A toolkit for building modeling frameworks like Active Record and Active Resource. Rich support for attributes, callbacks, validations, observers, serialization, internationalization, and testing.
Required Ruby Version
>= 1.8.7
Authors
David Heinemeier Hansson
Versions
- 8.1.3.1 July 29, 2026 (69.5 KB)
- 8.1.3 March 24, 2026 (69.5 KB)
- 8.1.2.1 March 23, 2026 (69 KB)
- 8.1.2 January 08, 2026 (69 KB)
- 8.1.1 October 28, 2025 (69 KB)
- 3.2.20 October 30, 2014 (43 KB)