `tap'
    from /home/user/.rvm/gems/ruby-2.0.0-p247/gems/railties-3.2.14/lib/rails/commands.rb:50:in `'
    from script/rails:6:in `require'
    from script/rails:6:in `'

我转到了提供的链接：

“安装”下的“阅读我”显示：

gem安装execjs

---

我这样做，仍然会得到相同的错误。我迷路了。

您必须首先安装Javascript运行时，例如

对于Debian，上有安装说明

---

编辑：列出支持的Javascript运行时。

我确实安装了therubyracer。我将必要的gem放入项目gem文件中。这似乎解决了这个问题。

除了安装node，还有一个Ruby解决方案

gem安装rubyracer

。