在生产模式下访问资产文件的一些问题

Question

我正在使用Ruby on Rails 4.1.1，在我的本地计算机上，我有以下图像：

# Directory: MyApp/app/assets/images/
logo.png

我使用Capistrano gem上传了MyApp，并且一切似乎都按预期工作。 但是，当我尝试通过浏览器通过以下URL访问我的网站时

1) http://www.myapp.org/logo.png
2) http://www.myapp.org/assets/logo.png
3) http://www.myapp.org/images/logo.png
4) http://www.myapp.org/assets/images/logo.png

然后我得到一个错误页面：

The page you were looking for doesn't exist.
You may have mistyped the address or the page may have moved.

在日志文件中，我得到：

1) ActionController::RoutingError (No route matches [GET] "/logo.png"):
2) ActionController::RoutingError (No route matches [GET] "/assets/logo.png"):
3) ActionController::RoutingError (No route matches [GET] "/images/logo.png"):
4) ActionController::RoutingError (No route matches [GET] "/assets/images/logo.png"):

  actionpack (4.1.1) lib/action_dispatch/middleware/debug_exceptions.rb:21:in `call'
  actionpack (4.1.1) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
  railties (4.1.1) lib/rails/rack/logger.rb:38:in `call_app'
  railties (4.1.1) lib/rails/rack/logger.rb:20:in `block in call'
  activesupport (4.1.1) lib/active_support/tagged_logging.rb:68:in `block in tagged'
  activesupport (4.1.1) lib/active_support/tagged_logging.rb:26:in `tagged'
  activesupport (4.1.1) lib/active_support/tagged_logging.rb:68:in `tagged'
  railties (4.1.1) lib/rails/rack/logger.rb:20:in `call'
  actionpack (4.1.1) lib/action_dispatch/middleware/request_id.rb:21:in `call'
  rack (1.5.2) lib/rack/methodoverride.rb:21:in `call'
  rack (1.5.2) lib/rack/runtime.rb:17:in `call'
  activesupport (4.1.1) lib/active_support/cache/strategy/local_cache_middleware.rb:26:in `call'
  rack (1.5.2) lib/rack/sendfile.rb:112:in `call'
  railties (4.1.1) lib/rails/engine.rb:514:in `call'
  railties (4.1.1) lib/rails/application.rb:144:in `call'
  railties (4.1.1) lib/rails/railtie.rb:194:in `public_send'
  railties (4.1.1) lib/rails/railtie.rb:194:in `method_missing'
  /usr/local/rvm/gems/ruby-2.1.1/gems/passenger-4.0.45/lib/phusion_passenger/rack/thread_handler_extension.rb:74:in `process_request'
  /usr/local/rvm/gems/ruby-2.1.1/gems/passenger-4.0.45/lib/phusion_passenger/request_handler/thread_handler.rb:141:in `accept_and_process_next_request'
  /usr/local/rvm/gems/ruby-2.1.1/gems/passenger-4.0.45/lib/phusion_passenger/request_handler/thread_handler.rb:109:in `main_loop'
  /usr/local/rvm/gems/ruby-2.1.1/gems/passenger-4.0.45/lib/phusion_passenger/request_handler.rb:448:in `block (3 levels) in start_threads'

有什么问题，我该如何解决？

---

• 在我的本地计算机上（开发模式），我没有问题。
• 我的远程计算机运行Ubuntu 12.04 LTS，Phusion Passenger 4.0.45，Apache 2.2.22。

Answer 1

在Production中编译的所有资产都在文件名后附加了一个指纹ID。 因此，在生产中，logo.png在技术上不再存在。 现在应该存在徽标-SOME_FINGERPRINT_ID.png。 在此处查看更多信息：

http://guides.rubyonrails.org/asset_pipeline.html#what-is-fingerprinting-and-why-should-i-care-questionmark

另外，如果您只想提供静态图片，则需要将其放在公用文件夹的图片目录中。 然后，您需要告诉Apache或Nginx从该位置提供静态资产。

编辑：链接到资产管道中的图像-

link_to(LINK_TEXT_OR_IMAGE_TAG_HELPER, image_path(IMAGE_NAME))

资产网址助手