Use reflection to spec ActiveModel validations

ActiveModel Interface for validation_reflection

A collection of common validation rules

A collection of delicious Rails validators

Checks whether an ActiveModel Validator is attached to an attribute of a Model and with which options

extension for active_record

Validação de inscrição estadual dos 26 estados federativos

Allow validate uniqueness across multiple column

An implementation of several error checking algorithms,including Luhn and Damm.

ActiveModel validation for credit card number.

As your Rails projects evolve and grow, your model validations tend to change as well. An unfortunate side effect of this evolution is that your table- backed ActiveRecord::Base descendants end up with rows that instantiate invalid model instances. ValidData generates a report for your Rails application, notifying you exactly how many rows in your models are invalid for each model.

Your favourite validations with Ruby

Validatable configurations

Extension to ActiveModel for validating hostnames

The beginning of a validation library

Ruby gem to check validity of Estonian ID card or Estonian Passport

valid_syntax checks if a string containing ruby code has any syntax errors. If this is the case, the syntax errors will be stored to be later accessed.

Yet another CSV validator library. Just better.

A rails engine to extend ActiveFedora gem to play nicely with Valkyrie data mapper gem

Valkyrie::MetadataAdapter for Postgres using Sequel.