Explicit is a validation and documentation library for REST APIs that enforces documented types at runtime

Numverify: Global Phone Number Validation & Lookup JSON API

Resulting is a library for graceful result handling. It provides a result class with a few methods that can be used as a mixin. Using these results, they can be passed to save and validation services which handle them gracefully, returning early when there is a failure, or ensuring success for al...

functional classes with param validations for cautious developers

Inspector is a validation library for Ruby with zero assumptions

ActiveModel validation for credit card number.

Command line tool to automate creation of chef orgs, chef policy repositories, and validation key integration with vco

Validations for european countries VAT numbers

GuideRail transforms various data sources into safe, immutable `Data` objects. By leveraging the robust validation capabilities of `dry-schema`, it provides a clear and declarative way to define, validate, and instantiate your data structures.

Three level validation on email addresses for ActiveRecord.

Validations is a library for validating data structures.

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

Provides wrapper functionality and authentication for REST and RPC HTTP requests to OpenSocial-compliant endpoints, along with validation of incoming signed makeRequest calls.

Ruby on Rails plugin for HTML validation and link checking

A small library for manipulating form-based data with validations and attributes coercion.

Hash validation for 'options'-like methods.

String, time, file, crypto, array, validation, debug, DSL, formatting and more.

Read model file to extract the validations/associations and then utilize Rails generator to write correspondent shoulda test cases to your correspondent spec file

DrySQL uses your DB's information schema to identify keys, and generate associations and validations for ActiveRecord objects. You defined the schema on your DB ... don't re-define it in your application code. Legacy DB Tables, Ruby Desktop apps, Rails apps...DrySQL's got all your databases covered

Display error messages in qtips(tooltip) for all rails erros and jquery validation errors