爲什麼只有在嘗試將應用程序上傳到Heroku時纔會出現ActionView :: Template :: Error？

Question

我的應用程序的工作我的本地服務器上，但是當我把它上傳到Heroku的，我得到一個網頁，上面寫着："We're sorry, but something went wrong."

當我看着Heroku的日誌，我看到一個錯誤行：

ActionView::Template::Error (/app/app/assets/stylesheets/application.css has already been required) 

如果我的應用程序在我的本地環境中正常工作，這是什麼意思？有關如何解決此問題的任何建議？

對於它的價值，我的Gemfile看起來像這樣：

source 'https://rubygems.org' 

gem 'rails', '3.2.8' 
gem 'bootstrap-sass' 
gem 'bcrypt-ruby', '3.0.1' 
gem 'json' 
gem 'ruby-fs-stack' 


group :development, :test do 
    gem 'sqlite3', '1.3.5' 
    gem 'rspec-rails', '2.11.0' 
end 

# Gems used only for assets and not required 
# in production environments by default. 
group :assets do 
    gem 'sass-rails', '3.2.5' 
    gem 'coffee-rails', '3.2.2' 
    gem 'uglifier',  '1.2.3' 
end 

gem 'jquery-rails', '2.0.2' 

group :test do 
    gem 'capybara', '1.1.2' 
    gem 'factory_girl_rails', '4.1.0' 
end 

group :production do 
    gem 'pg', '0.12.2' 
end 

這裏是Heroku的日誌：

2012-12-11T18:10:43+00:00 app[web.1]: Processing by StaticPagesController#home as HTML 
2012-12-11T18:10:43+00:00 app[web.1]: Rendered static_pages/home.html.erb within layouts/application (11.4ms) 
2012-12-11T18:10:43+00:00 app[web.1]: Completed 500 Internal Server Error in 131ms 
2012-12-11T18:10:43+00:00 app[web.1]: 
2012-12-11T18:10:43+00:00 app[web.1]:  9:  
2012-12-11T18:10:43+00:00 app[web.1]:  11: <%= javascript_include_tag "application" %> 
2012-12-11T18:10:43+00:00 app[web.1]: ActionView::Template::Error (/app/app/assets/stylesheets/application.css has already been required): 
2012-12-11T18:10:43+00:00 app[web.1]:  8: <meta name="author" content=""> 
2012-12-11T18:10:43+00:00 app[web.1]:  12: <%= csrf_meta_tags %> 
2012-12-11T18:10:43+00:00 app[web.1]: 
2012-12-11T18:10:43+00:00 app[web.1]: app/views/layouts/application.html.erb:10:in `_app_views_layouts_application_html_erb__2962376498821052289_32805880' 
2012-12-11T18:10:43+00:00 app[web.1]: 
2012-12-11T18:10:43+00:00 app[web.1]:  7: <meta name="description" content=""> 
2012-12-11T18:10:43+00:00 app[web.1]:  13: <%= render 'layouts/shim' %> 
2012-12-11T18:10:43+00:00 app[web.1]:  10: <%= stylesheet_link_tag "application", :media => "all" %> 
2012-12-11T18:10:43+00:00 heroku[router]: at=info method=GET path=/ host=obscure-mesa-7065.herokuapp.com fwd=75.165.254.103 dyno=web.1 queue=0 wait=1ms connect=4ms service=257ms status=500 bytes=643 

Answer 1

我不知道爲什麼它工作在本地主機上，但似乎你有一個循環依賴。

轉到app/assets/stylesheets，並檢查application.css.scss的頭文件，然後檢查它所需的所有文件的頭文件，以確保它們都不引用application.css.scss。