ENV var to Config object translation with validations.

Collection of validations and complex assertions

html_pretty is yet another HTML prettifier. It purposefully does not do parsing or validation.

Hval 🐳 is hash validation gem

Custom ActiveModel::Validations to Make Your Life Easier

The Atlas Engine is a rails engine that provides a GraphQL API for address validation.

Provides validation and proper formatting for ISBN13 numbers.

IBAN rails validator with iso-iban.

Gem Utilities for ISBN validation and Isbn Conversion

iTunes Receipt validation

iTunes Receipt validation library

jacaranda generates helper methods based on your model validations.

Wrap validation conditions with a single command

Handle validation, coercion, and attributes.

Tiny plugin for MongoMapper to strip whitespace from strings before validation.

Adds the association and validation macros for Rspec in the same way Shoulda does for ActiveRecord.

An ActiveModel extension that strips tags from attributes before validation using the strip-tags helper.

JSON Data Definition Format validation for Ruby

ActiveModel::Unvalidate provides a clean api for removing existing validations from models

MySQL constraints in migrations similiar to ActiveRecord validations