我知道 Heroku 正在运行 rake assets:precompile 任务:
-----> Writing config/database.yml to read from DATABASE_URL
-----> Preparing app for Rails asset pipeline
Running: rake assets:precompile
-----> Rails plugin injection
Injecting rails_log_stdout
Injecting rails3_serve_static_assets
-----> Discovering process types
Procfile declares types -> (none)
Default types for Ruby/Rails -> console, rake, web, worker
-----> Compiled slug size is 17.7MB
-----> Launching... done
我告诉它在 production.rb 中预编译图像
# from: http://stackoverflow.com/questions/8052865/rails-3-1-asset-pipeline-why-my-images-do-not-precompile-for-production
config.assets.precompile += %w[*.png *.jpg *.jpeg *.gif]
那么为什么我仍然会收到这个 500 错误?
2012-05-29T02:57:15+00:00 app[web.1]: Started GET "/signin" for 46.114.68.16 at 2012-05-29 02:57:15 +0000
2012-05-29T02:57:15+00:00 app[web.1]: Processing by SessionsController#new as HTML
2012-05-29T02:57:15+00:00 app[web.1]: Rendered sessions/new.html.erb within layouts/application (25.4ms)
2012-05-29T02:57:15+00:00 app[web.1]: Completed 500 Internal Server Error in 27ms
2012-05-29T02:57:15+00:00 app[web.1]:
2012-05-29T02:57:15+00:00 app[web.1]: ActionView::Template::Error (twitter_64.png isn't precompiled):
2012-05-29T02:57:15+00:00 app[web.1]: 25: <div id="auths">
2012-05-29T02:57:15+00:00 app[web.1]: 27: <a href="/auth/twitter" class="provider">
2012-05-29T02:57:15+00:00 app[web.1]: 26: <h2>Or sign in through one of these:</h2>
2012-05-29T02:57:15+00:00 app[web.1]: 28: <%= image_tag "twitter_64.png", :size => "64x64", :alt => "Twitter" %>Twitter</a>
有趣的是,我在其他页面上的图像显示得很好。不知道为什么有些图像不起作用,但有些会...