Heroku/Ruby-on-Rails错误:图像未预编译

Question

我知道Heroku正在运行rake资产:预编译任务:

-----> 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得到这500个错误？

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,但有些图像会......

Answer 1

首先,请确保您也拥有此设置:

config.assets.initialize_on_precompile = false

如果这不起作用,那么在构建slug之前尝试手动运行预编译任务是值得的.我认为这样做有一些细微差别:

RAILS_ENV=production bundle exec rake assets:precompile

最后,它不是一个解决方案,但如果所有其他方法都失败了,那么临时解决方法就是设置

config.assets.compile = true