Ruby on Rails Rake assets:precompile error

Question

I'm new in Rails development and this is my first deployment to Heroku. When I execute my application (after the deployment) there is an error:

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):

I googled this and found that I have to precompile my assets, but when trying to do this I found an other error:

$ 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)

I haven't found any solution for this issue. Is there anyone who faced this an know how to solve this problem?

Answer 1

I ran into this issue as well and I resolved it by doing the following:

Open up config/environments/production.rb and make sure the following option is set to true:

# Don't fallback to assets pipeline if a precompiled asset is missed
config.assets.compile = true

Then run:

rake assets:precompile --trace RAILS_ENV=production

Hope this helps!

~Kevin

Answer 2

I got the problem too. But you can

rake assets:precompile RAILS_ENV=production

in local, and push to heroku with public/assets. It's resolved.

Answer 3

I would recommend to use the new Cedar stack. It precompiles assets for you on deploy and overall plays nicer with Rails 3.1, although you will need to configure your app a little bit to work: add some gems to your Gemfile and create a Procfile. But it is still an easier way to go.