> "....Redmine instance (which is written in Ruby) and this is real nightmare for me. Each time I've to upgrade, I've to drink a lot day or two in advance...."

> "....Redmine instance (which is written in Ruby) and this is real nightmare for me. Each time I've to upgrade, I've to drink a lot day or two in advance...." Well that is your problem right there - don't drink in advance, drink afterwards to try delete the traumatic experience from your memory!