由於'uglifier'，無法啓動Ruby on Rails Web應用程序

Question

嘗試加載gem'uglifier'時發生錯誤。

Gem Load Error is: wrong argument type Class (expected Module) 
Backtrace for gem load error is: 

/usr/local/lib/ruby/gems/2.4.0/gems/therubyracer-0.12.2/lib/v8/conversion.rb:23:in `include' 
/usr/local/lib/ruby/gems/2.4.0/gems/therubyracer-0.12.2/lib/v8/conversion.rb:23:in `block (2 levels) in <top (required)>' 
/usr/local/lib/ruby/gems/2.4.0/gems/therubyracer-0.12.2/lib/v8/conversion.rb:22:in `class_eval' 
/usr/local/lib/ruby/gems/2.4.0/gems/therubyracer-0.12.2/lib/v8/conversion.rb:22:in `block in <top (required)>' 
/usr/local/lib/ruby/gems/2.4.0/gems/therubyracer-0.12.2/lib/v8/conversion.rb:21:in `each' 
/usr/local/lib/ruby/gems/2.4.0/gems/therubyracer-0.12.2/lib/v8/conversion.rb:21:in `<top (required)>' 
/usr/local/lib/ruby/gems/2.4.0/gems/therubyracer-0.12.2/lib/v8.rb:22:in `require' 
/usr/local/lib/ruby/gems/2.4.0/gems/therubyracer-0.12.2/lib/v8.rb:22:in `<top (required)>' 
/usr/local/lib/ruby/gems/2.4.0/gems/execjs-2.7.0/lib/execjs/ruby_racer_runtime.rb:108:in `require' 
/usr/local/lib/ruby/gems/2.4.0/gems/execjs-2.7.0/lib/execjs/ruby_racer_runtime.rb:108:in `available?' 
/usr/local/lib/ruby/gems/2.4.0/gems/execjs-2.7.0/lib/execjs/runtimes.rb:63:in `each' 
/usr/local/lib/ruby/gems/2.4.0/gems/execjs-2.7.0/lib/execjs/runtimes.rb:63:in `find' 
/usr/local/lib/ruby/gems/2.4.0/gems/execjs-2.7.0/lib/execjs/runtimes.rb:63:in `best_available' 
/usr/local/lib/ruby/gems/2.4.0/gems/execjs-2.7.0/lib/execjs/runtimes.rb:57:in `autodetect' 
/usr/local/lib/ruby/gems/2.4.0/gems/execjs-2.7.0/lib/execjs.rb:5:in `<module:ExecJS>' 
/usr/local/lib/ruby/gems/2.4.0/gems/execjs-2.7.0/lib/execjs.rb:4:in `<top (required)>' 
/usr/local/lib/ruby/gems/2.4.0/gems/uglifier-3.0.4/lib/uglifier.rb:5:in `require' 
/usr/local/lib/ruby/gems/2.4.0/gems/uglifier-3.0.4/lib/uglifier.rb:5:in `<top (required)>' 
/usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.13.7/lib/bundler/runtime.rb:91:in `require' 
/usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.13.7/lib/bundler/runtime.rb:91:in `block (2 levels) in require' 
/usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.13.7/lib/bundler/runtime.rb:86:in `each' 
/usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.13.7/lib/bundler/runtime.rb:86:in `block in require' 
/usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.13.7/lib/bundler/runtime.rb:75:in `each' 
/usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.13.7/lib/bundler/runtime.rb:75:in `require' 
/usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.13.7/lib/bundler.rb:106:in `require' 
/var/www/geia.junyuzhu.com/public_html/testapp/config/application.rb:7:in `<top (required)>' 
/var/www/geia.junyuzhu.com/public_html/testapp/config/environment.rb:2:in `require_relative' 
/var/www/geia.junyuzhu.com/public_html/testapp/config/environment.rb:2:in `<top (required)>' 
config.ru:3:in `require_relative' 
config.ru:3:in `block in <main>' 
/usr/local/lib/ruby/gems/2.4.0/gems/rack-2.0.1/lib/rack/builder.rb:55:in `instance_eval' 
/usr/local/lib/ruby/gems/2.4.0/gems/rack-2.0.1/lib/rack/builder.rb:55:in `initialize' 
config.ru:1:in `new' 
config.ru:1:in `<main>' 
/usr/share/passenger/helper-scripts/rack-preloader.rb:110:in `eval' 
/usr/share/passenger/helper-scripts/rack-preloader.rb:110:in `preload_app' 
/usr/share/passenger/helper-scripts/rack-preloader.rb:156:in `<module:App>' 
/usr/share/passenger/helper-scripts/rack-preloader.rb:30:in `<module:PhusionPassenger>' 
/usr/share/passenger/helper-scripts/rack-preloader.rb:29:in `<main>' 
Bundler Error Backtrace: 
(Bundler::GemRequireError) 
    /usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.13.7/lib/bundler/runtime.rb:94:in `rescue in block (2 levels) in require' 
    /usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.13.7/lib/bundler/runtime.rb:90:in `block (2 levels) in require' 
    /usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.13.7/lib/bundler/runtime.rb:86:in `each' 
    /usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.13.7/lib/bundler/runtime.rb:86:in `block in require' 
    /usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.13.7/lib/bundler/runtime.rb:75:in `each' 
    /usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.13.7/lib/bundler/runtime.rb:75:in `require' 
    /usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.13.7/lib/bundler.rb:106:in `require' 
    /var/www/geia.junyuzhu.com/public_html/testapp/config/application.rb:7:in `<top (required)>' 
    /var/www/geia.junyuzhu.com/public_html/testapp/config/environment.rb:2:in `require_relative' 
    /var/www/geia.junyuzhu.com/public_html/testapp/config/environment.rb:2:in `<top (required)>' 
    config.ru:3:in `require_relative' 
    config.ru:3:in `block in <main>' 
    /usr/local/lib/ruby/gems/2.4.0/gems/rack-2.0.1/lib/rack/builder.rb:55:in `instance_eval' 
    /usr/local/lib/ruby/gems/2.4.0/gems/rack-2.0.1/lib/rack/builder.rb:55:in `initialize' 
    config.ru:1:in `new' 
    config.ru:1:in `<main>' 
    /usr/share/passenger/helper-scripts/rack-preloader.rb:110:in `eval' 
    /usr/share/passenger/helper-scripts/rack-preloader.rb:110:in `preload_app' 
    /usr/share/passenger/helper-scripts/rack-preloader.rb:156:in `<module:App>' 
    /usr/share/passenger/helper-scripts/rack-preloader.rb:30:in `<module:PhusionPassenger>' 
    /usr/share/passenger/helper-scripts/rack-preloader.rb:29:in `<main>' 

我試過安裝nodejs並重新啓動apache服務器。這對這個問題沒有幫助。

bundle show uglifier給

/usr/local/lib/ruby/gems/2.4.0/gems/uglifier-3.0.4 

我以爲我已經uglifier正確安裝。

另外gem 'therubyracer', platforms: :ruby在Gemfile中沒有註釋。

請幫忙，我不知道如何解決這個問題。

Answer 1

這是a known issue與therubyracer和紅寶石2.4。在Ruby 2.4兼容性方面還有一些額外的問題，它們在問題跟蹤器https://github.com/cowboyd/therubyracer/issues/430中跟蹤。

您應該使用早期版本的Ruby，例如2.3.3直到發佈新版本的therubyracer。

順便說一句：有幾個gem與Ruby 2.4不兼容。爲了避免在新版本發佈後遇到大量兼容性問題，在發佈的第一天不進行升級可能是明智之舉

Answer 2

在默認導軌Gemfile中，gem therubyracer的行被註釋掉。如果你取消註釋，你會得到那個寶石，它應該工作。 （解決了我的問題）繼讚揚

OR

運行

sudo apt-get install nodejs 

Uglifier是JS的包裝，它需要一個JS運行時中運行或JS解釋