µValidator is a zero dependency validation library, which mimics ActiveModel::Error behaviour

Adds parameter validation and error control to interactor

A method construction and validation toolkit.

Methodic : provide Hash table options arguments manager (specifications and validations

MinHTTP allows one to send and receive raw HTTP requests. It's a very thin wrapper around EventMachine's connect method with some SSL validation added.

Provides data class validation for active-model objects

Wrap validation conditions with a single command

Handle validation, coercion, and attributes.

Tiny plugin for MongoMapper to strip whitespace from strings before validation.

Adds the association and validation macros for Rspec in the same way Shoulda does for ActiveRecord.

An ActiveModel extension that strips tags from attributes before validation using the strip-tags helper.

JSON Data Definition Format validation for Ruby

ActiveModel::Unvalidate provides a clean api for removing existing validations from models

MySQL constraints in migrations similiar to ActiveRecord validations

Generates a Dry::Struct object from Dry::Validation::Contract schemas to avoid repetition when passing DTO's to your services.

This gem covers the generation and validation of the Portuguese Fiscal Code (or NIF). It also includes a rails custom validator.

FullMetalBody is an input validation tool for ruby on rails.

An ActiveModel extension that automatically converts all non-English digits to English digits before validation. https://github.com/aalyahya/normalize_digits

Provides parsing, validation & accessors

Automatically pass attributes through Sanitize before validation