12 min
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Rails Concerns: When And How To Use Them
Learn how Rails Concerns work, when to use ActiveSupport::Concern, and when concerns make your Rails app harder to maintain.
Articles By Jean Emmanuel Cadet
Jean Emmanuel is a Full-Stack Software Engineer specializing in Ruby on Rails and the modern Rails ecosystem. He builds scalable, maintainable web applications using Rails, Hotwire (Turbo & Stimulus), PostgreSQL, and SQLite, with a focus on fast, dynamic user experiences. Through CodeCurious, he shares practical lessons, development insights, and real-world solutions for modern developers.
