Normally I’d use carrierwave, but they do not officially support jruby, and I’ve been running in to bugs, possibly related. (https://github.com/jnicklas/carrierwave/issues/620, Image corruption on upload to s3, production only. (carrierwave, engineyard))
Have others had success here?
I’m considering trying out paperclip, but it looks like that may not be perfect either– https://github.com/thoughtbot/paperclip/issues/100
Try dragonfly it’s a really great library to manage you file attachment.