As you know Heroku **does not ** run rake db:migrate automatically. Most of the time we all face this issue of not running migrations on Heroku post deployment. Either we forget or for some reason we miss it. However there are some gems/plugins that help us overcome these issues. Even when we use [heroku auto deployment] [12] feature, there also we need to run rake db:migrate manually and Heroku will not run it automatically for us. That means it is not fully automatic. When I setup heroku auto-deployment I wanted everything to happen automatically, why should I run