Delegates validation between objects

A notifier for form validation errors.

Find and report ActiveRecord validation errors.

validation_examples_matcher provides rspec matcher testing validations with examples.

Use reflection to spec ActiveModel validations

Helper to customize the validation messages in Hanami application views.

log active model validation errors to get better insights in the usability of your forms

If you need a way to easily skip validations on some attributes and only in certain cases, this gem will allow you to do it in a clean and elegant way.

validations-skipper is a gem that enables objects to skip specified validations with ease. It can be applied to ActiveRecord::Base classes.

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.

contextual validations for controllers and wanna learn to do other stuff good too

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 appl...

Your favourite validations with Ruby

Extension to ActiveModel for validating hostnames

Validate ISO country and Code