Verify addresses using SmartyStreets

It allows you to specify validations for method arguments, using `validate_args` to supply validation rules of a hash or array.

Validate SEO-tag format

This Gem is Used for Validations URLs

Allow for validation of only some attributes

Validates Cnpj

Validates CPF

Simple gem helpful in validating standard credit card forms

Help you discover errors early.

extend ActiveRecord validations by checking if a string is a valid email address

Validate HTML files as they leave your app by rack or by mail or by turbo-stream

Add Japanese validators

Automatically adds validations to ActiveRecord models that match your database constraints

Inspired by Airbnb blog post https://medium.com/airbnb-engineering/large-scale-payments-systems-and-ruby-on-rails-bfe5b89f6f4 - by including a module in any of your classes, you can validate the type and presence of a method's parameters.

Validates the given string

Provides a clean DSL to validate params for controller actions.

EachValidator that adds a parent model's association's validation errors to the parent model

Validates wether an association belongs to the same owner

The purpose of this gem is to validate countrycodes in ISO 3166-1 alpha-2 format

ActiveRecord callback which handle the name duplication in your model.