functional classes with param validations for cautious developers

Inspector is a validation library for Ruby with zero assumptions

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.

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

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

An admin sets up the raffle entry requirements. Users must meet the raffle validation requirements setup by the admin before entering into the game. Participants can enter into raffle and win points.

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

Handle multiple flash messages and ActiveRecord validation errors with ease.

Partial validation of ActiveRecord objects in Ruby on Rails 4+ made simple.

Shorter Active Record validations and associations with RSpec and shoulda support

A gem for Ruby Rails client side validations.

This gem contains a module of regular expressions objects for consistent validation and business logic.

An attempt to hook up a Rails action controller with Grape parameter validation DSL

Test an API call until its response passes validation or times out.

This restricted_attributes plugin/gem provides the capabilities to restrict attributes(fields) of db table's while add or update a record. It validate your attributes values before your validation stuff.

A tiny Rails plugin to allow validation on RFC-3339 datetime attributes.

A lightweight gem that validates required environment variables at application boot time, providing type checking, format validation, and helpful error messages to prevent production disasters caused by missing or invalid configuration.

Rails validations for Belgian Government Registration Numbers (Rijksregisternummer)

Super Form adopts the concept of forms and fields, making it easy to define fields containing bundled validations and attributes. Also, it aims to supply a handy form builder for these fields.