Ruby Library for the numverify API, Global Phone Number Validation & Lookup, https://numverify.com/

A number of fully-tested clients for interacting with all of the available postcode anywhere services, including capture, cleansing, payment validation and email validation

CPF validation for ActiveModel and Rails

A Unicode Normalization Form validation plugin for Rails

date validation

Default validations for string and integer attributes

Simple validation of params with a concern

Validations for Ohm models

The validation is to compare values between web page values and mobile api responses

Validations for Argentinian specific information

ActiveRecord style validations for Liquid content in your ActiveRecord models. See the README to get the lowdown.

SpicyValidation overwrite model file that user would like to generate validation.

ShipEngine's easy-to-use REST API lets you manage all of your shipping needs without worrying about the complexities of different carrier APIs and protocols. We handle all the heavy lifting so you can focus on providing a first-class shipping experience for your customers at the best possible pri...

phone_validator makes phone validation natural for ActiveModel 3+ objects. Validation using global_phone.

Validate graphql-ruby arguments easily with dry-validation

A lib to help with hash validations, based on Validatable

Simple client validation messages

Performs k-fold cross-validation on machine learning classifiers.

Some useful validators for sexy validation.

Allows easy determination of which validation rules apply to a given column, at the expense of increased verbosity