我是Rails开发的新手，这是我第一次部署到Heroku。 当我执行我的应用程序（部署后）时出现错误：
2011-09-18T21:05:54+00:00 app[web.1]: Completed 500 Internal Server Error in 10ms
2011-09-18T21:05:54+00:00 app[web.1]:
2011-09-18T21:05:54+00:00 app[web.1]: ActionView::Template::Error (application.css isn't precompiled):
我用Google搜索了一下，发现我必须预编译我的资产，但在尝试这样做时我发现了另一个错误：
$ bundle exec rake assets:precompile RAILS_ENV=production
rake aborted!
No such process - /usr/lib/ruby/gems/1.8/gems/pg-0.11.0/lib/pg_ext.so
(See full trace by running task with --trace)
我还没有找到解决此问题的方法。是否有人知道如何解决这个问题？
答案 0 :(得分：35)
我也遇到了这个问题，我通过以下方式解决了这个问题：
打开config/environments/production.rb并确保将以下选项设置为true：
# Don't fallback to assets pipeline if a precompiled asset is missed
config.assets.compile = true
然后运行：
rake assets:precompile --trace RAILS_ENV=production
希望这有帮助！
〜凯文
答案 1 :(得分：6)
我也遇到了问题。但你可以
rake assets:precompile RAILS_ENV=production
在本地，并使用公共/资产推送到heroku。它已经解决了。
答案 2 :(得分：3)
我建议使用新的Cedar stack。它在部署时为您预编译资产，并且使用Rails 3.1整体播放效果更好，尽管您需要配置您的应用程序一些工作：向您的Gemfile添加一些宝石并创建一个Procfile。但它仍然是一种更容易的方式。
答案 3 :(得分：2)
我有同样的错误消息。我的问题是错误指定的字体网址。
这个答案的大部分内容都说明了我是如何理解的。
虽然我没有得到资产的路径但是在运行时失败了
RAILS_ENV=production SECRET_KEY_BASE=xxx rake assets:precompile --trace
相反，我有这个堆栈跟踪：
** Invoke assets:precompile (first_time)
** Invoke assets:environment (first_time)
** Execute assets:environment
** Invoke environment (first_time)
** Execute environment
** Execute assets:precompile
rake aborted!
NoMethodError: undefined method `[]' for nil:NilClass
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/sass_processor.rb:283:in `sprockets_context'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/sass_processor.rb:124:in `asset_path'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/sass_processor.rb:142:in `asset_url'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/sass_processor.rb:214:in `font_url'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/script/tree/funcall.rb:143:in `_perform'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/script/tree/node.rb:58:in `perform'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/script/tree/list_literal.rb:63:in `block in _perform'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/script/tree/list_literal.rb:63:in `map'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/script/tree/list_literal.rb:63:in `_perform'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/script/tree/node.rb:58:in `perform'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/tree/visitors/perform.rb:397:in `visit_prop'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/tree/visitors/base.rb:36:in `visit'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/tree/visitors/perform.rb:160:in `block in visit'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/stack.rb:79:in `block in with_base'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/stack.rb:115:in `with_frame'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/stack.rb:79:in `with_base'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/tree/visitors/perform.rb:160:in `visit'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/tree/visitors/perform.rb:433:in `block (2 levels) in visit_rule'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/tree/visitors/perform.rb:433:in `map'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/tree/visitors/perform.rb:433:in `block in visit_rule'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/tree/visitors/perform.rb:181:in `with_environment'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/tree/visitors/perform.rb:431:in `visit_rule'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/tree/visitors/base.rb:36:in `visit'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/tree/visitors/perform.rb:160:in `block in visit'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/stack.rb:79:in `block in with_base'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/stack.rb:115:in `with_frame'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/stack.rb:79:in `with_base'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/tree/visitors/perform.rb:160:in `visit'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/tree/visitors/base.rb:52:in `block in visit_children'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/tree/visitors/base.rb:52:in `map'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/tree/visitors/base.rb:52:in `visit_children'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/tree/visitors/perform.rb:169:in `block in visit_children'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/tree/visitors/perform.rb:181:in `with_environment'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/tree/visitors/perform.rb:168:in `visit_children'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/tree/visitors/base.rb:36:in `block in visit'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/tree/visitors/perform.rb:188:in `visit_root'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/tree/visitors/base.rb:36:in `visit'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/tree/visitors/perform.rb:159:in `visit'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/tree/visitors/perform.rb:8:in `visit'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/tree/root_node.rb:36:in `css_tree'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/tree/root_node.rb:20:in `render'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sass-3.4.22/lib/sass/engine.rb:281:in `render'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/sass_compressor.rb:48:in `call'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/sass_compressor.rb:28:in `call'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/processor_utils.rb:75:in `call_processor'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/processor_utils.rb:57:in `block in call_processors'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/processor_utils.rb:56:in `reverse_each'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/processor_utils.rb:56:in `call_processors'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/loader.rb:134:in `load_from_unloaded'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/loader.rb:60:in `block in load'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/loader.rb:317:in `fetch_asset_from_dependency_cache'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/loader.rb:44:in `load'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/cached_environment.rb:20:in `block in initialize'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/cached_environment.rb:47:in `load'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/base.rb:66:in `find_asset'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/base.rb:73:in `find_all_linked_assets'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/manifest.rb:142:in `block in find'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/legacy.rb:114:in `block (2 levels) in logical_paths'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/path_utils.rb:228:in `block in stat_tree'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/path_utils.rb:212:in `block in stat_directory'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/path_utils.rb:209:in `each'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/path_utils.rb:209:in `stat_directory'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/path_utils.rb:227:in `stat_tree'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/legacy.rb:105:in `each'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/legacy.rb:105:in `block in logical_paths'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/legacy.rb:104:in `each'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/legacy.rb:104:in `logical_paths'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/manifest.rb:140:in `find'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/manifest.rb:185:in `compile'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-rails-3.1.1/lib/sprockets/rails/task.rb:68:in `block (3 levels) in define'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/rake/sprocketstask.rb:147:in `with_logger'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-rails-3.1.1/lib/sprockets/rails/task.rb:67:in `block (2 levels) in define'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/rake-11.2.2/lib/rake/task.rb:248:in `block in execute'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/rake-11.2.2/lib/rake/task.rb:243:in `each'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/rake-11.2.2/lib/rake/task.rb:243:in `execute'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/rake-11.2.2/lib/rake/task.rb:187:in `block in invoke_with_call_chain'
/Users/smithd98/.rvm/rubies/ruby-2.3.1/lib/ruby/2.3.0/monitor.rb:214:in `mon_synchronize'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/rake-11.2.2/lib/rake/task.rb:180:in `invoke_with_call_chain'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/rake-11.2.2/lib/rake/task.rb:173:in `invoke'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/rake-11.2.2/lib/rake/application.rb:152:in `invoke_task'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/rake-11.2.2/lib/rake/application.rb:108:in `block (2 levels) in top_level'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/rake-11.2.2/lib/rake/application.rb:108:in `each'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/rake-11.2.2/lib/rake/application.rb:108:in `block in top_level'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/rake-11.2.2/lib/rake/application.rb:117:in `run_with_threads'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/rake-11.2.2/lib/rake/application.rb:102:in `top_level'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/rake-11.2.2/lib/rake/application.rb:80:in `block in run'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/rake-11.2.2/lib/rake/application.rb:178:in `standard_exception_handling'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/rake-11.2.2/lib/rake/application.rb:77:in `run'
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/rake-11.2.2/exe/rake:27:in `<top (required)>'
/Users/smithd98/.rvm/gems/ruby-2.3.1/bin/rake:23:in `load'
/Users/smithd98/.rvm/gems/ruby-2.3.1/bin/rake:23:in `<main>'
/Users/smithd98/.rvm/gems/ruby-2.3.1/bin/ruby_executable_hooks:15:in `eval'
/Users/smithd98/.rvm/gems/ruby-2.3.1/bin/ruby_executable_hooks:15:in `<main>'
我修改了gem以吐出文件名
subl /Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/sass_processor.rb:124:in
def asset_path(path, options = {})
path = path.value
puts path
puts '123'
path, _, query, fragment = URI.split(path)[5..8]
puts '126'
path = sprockets_context.asset_path(path, options)
puts '128'
query = "?#{query}" if query
puts '130'
fragment = "##{fragment}" if fragment
puts '132'
Autoload::Sass::Script::String.new("#{path}#{query}#{fragment}", :string)
end
然后我跑了
RAILS_ENV=production SECRET_KEY_BASE=xxx rake assets:precompile --trace
我得到了
** Invoke assets:precompile (first_time)
** Invoke assets:environment (first_time)
** Execute assets:environment
** Invoke environment (first_time)
** Execute environment
** Execute assets:precompile
fonts/OpenSans-Light.ttf
123
126
rake aborted!
NoMethodError: undefined method `[]' for nil:NilClass
/Users/smithd98/.rvm/gems/ruby-2.3.1/gems/sprockets-3.7.0/lib/sprockets/sass_processor.rb:283:in `sprockets_context'
...the rest of the stack trace is the same...
然后我发现问题是这样指定的字体：
.btn-rect {
font-family: 'OpenSans-Light';
src:font-url('fonts/OpenSans-Light.ttf') format('truetype');
}
应该是这样的：
.btn-rect {
font-family: 'OpenSans-Light';
}
答案 4 :(得分：1)
哦，这很简单。你的PG宝石破坏了你的佣金任务。您可以选择漫长的路径来尝试修复它，也可以尝试从gemfile中注释掉它以运行预编译。
答案 5 :(得分：1)
是的，像Simpleton上面发布的PG gem正在引发问题。 Imo更好的解决方案是将PG gem放在gemfile中生成并运行; 捆绑安装 - 没有生产 然后你应该能够毫无问题地运行rake任务
答案 6 :(得分：0)
而不是config.assets.compile = true使用config.serve_static_assets = true
第一个选项不正确，因为它告诉您的服务器返回提供app / assets文件夹。