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

    Required Ruby Version

    >= 3.2.0

    Authors

    David Heinemeier Hansson

    Versions

    1. 8.1.3 March 24, 2026 (69.5 KB)
    2. 8.1.2.1 March 23, 2026 (69 KB)
    3. 8.1.2 January 08, 2026 (69 KB)
    4. 8.1.1 October 28, 2025 (69 KB)
    5. 8.1.0 October 22, 2025 (69 KB)
    Show all versions (458 total)

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