A gem that provides credit card validation. It is basically a ruby port of the javascript credit card validator by Thomas Fuchs (madrobby) (http://github.com/madrobby/creditcard_js).

Add a validation filter to your controller.

Automatically includes Modules from app/concerns/<module_with_concerns>/<concern>.rb into <module_with_concerns> to ease monkey-patching associations and validations on ActiveRecord::Base descendents from other gems when layering schemas.

Adds validation methods to ActiveModel for validating dates and times. Works with multiple ORMS.

CPF validation for ActiveModel

Scrivener removes the validation responsibility from models and acts as a filter for whitelisted attributes.

Config. Defined as a class. Used as an instance. Support for inheritance and composition. Lazy instantiation. Thread-safe. Command-style DSL. Validation layer. Support for YAML, TOML, JSON, __END__, ENV. Extremely simple to define. Extremely simple to use.

Implements the common view pattern by which a list of messages are shown at the top, often a combination of flash messages and ActiveRecord validation issues on one or more models.

Rack middleware for Weixin apps: message validation/parser/generator

ActiveRecord extension. Allows to save record without calling callbacks and validations.

CNPJ validation for ActiveModel

Validatable is a library for adding validations.

Plugs directly in the the Google's native C++ [libphonenumber](https://github.com/google/libphonenumber) for extemely _fast_ and _robust_ phone number parsing, validation, and formatting. On average, most methods are 40x t0 50x faster than other Ruby phone number libraries.

This plugin gives you the option to not have your custom validation error message prefixed with the attribute name

Provides JSON Schema validation for ElasticGraph.

Validatable is a library for adding validations. Now compatible with Ruby 1.9.2+

Interactors are a pattern for structuring your business logic into units. They have a flexible context that they pass between them, which makes them easy-to-write, but hard-to-understand after you've written them. Much of this confusion comes from not knowing what the interactor is supposed to ta...

TLSPretense provides a set of tools to test SSL/TLS certificate validation. It includes a library for generating certificates and a test framework for running tests against a client by intercepting client network traffic."

Handles application errors and model validations

Post/zip code formatting and validation for the UK, US, CA and more.