Ruby on Rails is a popular web application framework that is constantly evolving with new versions being released frequently. While upgrading to a newer Rails version can bring new features, better performance, and security patches/improvements, it can also be a challenging task.

What are the most common mistakes we have found while investing tens of thousands of hours upgrading our clients Ruby and Rails applications?

In this blog post, we will discuss 7 common mistakes made while doing Rails upgrades and how to avoid them.