Rack validation middleware using Swagger

Adds CPF, CNPJ and Email validation

validation error renderer for ajax request

Similar to strong_parameters, but adds type validation and makes it possible to retrieve the invalid or unpermitted parameters

Replace complex regex patterns with simple, readable methods for string validation and manipulation

A component to auto generate seed data with ActiveRecord using a set of predefined or custom rules respecting models validations

Client side validation with parsley and simple_form.

The SDK allows framework independent two-factor authentication for your web application. Client handles both token generation and validation.

DSL for method arguments validation and casting

A schema language / type system / validation framework, for semi-structured data and for data in dynamic languages

The `Type` gem provides tools for type-validation and type-casting, and is useful for ensuring well-formed messages are passed to external APIs/

Takes the Instruction Input as Rule, parse the CSV files and applies the validation and returns valid and invalid units

A State Machine implementation of a UTF-8 Encoding Validation algorithm.

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

Rails gem/plugin that implements an ActiveRecord validation helper called validates_as_email which validates email address (RFC822)

Rails gem that implements an ActiveRecord validation helper called validates_as_postal_code which validates U.S. postal codes

API for the metadata validation service.

Makes boolean validations a little cleaner.

Automatic field validation for forms backed by DataMapper models through Sinatra.

Validations for Ruby objects