Adds valid transition validations to AR.

Generate TW personal ID number randomly and validation

Presence at least one validation for ActiveModel

FullMetalBody is an input validation tool for ruby on rails.

expose presence-validation in a more controller-friendly manner

Provides parsing, validation & accessors

Helpful rspec matchers for testing validations and associations.

A TOTP generator, that includes validation, generation and send methods. See https://github.com/fboccacini/onetime-totp for reference and usage.

Parameter whitelisting for Sinatra. Provides validation, defaults, and post-processing.

A gem that verifies the integrity of a state history

Description of StrongestValidations.

Provides Argentine phone number parsing, validation, formatting and meta-information.

A Rails plugin that allows validation on partially completed Active Record models (useful in wizards that incrementally build a model).