How can I clear rails cache after deploy to heroku?

Question

I applied cache to my heroku rails app and it works well. But everytime I deploy to heroku, I also want to clear cache automatically.

so I googled and I found this.

task :after_deploy, :env, :branch do |t, args|   puts "Deployment Complete"   puts "Cleaning all cache...."   FileUtils.cd Rails.root do     sh %{heroku run console}     sh %{Rails.cache.clear}   end end 

but when I raked this script, it just show the heroku console command line but the Rails.cache.clear command does not typed. (I guess that is because heroku console is interactive)

and

system "heroku console Rails.cache.clear" 

doesn't work for cedar apps.

How can I solve this problem?

Thanks.

Answer 1

Rails has a built in rake task:

rake tmp:clear 

Answer 2

The following should work on cedar:

heroku run console 

..then wait 5 seconds for heroku console to boot

Rails.cache.clear 

Then you should see the cache clear, and you can quit console. Remember you might have to refresh a few times because your local machine will often cache assets and such in your browser until it makes a fresh request.

If it happens to be assets that you're caching though, you don't need to go through a manual clear every time you push, you just need to have the asset pipeline set up and make sure all your js/css(less/sass)/static images are being compiled with hashes at the end of their filenames.