Rails，rake不起作用

Question

我一直在嘗試使用Rails，當我使用rake時，我得到了這個錯誤。 我應該使用哪些運行時間的建議？

ngzhongqin@ngzhongqin-linux:~/RailsProjects/webuiltit$ rake db:create:all --trace
rake aborted!
Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs for a list of available runtimes.
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/execjs-1.2.4/lib/execjs/runtimes.rb:45:in `autodetect'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/execjs-1.2.4/lib/execjs.rb:5:in `<module:ExecJS>'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/execjs-1.2.4/lib/execjs.rb:4:in `<top (required)>'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/coffee-script-2.2.0/lib/coffee_script.rb:1:in `require'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/coffee-script-2.2.0/lib/coffee_script.rb:1:in `<top (required)>'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/coffee-script-2.2.0/lib/coffee-script.rb:1:in `require'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/coffee-script-2.2.0/lib/coffee-script.rb:1:in `<top (required)>'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/coffee-rails-3.1.0/lib/coffee-rails.rb:1:in `require'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/coffee-rails-3.1.0/lib/coffee-rails.rb:1:in `<top (required)>'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/bundler-1.0.18/lib/bundler/runtime.rb:68:in `require'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/bundler-1.0.18/lib/bundler/runtime.rb:68:in `block (2 levels) in require'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/bundler-1.0.18/lib/bundler/runtime.rb:66:in `each'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/bundler-1.0.18/lib/bundler/runtime.rb:66:in `block in require'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/bundler-1.0.18/lib/bundler/runtime.rb:55:in `each'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/bundler-1.0.18/lib/bundler/runtime.rb:55:in `require'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/bundler-1.0.18/lib/bundler.rb:120:in `require'
/home/ngzhongqin/RailsProjects/webuiltit/config/application.rb:13:in `<top (required)>'
/home/ngzhongqin/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
/home/ngzhongqin/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
/home/ngzhongqin/RailsProjects/webuiltit/Rakefile:5:in `<top (required)>'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/rake_module.rb:25:in `load'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/rake_module.rb:25:in `load_rakefile'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/application.rb:495:in `raw_load_rakefile'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/application.rb:78:in `block in load_rakefile'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/application.rb:129:in `standard_exception_handling'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/application.rb:77:in `load_rakefile'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/application.rb:61:in `block in run'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/application.rb:129:in `standard_exception_handling'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/application.rb:59:in `run'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/bin/rake:32:in `<top (required)>'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/bin/rake:19:in `load'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/bin/rake:19:in `<main>'

Answer 1

將其添加到您的Gemfile中

gem 'therubyracer', require: "v8"

並運行

bundle install

Answer 2

我已經安裝了寶石therubyracer，execjs，野馬，但沒有任何工作。

在我的linux（ubuntu）命令上

sudo apt-get install nodejs

最終為我做了這份工作。

也許這篇文章也可以提供幫助： https ： //github.com/intridea/rails_wizard/issues/31

Answer 3

你需要為這些安裝運行時..一些好的選擇是

therubyracer - Google V8 embedded within Ruby

therubyrhino - Mozilla Rhino embedded within JRuby

Johnson - Mozilla SpiderMonkey embedded within Ruby

Mustang - Mustang V8 embedded within Ruby

Node.js

Apple JavaScriptCore - Included with Mac OS X

Mozilla SpiderMonkey

Microsoft Windows Script Host (JScript)

您可以在https://github.com/sstephenson/execjs找到更多詳細信息