在Ubuntu 14.04中启动新的rails应用程序时出错

时间：2016-07-13 19:27:36

标签： ruby-on-rails

我正在尝试在Ubuntu 14.04上创建一个新的rails应用程序。这是我第一次在Ubuntu中使用Rails（以前在Windows 10中开发）。我设置了开发环境，我的ruby版本是ruby 2.3.0p0，rails版本是5.0.0。一旦我的开发环境建立起来，我就通过输入终端来开始一个新项目：

rails new MyApp

然后，我输入了：

cd MyApp
bundle install

最后，我尝试输入以下命令启动我的rails服务器：

rails s

而不是rails服务器启动，我在终端中得到了这个响应：

/home/rusty/.rvm/gems/ruby-2.3.0/gems/bundler-1.12.5/lib/bundler/runtime.rb:89:in `rescue in block (2 levels) in require': There was an error while trying to load the gem 'uglifier'. (Bundler::GemRequireError)
Gem Load Error is: Could not find a JavaScript runtime. See https://github.com/rails/execjs for a list of available runtimes.
Backtrace for gem load error is:
/home/rusty/.rvm/gems/ruby-2.3.0/gems/execjs-2.7.0/lib/execjs/runtimes.rb:58:in `autodetect'
/home/rusty/.rvm/gems/ruby-2.3.0/gems/execjs-2.7.0/lib/execjs.rb:5:in `<module:ExecJS>'
/home/rusty/.rvm/gems/ruby-2.3.0/gems/execjs-2.7.0/lib/execjs.rb:4:in `<top (required)>'
/home/rusty/.rvm/gems/ruby-2.3.0/gems/uglifier-3.0.0/lib/uglifier.rb:5:in `require'
/home/rusty/.rvm/gems/ruby-2.3.0/gems/uglifier-3.0.0/lib/uglifier.rb:5:in `<top (required)>'
/home/rusty/.rvm/gems/ruby-2.3.0/gems/bundler-1.12.5/lib/bundler/runtime.rb:86:in `require'
/home/rusty/.rvm/gems/ruby-2.3.0/gems/bundler-1.12.5/lib/bundler/runtime.rb:86:in `block (2 levels) in require'
/home/rusty/.rvm/gems/ruby-2.3.0/gems/bundler-1.12.5/lib/bundler/runtime.rb:81:in `each'
/home/rusty/.rvm/gems/ruby-2.3.0/gems/bundler-1.12.5/lib/bundler/runtime.rb:81:in `block in require'
/home/rusty/.rvm/gems/ruby-2.3.0/gems/bundler-1.12.5/lib/bundler/runtime.rb:70:in `each'
/home/rusty/.rvm/gems/ruby-2.3.0/gems/bundler-1.12.5/lib/bundler/runtime.rb:70:in `require'
/home/rusty/.rvm/gems/ruby-2.3.0/gems/bundler-1.12.5/lib/bundler.rb:102:in `require'
/home/rusty/Maple/config/application.rb:7:in `<top (required)>'
/home/rusty/.rvm/gems/ruby-2.3.0/gems/railties-5.0.0/lib/rails/commands/commands_tasks.rb:88:in `require'
/home/rusty/.rvm/gems/ruby-2.3.0/gems/railties-5.0.0/lib/rails/commands/commands_tasks.rb:88:in `block in server'
/home/rusty/.rvm/gems/ruby-2.3.0/gems/railties-5.0.0/lib/rails/commands/commands_tasks.rb:85:in `tap'
/home/rusty/.rvm/gems/ruby-2.3.0/gems/railties-5.0.0/lib/rails/commands/commands_tasks.rb:85:in `server'
/home/rusty/.rvm/gems/ruby-2.3.0/gems/railties-5.0.0/lib/rails/commands/commands_tasks.rb:49:in `run_command!'
/home/rusty/.rvm/gems/ruby-2.3.0/gems/railties-5.0.0/lib/rails/commands.rb:18:in `<top (required)>'
/home/rusty/Maple/bin/rails:9:in `require'
/home/rusty/Maple/bin/rails:9:in `<top (required)>'
/home/rusty/.rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/client/rails.rb:28:in `load'
/home/rusty/.rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/client/rails.rb:28:in `call'
/home/rusty/.rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/client/command.rb:7:in `call'
/home/rusty/.rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/client.rb:30:in `run'
/home/rusty/.rvm/gems/ruby-2.3.0/gems/spring-1.7.2/bin/spring:49:in `<top (required)>'
/home/rusty/.rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/binstub.rb:11:in `load'
/home/rusty/.rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/binstub.rb:11:in `<top (required)>'
/home/rusty/Maple/bin/spring:13:in `require'
/home/rusty/Maple/bin/spring:13:in `<top (required)>'
bin/rails:3:in `load'
bin/rails:3:in `<main>'
Bundler Error Backtrace:
    from /home/rusty/.rvm/gems/ruby-2.3.0/gems/bundler-1.12.5/lib/bundler/runtime.rb:85:in `block (2 levels) in require'
    from /home/rusty/.rvm/gems/ruby-2.3.0/gems/bundler-1.12.5/lib/bundler/runtime.rb:81:in `each'
    from /home/rusty/.rvm/gems/ruby-2.3.0/gems/bundler-1.12.5/lib/bundler/runtime.rb:81:in `block in require'
    from /home/rusty/.rvm/gems/ruby-2.3.0/gems/bundler-1.12.5/lib/bundler/runtime.rb:70:in `each'
    from /home/rusty/.rvm/gems/ruby-2.3.0/gems/bundler-1.12.5/lib/bundler/runtime.rb:70:in `require'
    from /home/rusty/.rvm/gems/ruby-2.3.0/gems/bundler-1.12.5/lib/bundler.rb:102:in `require'
    from /home/rusty/Maple/config/application.rb:7:in `<top (required)>'
    from /home/rusty/.rvm/gems/ruby-2.3.0/gems/railties-5.0.0/lib/rails/commands/commands_tasks.rb:88:in `require'
    from /home/rusty/.rvm/gems/ruby-2.3.0/gems/railties-5.0.0/lib/rails/commands/commands_tasks.rb:88:in `block in server'
    from /home/rusty/.rvm/gems/ruby-2.3.0/gems/railties-5.0.0/lib/rails/commands/commands_tasks.rb:85:in `tap'
    from /home/rusty/.rvm/gems/ruby-2.3.0/gems/railties-5.0.0/lib/rails/commands/commands_tasks.rb:85:in `server'
    from /home/rusty/.rvm/gems/ruby-2.3.0/gems/railties-5.0.0/lib/rails/commands/commands_tasks.rb:49:in `run_command!'
    from /home/rusty/.rvm/gems/ruby-2.3.0/gems/railties-5.0.0/lib/rails/commands.rb:18:in `<top (required)>'
    from /home/rusty/Maple/bin/rails:9:in `require'
    from /home/rusty/Maple/bin/rails:9:in `<top (required)>'
    from /home/rusty/.rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/client/rails.rb:28:in `load'
    from /home/rusty/.rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/client/rails.rb:28:in `call'
    from /home/rusty/.rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/client/command.rb:7:in `call'
    from /home/rusty/.rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/client.rb:30:in `run'
    from /home/rusty/.rvm/gems/ruby-2.3.0/gems/spring-1.7.2/bin/spring:49:in `<top (required)>'
    from /home/rusty/.rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/binstub.rb:11:in `load'
    from /home/rusty/.rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/binstub.rb:11:in `<top (required)>'
    from /home/rusty/Maple/bin/spring:13:in `require'
    from /home/rusty/Maple/bin/spring:13:in `<top (required)>'
    from bin/rails:3:in `load'
    from bin/rails:3:in `<main>'

我的应用已成功创建。所有相应的文件都位于我的应用程序的文件夹中。我似乎无法启动rails服务器。

1 个答案:

答案 0 :(得分：0)

我找到了解决方案。打开终端并切换到您应用的目录。例如，键入cd MyApp。

然后在终端中键入gem install therubyracer来安装Rubyracer gem，然后将gem 'therubyracer'添加到gemfile中。

我的rails服务器现在启动。谢谢uDaY帮助我。

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