Ruby on rails Rails 4/Ruby 2.0在执行rspec:install时出错_Ruby On Rails_Ruby_Rspec_Execjs

Ruby on rails Rails 4/Ruby 2.0在执行rspec:install时出错

ruby-on-rails ruby rspec

Ruby on rails Rails 4/Ruby 2.0在执行rspec:install时出错,ruby-on-rails,ruby,rspec,execjs,Ruby On Rails,Ruby,Rspec,Execjs,我正在网上学习RubyonRails4教程。我执行了命令railsgenerate-rspec:install，得到了这个结果 rails生成rspec:install /home/arman/.rvm/gems/ruby-2.0.0-p247/gems/execjs-2.0.1/lib/execjs/runtimes.rb:51:in `autodetect': Could not find a JavaScript runtime. See https://github.com/ssteph

我正在网上学习RubyonRails4教程。我执行了命令

railsgenerate-rspec:install

，得到了这个结果

rails生成rspec:install

/home/arman/.rvm/gems/ruby-2.0.0-p247/gems/execjs-2.0.1/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/arman/.rvm/gems/ruby-2.0.0-p247/gems/execjs-2.0.1/lib/execjs.rb:5:in `<module:ExecJS>'
    from /home/arman/.rvm/gems/ruby-2.0.0-p247/gems/execjs-2.0.1/lib/execjs.rb:4:in `<top (required)>'
    from /home/arman/.rvm/gems/ruby-2.0.0-p247/gems/uglifier-2.1.1/lib/uglifier.rb:3:in `require'
    from /home/arman/.rvm/gems/ruby-2.0.0-p247/gems/uglifier-2.1.1/lib/uglifier.rb:3:in `<top (required)>'
    from /home/arman/.rvm/gems/ruby-2.0.0-p247@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:72:in `require'
    from /home/arman/.rvm/gems/ruby-2.0.0-p247@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:72:in `block (2 levels) in require'
    from /home/arman/.rvm/gems/ruby-2.0.0-p247@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:70:in `each'
    from /home/arman/.rvm/gems/ruby-2.0.0-p247@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:70:in `block in require'
    from /home/arman/.rvm/gems/ruby-2.0.0-p247@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:59:in `each'
    from /home/arman/.rvm/gems/ruby-2.0.0-p247@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:59:in `require'
    from /home/arman/.rvm/gems/ruby-2.0.0-p247@global/gems/bundler-1.3.5/lib/bundler.rb:132:in `require'
    from /home/arman/rails_projects/sample_app/config/application.rb:12:in `<top (required)>'
    from /home/arman/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/commands.rb:44:in `require'
    from /home/arman/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/commands.rb:44:in `<top (required)>'
    from bin/rails:4:in `require'
    from bin/rails:4:in `<main>'

/home/arman/.rvm/gems/ruby-2.0.0-p247/gems/execjs-2.0.1/lib/execjs/runtimes.rb:51:在“自动检测”中：找不到JavaScript运行时。看见https://github.com/sstephenson/execjs 获取可用运行时的列表。（ExecJS:：RuntimeUnavailable）
from/home/arman/.rvm/gems/ruby-2.0.0-p247/gems/execjs-2.0.1/lib/execjs.rb:5:in`'
from/home/arman/.rvm/gems/ruby-2.0.0-p247/gems/execjs-2.0.1/lib/execjs.rb:4:in`'
from/home/arman/.rvm/gems/ruby-2.0.0-p247/gems/uglifier-2.1.1/lib/uglifier.rb:3:in'require'
from/home/arman/.rvm/gems/ruby-2.0.0-p247/gems/uglifier-2.1.1/lib/uglifier.rb:3:in`'
from/home/arman/.rvm/gems/ruby-2.0.0-p247@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:72:in'require'
from/home/arman/.rvm/gems/ruby-2.0.0-p247@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:72:in'block（2层）in require'
from/home/arman/.rvm/gems/ruby-2.0.0-p247@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:70:in'each'
from/home/arman/.rvm/gems/ruby-2.0.0-p247@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:70:in'block in require'
from/home/arman/.rvm/gems/ruby-2.0.0-p247@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:59:in'each'
from/home/arman/.rvm/gems/ruby-2.0.0-p247@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:59:in'require'
from/home/arman/.rvm/gems/ruby-2.0.0-p247@global/gems/bundler-1.3.5/lib/bundler.rb:132:in'require'
from/home/arman/rails\u projects/sample\u app/config/application.rb:12:in`'
from/home/arman/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/commands.rb:44:in'require'
from/home/arman/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/commands.rb:44:in`'
从箱子/轨道：4:in“require”
从箱子/轨道：4:in`'

我不知道怎么解决这个问题

操作系统：Virtualbox上的Linux Mint 15 Ruby 2.0

Rails 4.0

让我们看看您在输出中得到了什么

找不到JavaScript运行时。有关可用运行时的列表，请参阅

嗯，听起来很有趣。让我们关注这个链接

ExecJS支持以下运行时：

-谷歌V8 嵌入Ruby中
-Mozilla 嵌入JRuby中的Rhino
Apple JavaScriptCore-随Mac OS X提供
（JScript）

我认为您应该安装其中一个。

您缺少javascript运行时，请参阅，或者只是运行

gem安装therubyracer

我正在安装therubyracer。它现在正在构建extensionOk，如果有任何问题，请告诉我们。我没有注意到在教程中提到可能缺少js运行时。并且有修复问题的链接。谢谢！安装nodejs解决了这个问题，我想同时安装rubyracer和nodejs有点过分了。其中一个应该足够了。