juniorRuby on Rails
What is ActiveRecord in Rails?
Updated May 24, 2026
Short answer
ActiveRecord is Rails ORM that maps database tables to Ruby objects.
Deep explanation
It allows CRUD operations without writing SQL directly. Each model class represents a table, and instances represent rows.
Real-world example
Used to manage users, orders, and products in e-commerce apps.
Common mistakes
- Overusing raw SQL instead of ActiveRecord methods.
Follow-up questions
- What are ActiveRecord callbacks?
- How does it handle associations?