rake預編譯資產在rake資產時失敗：預編譯 - 基本上是空的application.js

Question

運行：

bundle exec rake assets:precompile RAILS_ENV=production --trace

** Execute assets:precompile:primary
rake aborted!
TypeError: Object doesn't support this property or method
  (in C:/Sites/MyApp/app/assets/javascripts/application.js)

以下是application.js的全部內容：

//= require jquery
//= require jquery_ujs
//= require_tree .

沒有別的。

我試圖從application.js刪除三個//= require行，然后預編譯運行沒有問題。

Answer 1

看起來它可能是uglifier和Windows Script Host的問題：

https://github.com/rails/rails/issues/2847

確保您使用的是最新版本的uglifier（1.0.4）。 如果你還有問題，我建議嘗試不同的編譯器（例如Closure編譯器）

在Gemfile ：

gem 'closure-compiler'

在config/environments/production.rb

config.assets.js_compressor = :closure

或者完全禁用JS壓縮：

config.assets.compress = false

Answer 2

我有同樣的錯誤

...>rake assets:precompile
C:/Ruby192/bin/ruby.exe C:/Ruby192/bin/rake assets:precompile:all RAILS_ENV=production RAILS_GROUPS=assets
...
rake aborted!
TypeError: Object doesn't support this property or method
  (in C:/Users/straffordw/railsApps/chorus-spp/app/assets/javascripts/application.js)
C:/Ruby192/lib/ruby/gems/1.9.1/gems/execjs-1.4.0/lib/execjs/external_runtime.rb:68:in `extract_result'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/execjs-1.4.0/lib/execjs/external_runtime.rb:28:in `block in exec'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/execjs-1.4.0/lib/execjs/external_runtime.rb:41:in `compile_to_tempfile'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/execjs-1.4.0/lib/execjs/external_runtime.rb:27:in `exec'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/uglifier-2.0.1/lib/uglifier.rb:167:in `really_compile'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/uglifier-2.0.1/lib/uglifier.rb:95:in `compile'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/actionpack-3.2.11/lib/sprockets/compressors.rb:74:in `compress'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/sprockets-2.2.2/lib/sprockets/processing.rb:265:in `block in js_compressor='
...

並做到了

bundle update

引進來的

uglifier (2.1.1)

（除其他外），然后：

rake assets:precompile

這解決了我的問題。 Windows，Rails 3.2.11。