【发布时间】：2011-04-20 18:49:27
【问题描述】：
我有一个 Ruby on Rails 应用程序无法正确生成样式表。有时 SASS 不会将 SCSS 编译成 CSS，有时它们连接的 CSS 不会生成。我基本上在写入文件时遇到错误，如下所示：
Error Message:
Errno::EACCES: Permission denied - /var/www/app/releases/20101004114929/public/stylesheets/cached_tutor24_tutor24-dot-ch-dot-simplificator-dot-com.css
Where:
pages#show
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_view/helpers/asset_tag_helper.rb, line 673
Backtrace Summary:
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_view/helpers/asset_tag_helper.rb:673:in `initialize'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_view/helpers/asset_tag_helper.rb:673:in `open'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_view/helpers/asset_tag_helper.rb:673:in `write_asset_file_contents'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_view/helpers/asset_tag_helper.rb:433:in `stylesheet_link_tag'
[PROJECT_ROOT]/app/helpers/application_helper.rb:28:in `robust_stylesheet_link_tag'
[PROJECT_ROOT]/app/views/layouts/application.html.haml:28:in `_run_haml_app47views47layouts47application46html46haml'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_view/renderable.rb:34:in `send'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_view/renderable.rb:34:in `render_without_trace_View_path_r_2_Rendering'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_view/base.rb:306:in `with_template'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_view/renderable.rb:30:in `render_without_trace_View_path_r_2_Rendering'
[GEM_ROOT]/gems/newrelic_rpm-2.13.1/lib/new_relic/agent/method_tracer.rb:319:in `render'
[GEM_ROOT]/gems/newrelic_rpm-2.13.1/lib/new_relic/agent/method_tracer.rb:141:in `trace_execution_scoped'
[GEM_ROOT]/gems/newrelic_rpm-2.13.1/lib/new_relic/agent/method_tracer.rb:314:in `render'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_view/template.rb:205:in `render_template'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_view/base.rb:265:in `render_without_haml'
[GEM_ROOT]/gems/haml-3.0.18/rails/./lib/haml/helpers/action_view_mods.rb:13:in `render'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_view/base.rb:352:in `_render_with_layout'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_view/base.rb:262:in `render_without_haml'
[GEM_ROOT]/gems/haml-3.0.18/rails/./lib/haml/helpers/action_view_mods.rb:13:in `render'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_controller/base.rb:1250:in `render_for_file'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_controller/base.rb:936:in `render_without_benchmark'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_controller/benchmarking.rb:51:in `render'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_controller/benchmarking.rb:51:in `render'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_controller/base.rb:1326:in `default_render'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_controller/base.rb:1332:in `perform_action_without_filters'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_controller/filters.rb:617:in `call_filters'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_controller/filters.rb:610:in `perform_action_without_benchmark'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_controller/rescue.rb:160:in `perform_action_without_flash'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_controller/flash.rb:151:in `perform_action_without_newrelic_trace'
[GEM_ROOT]/gems/newrelic_rpm-2.13.1/lib/new_relic/control/./agent/instrumentation/controller_instrumentation.rb:254:in `perform_action'
[GEM_ROOT]/gems/newrelic_rpm-2.13.1/lib/new_relic/agent/method_tracer.rb:141:in `trace_execution_scoped'
[GEM_ROOT]/gems/newrelic_rpm-2.13.1/lib/new_relic/control/./agent/instrumentation/controller_instrumentation.rb:247:in `perform_action'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_controller/base.rb:532:in `send'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_controller/base.rb:532:in `process_without_filters'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_controller/filters.rb:606:in `process'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_controller/base.rb:391:in `process'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_controller/base.rb:386:in `call'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_controller/routing/route_set.rb:438:in `call'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_controller/dispatcher.rb:87:in `dispatch'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_controller/dispatcher.rb:121:in `_call'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_controller/dispatcher.rb:130:in `build_middleware_stack'
[GEM_ROOT]/gems/haml-3.0.18/rails/./lib/sass/plugin/rack.rb:41:in `call'
[GEM_ROOT]/gems/haml-3.0.18/rails/./lib/sass/plugin/rack.rb:41:in `call'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_controller/string_coercion.rb:25:in `call'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_controller/params_parser.rb:15:in `call'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_controller/session/abstract_store.rb:177:in `call'
[GEM_ROOT]/gems/activerecord-2.3.9/lib/active_record/query_cache.rb:29:in `call'
[GEM_ROOT]/gems/activerecord-2.3.9/lib/active_record/connection_adapters/abstract/query_cache.rb:34:in `cache'
[GEM_ROOT]/gems/activerecord-2.3.9/lib/active_record/query_cache.rb:9:in `cache'
[GEM_ROOT]/gems/activerecord-2.3.9/lib/active_record/query_cache.rb:28:in `call'
[GEM_ROOT]/gems/activerecord-2.3.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:361:in `call'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_controller/failsafe.rb:26:in `call'
[GEM_ROOT]/gems/actionpack-2.3.9/lib/action_controller/dispatcher.rb:106:in `call'
/usr/lib/ruby/gems/1.8/gems/passenger-2.2.15/lib/phusion_passenger/rack/request_handler.rb:92:in `process_request'
/usr/lib/ruby/gems/1.8/gems/passenger-2.2.15/lib/phusion_passenger/abstract_request_handler.rb:207:in `main_loop'
/usr/lib/ruby/gems/1.8/gems/passenger-2.2.15/lib/phusion_passenger/railz/application_spawner.rb:441:in `start_request_handler'
/usr/lib/ruby/gems/1.8/gems/passenger-2.2.15/lib/phusion_passenger/railz/application_spawner.rb:381:in `handle_spawn_application'
/usr/lib/ruby/gems/1.8/gems/passenger-2.2.15/lib/phusion_passenger/utils.rb:252:in `safe_fork'
/usr/lib/ruby/gems/1.8/gems/passenger-2.2.15/lib/phusion_passenger/railz/application_spawner.rb:377:in `handle_spawn_application'
/usr/lib/ruby/gems/1.8/gems/passenger-2.2.15/lib/phusion_passenger/abstract_server.rb:352:in `__send__'
/usr/lib/ruby/gems/1.8/gems/passenger-2.2.15/lib/phusion_passenger/abstract_server.rb:352:in `main_loop'
/usr/lib/ruby/gems/1.8/gems/passenger-2.2.15/lib/phusion_passenger/abstract_server.rb:196:in `start_synchronously'
/usr/lib/ruby/gems/1.8/gems/passenger-2.2.15/lib/phusion_passenger/abstract_server.rb:163:in `start'
/usr/lib/ruby/gems/1.8/gems/passenger-2.2.15/lib/phusion_passenger/railz/application_spawner.rb:222:in `start'
/usr/lib/ruby/gems/1.8/gems/passenger-2.2.15/lib/phusion_passenger/spawn_manager.rb:253:in `spawn_rails_application'
/usr/lib/ruby/gems/1.8/gems/passenger-2.2.15/lib/phusion_passenger/abstract_server_collection.rb:126:in `lookup_or_add'
/usr/lib/ruby/gems/1.8/gems/passenger-2.2.15/lib/phusion_passenger/spawn_manager.rb:247:in `spawn_rails_application'
/usr/lib/ruby/gems/1.8/gems/passenger-2.2.15/lib/phusion_passenger/abstract_server_collection.rb:80:in `synchronize'
/usr/lib/ruby/gems/1.8/gems/passenger-2.2.15/lib/phusion_passenger/abstract_server_collection.rb:79:in `synchronize'
/usr/lib/ruby/gems/1.8/gems/passenger-2.2.15/lib/phusion_passenger/spawn_manager.rb:246:in `spawn_rails_application'
/usr/lib/ruby/gems/1.8/gems/passenger-2.2.15/lib/phusion_passenger/spawn_manager.rb:145:in `spawn_application'
/usr/lib/ruby/gems/1.8/gems/passenger-2.2.15/lib/phusion_passenger/spawn_manager.rb:278:in `handle_spawn_application'
/usr/lib/ruby/gems/1.8/gems/passenger-2.2.15/lib/phusion_passenger/abstract_server.rb:352:in `__send__'
/usr/lib/ruby/gems/1.8/gems/passenger-2.2.15/lib/phusion_passenger/abstract_server.rb:352:in `main_loop'
/usr/lib/ruby/gems/1.8/gems/passenger-2.2.15/lib/phusion_passenger/abstract_server.rb:196:in `start_synchronously'
整个 /var/www/app 被设置为属于 www-data:www-data 权限为 ug+rwX，在部署时执行几次。
即使在部署之后，我也可以去检查权限，它们很好：
# ls -la current/public/stylesheets/
total 92
drwxrwxr-x 2 www-data www-data 4096 Oct 4 14:11 ./
drwxrwxr-x 6 www-data www-data 4096 Oct 4 13:49 ../
它仍然无法创建（或读取文件）。
有什么想法吗？
【问题讨论】：
标签： ruby-on-rails deployment passenger sass