Databases on Rails. Build a persistent domain model by mapping database tables to Ruby classes. Strong conventions for associations, validations, aggregations, migrations, and testing come baked-in.

Required Ruby Version

>= 1.9.3

Authors

David Heinemeier Hansson

Versions

  1. 8.1.3 March 24, 2026 (556 KB)
  2. 8.1.2.1 March 23, 2026 (555 KB)
  3. 8.1.2 January 08, 2026 (554 KB)
  4. 8.1.1 October 28, 2025 (554 KB)
  5. 8.1.0 October 22, 2025 (554 KB)
  6. 4.2.5.2 February 29, 2016 (323 KB)
Show all versions (519 total)

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