At FastRuby.io, we offer specialized Rails upgrade, maintenance, and technical debt services.
Before doing an upgrade, we strongly recommend doing the Roadmap to Upgrade Rails, a static analysis of your codebase that outlines the action plan to do the upgrade and provides time and investment estimates.
The first step in every Rails upgrade we do is addressing deprecation warnings in the current version. So recently, we set out to extract all deprecation warnings from all versions of Rails starting at Rails 2.3 to help in our static analysis of Rails applications.
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