Handles application errors and model validations

Schema-based validation and coercion for Ruby data structures, inspired by Prismatic/schema for Clojure.

Model.validates { presence_of :name }

Swift code validation and lookup Ruby gem

A Rails plugin that adds an ActiveRecord validation helper to do range and start/end date checking in.

Validatable is a library for adding validations.

CPF and CNPJ validations for ActiveModel and Rails

This library helps validate attributes to specific types in the same way that ActiveModel valiations work. Able to chain additional modifiers to each validation.

Encapsulate form logic and validations in a simple object

Decode iTunes OS X and iOS receipts without remote server-side validation by using the Apple Inc Root Certificate.

Provides JSON Schema validation for ElasticGraph.

IBAN + SWIFT/BIC: Information, Validation and Formatting.

Token validation for distributed resource servers

A development toolkit for Ruby with several small/cohesive abstractions (monads, enums, business logic, data validation...) to empower your development workflow - It's totally free of dependencies.

LHS ia a Rails-Gem, providing an ActiveRecord like interface to access HTTP-JSON-Services from Rails Applications. Special features provided by this gem are: Multiple endpoint configuration per resource, active-record-like query-chains, scopes, error handling, relations, request cycle cache, batc...

Checks required env variables and its format using dotenv and .env.sample files. Sample files include validation documentation which is interpreted and used to validate your environment.

Validate iTunes Transaction and Unified style receipts with local decoding and remote validation.

Ruby gem for runtime data validation and monitoring using the contracts approach.

Opt-in validations for your ActiveRecord models based on your MySQL database constraints, including text field size, UTF-8 encoding issues, and NOT NULL constraints.

Membrane provides an easy to use DSL for specifying validation logic declaratively.