Generate attributes with strong types and validations.

Provide a simple validation method and validator class for Ruby

Imports delimited text files to Active Record or Datamapper, with validations.

Clean Language Validation

Providing special validation error building for has_many collection in Rails.

Use the familiar ActiveModel::Errors pattern for controller validations

Detects issuer from a number, has ActiveModel validations and translations support.

Validations for Non Active Record Models

ActiveModel Validation for CSS

A simple library for external validations of POROs

ActiveModel validation against duplicating records.

A runtime validation configuration DSL

Configurator for Ruby Applications with some validation and sugars.

Adds a test that validates all your Rails fixtures.

BagIt package generation and validation

Format and validation a URL in active record

email validation

Validations, except they don't do anything.

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

Provides validation and proper formatting for ISBN13 numbers.