A toolkit for building modeling frameworks like Active Record. Rich support for attributes, callbacks, validations, serialization, internationalization, and testing.

Required Ruby Version

>= 2.2.2

Authors

David Heinemeier Hansson

Versions

  1. 8.1.4 September 24, 2026 (70 KB)
  2. 8.1.3.1 July 29, 2026 (69.5 KB)
  3. 8.1.3 March 24, 2026 (69.5 KB)
  4. 8.1.2.1 March 23, 2026 (69 KB)
  5. 8.1.2 January 08, 2026 (69 KB)
  6. 5.1.4 September 08, 2017 (50 KB)
Show all versions (463 total)

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