blueprint / screen.css没有预编译
我一直沿着迈克尔·哈特（Michael Hartl）出色的RoR教程，但是我正在使用RoR 3.1。 我是RoR 3.1的新手，需要与资产pipe道相关的帮助。 这是我的问题：
在继续5.3节之前，我想我会推动Heroku，看看事情是如何发展的。 令我惊讶的是“GET /”导致错误500.在我的本地开发环境中一切正常。 然后我尝试在生产环境下运行我的本地sample_app（ rails s -e production ）。 同样的结果，错误500：
Sprockets::Helpers::RailsHelper::AssetPaths::AssetNotPrecompiledError in Pages#home Showing /Users/john/Projects/sample_app/app/views/layouts/_stylesheets.html.erb where line #4 raised: blueprint/screen.css isn't precompiled
支持信息：
- 我把蓝图CSS目录下的供应商/资产/样式表。
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我遵循迈克尔的第13.1.4节的build议，并有以下作为我的应用程序/ views / layouts / application.html.erb：
<!DOCTYPE html> <html> <head> <title><%= title %></title> <%= render 'layouts/stylesheets' %> <%= stylesheet_link_tag "application" %> <%= javascript_include_tag "application" %> <%= csrf_meta_tags %> </head> <body> <div class="container"> <%= render 'layouts/header' %> <section class="round"> <%= yield %> </section> <%= render 'layouts/footer' %> </div> </body> </html> -
app / views / layouts / _stylesheets.html.erb的内容：
<!--[if lt IE 9]> <script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script> <![endif]--> <%= stylesheet_link_tag 'blueprint/screen', :media => 'screen' %> <%= stylesheet_link_tag 'blueprint/print', :media => 'print' %> <!--[if lt IE 8]><%= stylesheet_link_tag 'blueprint/ie' %><![endif]--> -
我已经运行了bundle exec rake资源：预编译。
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公共/资产/ manifest.yml的内容：
--- logo.png: logo-8e0a5ad292fbb13a2b07e68fa3995406.png rails.png: rails-bd9ad5a560b5a3a7be0808c5cd76a798.png blueprint/plugins/buttons/icons/cross.png: blueprint/plugins/buttons/icons/cross-2ebcd25368006d1b7b0c5b7d6b523ab3.png blueprint/plugins/buttons/icons/key.png: blueprint/plugins/buttons/icons/key-55237526967cbcab3e8cfb12f0029d88.png blueprint/plugins/buttons/icons/tick.png: blueprint/plugins/buttons/icons/tick-3f5fc1f52b505b93f88263e0432d25ce.png blueprint/plugins/buttons/readme.txt: blueprint/plugins/buttons/readme-3ff7f5dbb0288d71f70682fdbe9d86ec.txt blueprint/plugins/fancy-type/readme.txt: blueprint/plugins/fancy-type/readme-e7ed185d1a9f23256d418ab929b464d9.txt blueprint/plugins/link-icons/icons/doc.png: blueprint/plugins/link-icons/icons/doc-b071fd74b88ff38cda8360a53f493013.png blueprint/plugins/link-icons/icons/email.png: blueprint/plugins/link-icons/icons/email-28104e72b3418737d4b9b329c12ec358.png blueprint/plugins/link-icons/icons/external.png: blueprint/plugins/link-icons/icons/external-ee6d976ddb80125fafe1a33c6f8aed10.png blueprint/plugins/link-icons/icons/feed.png: blueprint/plugins/link-icons/icons/feed-59bc8604661681639d25cb7015a32c38.png blueprint/plugins/link-icons/icons/im.png: blueprint/plugins/link-icons/icons/im-afeeb6e0b652c1edb1441bf0fb428596.png blueprint/plugins/link-icons/icons/lock.png: blueprint/plugins/link-icons/icons/lock-d73c4b3b57ce72cb6dbd8b265507ff75.png blueprint/plugins/link-icons/icons/pdf.png: blueprint/plugins/link-icons/icons/pdf-c4c543e5103a8516839a7846b91e1ac4.png blueprint/plugins/link-icons/icons/visited.png: blueprint/plugins/link-icons/icons/visited-fb2370448bc4ea5d079e963a8c0d900b.png blueprint/plugins/link-icons/icons/xls.png: blueprint/plugins/link-icons/icons/xls-5399729cd31dffc492a04b3805cd0be1.png blueprint/plugins/link-icons/readme.txt: blueprint/plugins/link-icons/readme-42c02030199cd36a671d4b623cb4dc36.txt blueprint/plugins/rtl/readme.txt: blueprint/plugins/rtl/readme-8d11bf76e19fb3fc7dbc6c2ddb54b92d.txt blueprint/src/grid.png: blueprint/src/grid-973add038ed86febca85f03e8b35b94a.png jquery-ui.min.js: jquery-ui-7e33882a28fc84ad0e0e47e46cbf901c.min.js jquery.min.js: jquery-8a50feed8d29566738ad005e19fe1c2d.min.js application.js: application-a552e1db33b8be6a42eedf1261916f3c.js application.css: application-214e0c0742f20b334e8a7776e0a4c71d.css -
我在manifest.yml中看不到blueprint / screen.css。
我错过了什么？
从http://guides.rubyonrails.org/asset_pipeline.html#precompiling-assets
如果您有其他清单或个别样式表和JavaScript文件包含，可以将它们添加到预编译数组中
这意味着在你的config / environments / production.rb中，你设置了
config.assets.precompile += %w( blueprint/screen.css blueprint/print.css )
或一个catchall：
config.assets.precompile += %w( *.css *.js )
我在application.css文件中添加了对蓝图样式表的引用。 这样，我不必更改布局来修改样式表，我只需要修改application.css文件，运行rake assets:precompile ，然后重新启动web服务器（如果webrick或类似的）。
我的application.css目前看起来像这样：
/* * This is a manifest file that'll automatically include all the stylesheets available in this directory * and any sub-directories. You're free to add application-wide styles to this file and they'll appear at * the top of the compiled file, but it's generally better to create a new file per style scope. *= require_self *= require_tree ./blueprint *= require_tree . */
您可能需要按照上述方式预编译您的资产。 如果你使用capistrano，你可以在代码更新后进行：
require 'bundler/capistrano' after 'deploy:update_code' do run "cd #{release_path}; RAILS_ENV=#{rails_env} bundle exec rake assets:precompile" end
从我自己的这个问题的经验来看，在那里我也正在经历Michael Hartl的RoR教程，我认为在这一点上我们可以忽略一步。
bundle exec rake assets:precompile git add public/assets git commit -m "vendor compiled assets" git push heroku
我在这里find了 。
