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factory_bot

factory_bot provides a framework and DSL for defining and using model instance factories.

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factoriesfactory-botfactory-girlfixturesrailsrubyrubygemstesting
github.com/thoughtbot/factory_botMITJosh Clayton, Joe Ferris8.2k · 2.5k forks · 312 contributors
Compare
Compares against 6.6.0 (latest stable)
Latest Stable6.6.0May 4, 2026
Latest RC5.0.0.rc2Jan 11, 2019
Latest Alpha1.0.1.alphaOct 6, 2017
Release cadenceEvery 2 months
Last releaseMay 4, 2026
Open advisories0
Changelog quality100% curated
GitHub Releases + CHANGELOG
Release history SecurityYou're on
6.x
STABLE · RCPRE-RELEASEJulOct2024AprJulOct2025AprJulOct2026Apr

21 older or filtered releases not shown.

Upgrade guides

Breaking changes and a migration checklist for each major version
factory_bot 5 → 65.2.0 → 6.6.0May 4, 2026 BreakingBreaking3Security1Platform2New15Changed7Fixed26Other71factory_bot 4 → 54.11.1 → 5.2.0Apr 24, 2020 BreakingBreaking5Deprecated3New4Changed5Fixed11
VersionChannelDateChangesSecurity
6.6.0 StableMay 4, 2026Security1New1Fixed2Other96.5.6 youStableOct 24, 2025Fixed1Other166.5.5 StableAug 15, 2025New4Fixed3Other46.5.4 StableJun 13, 2025Fixed16.5.3 StableJun 2, 2025New1Fixed16.5.2 StableMay 30, 2025Fixed2Other66.5.1 StableJan 31, 2025Changed2Fixed1Other16.5.0 StableSep 6, 2024Fixed2Other136.4.6 StableJan 30, 2024Platform1Other26.4.5 StableDec 30, 2023Platform16.4.4 StableDec 27, 2023Other16.4.3 StableDec 26, 2023Fixed2Other46.4.2 StableNov 22, 2023Fixed16.4.1 StableNov 20, 2023Fixed16.4.0 StableNov 17, 2023New1Other26.3.0 StableSep 1, 2023New2Changed1Fixed3Other136.2.1 StableMar 18, 2022New1Changed1Fixed26.2.0 StableMay 7, 2021New1Changed2Fixed16.1.0 StableJul 8, 2020New1Changed1Fixed16.0.2 StableJun 20, 2020Fixed1