There's nothing wrong with Django's MySQL-driver, and RoR might be the easiest thing in the world to deploy with Heroku. It seems to me you should read up a bit

There's nothing wrong with Django's MySQL-driver, and RoR might be the easiest thing in the world to deploy with Heroku. It seems to me you should read up a bit on both, try them both out, and rely a bit less on rumor and hearsay. In reality they are both great choices for many types of web apps, but which one is right for you depends on a lot of different factors. Find out which one you like to work with the most, and you probably have your answer.