rails生成模型：错误

我是Ruby on Rails的新手。我终于成功地在ubuntu 11上安装了rails，并创建了一个“rails new myapp”应用程序。rails生成模型：错误

但同时产生与模型“捆绑高管轨生成模型评论用户：字符串USER_COMMENT：文本”我收到以下错误：

我毫无头绪的可能是什么地方出了错。

/home/pratuat/.rvm/gems/ruby-1.9.2-p290/gems/execjs-1.2.9/lib/execjs/runtimes.rb:47:in `autodetect': Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs for a list of available runtimes. (ExecJS::RuntimeUnavailable) 
    from /home/pratuat/.rvm/gems/ruby-1.9.2-p290/gems/execjs-1.2.9/lib/execjs.rb:5:in `' 
    from /home/pratuat/.rvm/gems/ruby-1.9.2-p290/gems/execjs-1.2.9/lib/execjs.rb:4:in `' 
    from /home/pratuat/.rvm/gems/ruby-1.9.2-p290/gems/coffee-script-2.2.0/lib/coffee_script.rb:1:in `require' 
    from /home/pratuat/.rvm/gems/ruby-1.9.2-p290/gems/coffee-script-2.2.0/lib/coffee_script.rb:1:in `' 
    from /home/pratuat/.rvm/gems/ruby-1.9.2-p290/gems/coffee-script-2.2.0/lib/coffee-script.rb:1:in `require' 
    from /home/pratuat/.rvm/gems/ruby-1.9.2-p290/gems/coffee-script-2.2.0/lib/coffee-script.rb:1:in `' 
    from /home/pratuat/.rvm/gems/ruby-1.9.2-p290/gems/coffee-rails-3.1.1/lib/coffee-rails.rb:1:in `require' 
    from /home/pratuat/.rvm/gems/ruby-1.9.2-p290/gems/coffee-rails-3.1.1/lib/coffee-rails.rb:1:in `' 
    from /home/pratuat/.rvm/gems/[email protected]/gems/bundler-1.0.21/lib/bundler/runtime.rb:68:in `require' 
    from /home/pratuat/.rvm/gems/[email protected]/gems/bundler-1.0.21/lib/bundler/runtime.rb:68:in `block (2 levels) in require' 
    from /home/pratuat/.rvm/gems/[email protected]/gems/bundler-1.0.21/lib/bundler/runtime.rb:66:in `each' 
    from /home/pratuat/.rvm/gems/[email protected]/gems/bundler-1.0.21/lib/bundler/runtime.rb:66:in `block in require' 
    from /home/pratuat/.rvm/gems/[email protected]/gems/bundler-1.0.21/lib/bundler/runtime.rb:55:in `each' 
    from /home/pratuat/.rvm/gems/[email protected]/gems/bundler-1.0.21/lib/bundler/runtime.rb:55:in `require' 
    from /home/pratuat/.rvm/gems/[email protected]/gems/bundler-1.0.21/lib/bundler.rb:122:in `require' 
    from /home/pratuat/Documents/rails/railsdemo/config/application.rb:7:in `' 
    from /home/pratuat/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.1.3/lib/rails/commands.rb:21:in `require' 
    from /home/pratuat/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.1.3/lib/rails/commands.rb:21:in `' 
    from script/rails:6:in `require' 
    from script/rails:6:in `'

来源

2011-12-04 pratuat

可能重复的[Rails 3.1错误 - 无法找到JavaScript运行时？]（http://stackoverflow.com/questions/7092107/rails-3-1-error-could-not-find-a-javascript-运行时） –

https://github.com/sstephenson/execjs

你需要从运行时的那个列表中进行选择。我发现的最简单的是therubyracer。将其添加到您的Gemfile中，然后执行bundle install。

gem "therubyracer"

之后，你的模型生成器应该工作。

来源

2011-12-04 13:20:03 Preacher

我也注意到你需要** node.js **或** gem'execjs'**安装在Ubuntu上。 – pratuat

如果你安装node.js，你不需要为新的应用程序做任何这样的事情，因为它被rails作为你的javascript运行时获取。 – Aras

rails生成模型：错误

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