Validation layer for any business logic with a declarative rule-oriented API.

This gem allows you to download a file. However, it will also check to see if a MD5 file exists at the source and compare against the destination for validation

SQLite constraints in migrations similiar to ActiveRecord validations

Nested validations allow a parent's validity to include those of child attributes. Errors messages will be copied from the child attribute to the parent.

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...

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

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.

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

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

A library for parameter validation and parsing. A handy way to check GET/POST params in Ruby webframeworks (like Rails or Sinatra).

A DSL for validating request parameters, raises exceptions when validation failed. Currently only supports Rails.

Flexible DRY validations with API docs generation done right TLDR; parametrics on steroids.

Random Poetry Scraper is a command line gem which returns a configurable number of poems scraped from poemhunter.com. The gem allows you to consume the poems either through a JSON dump or through a command line "pleasure reading" interface. ~Most~ poems on poemhunter.com are in English, but not a...

A library used to create Config classes with validation, type enforcement, casting and other goodies.

Sane parameter validation for Rack::Request. Originally written for use with Sansom.

Angulate adds AngularJS client-side field and validation helpers to Rails form helpers.

Shorter Active Record validations and associations with RSpec and shoulda support

Rails validations for Belgian Government Registration Numbers (Rijksregisternummer)

Collection of validations for Cod Numeric Personal (CNP), Cod de identificare fiscală (CIF) and IBAN (only Romanian format, as published by Romanian National Bank)