Range on Rails: How PostgreSQL Multirange Turned Complex Booking Logic into Elegant Simplicity

February 13, 2026

Range on Rails: How PostgreSQL Multirange Turned Complex Booking Logic into Elegant Simplicity

At Kaigi on Rails 2025 , Tomohiro Umeda from RIZAP Technologies presented a real-world backend engineering case study: how to build a flexible reservation system — without fixed time slots — using PostgreSQL’s Range and Multirange types.

The talk, titled:

“Range on Rails — How Multirange Dramatically Simplified Complex Logic”

demonstrates how reframing a problem mathematically can replace tangled conditional logic with clear, declarative data operations.

---

👉 Read the full article.

https://rubystacknews.com/2026/02/13/range-on-rails-how-postgresql-multirange-turned-complex-booking-logic-into-elegant-simplicity/

---