This gem allows you to create use cases with ActiveModel validations and keep your model clean

Generate jCheck code according to ActiveModel validations

This ruby gem converts time of day to seconds (since midnight) and back. The value in seconds can be used for calculations and validations.

CouchRest::ExtendedDocument provides aditional features to the standard CouchRest::Document class such as properties, view designs, callbacks, typecasting and validations.

Rack parameter validation and type coercion.

Settler can be used for defining application wide settings in Rails. Settings are loaded from a YAML file and stored in the database using ActiveRecord to allow users to update settings on the fly. The YAML configuration allows you to not only specify defaults, but setting value validations and t...

ISO Schematron Validation

DB constraints in migrations similiar to ActiveRecord validations. Core classes

Built for Developers. Ideal for MVPs, product ideation and validation.

Like Active Record's validation feature, but for destroying models

Uses the power and familiarity of ActiveModel::Validations to validate hash structures. Designed for detecting and providing feedback on bad requests to your RESTful Web Service.

BibleReferenceParser can parse scriptures passages, such as 'Gen. 1:15-18, 21' to the individual books, chapters and verses in the passage. It also provides validation for invalid book names, chapters, and verses.

MiniTest matchers for ActiveModel::Validations

This acts_as extension implements a system label and a friendly label on a class and centralizes the logic for performing validations and accessing items by system label.

A macro-style method that will automatically read the database contraints (null requirements, string length, etc) and enforce those at the model level to keep validation more DRY. Provides many options to customize how automatic it is and what columns it affects.

CivilService provides a base class for your service objects. With CivilService, you can use ActiveModel validations to do pre-flight checks before the service runs, and create your own result object classes to capture the results of complex operations.

Dynamic uniqueness validator to validation two fields before save in db.

Parameter validation extension for Sinatra

Adds an abstract EachValidator superclass that you can use to create localizable validations.

Small and extensible data validation toolkit