Logobox translates ICO of the company into appropriate logo url at logobox.cz\nIt can check that the logo is uploaded and make the ICO validation.

An ActiveModel validator that consolidates multiple password validations.

Gem for validating complex JSON payloads in a functional way

It's a simple tool that provides helper methods for credit card number validations using Luhn Algorithm.

Generates Rails models from the target database... magically! Validations and associations included.

This gem helps you to create real validation for email, not just a simple regex

A mail gem based validator for rails

A high-level IO library that provides validation, type conversion, and more for command-line interfaces. HighLine also includes a complete menu system that can crank out anything from simple list selection to complete shells with just minutes of work.

This RubyGem allows you to prevent particular database fields from being changed after an Active Record object is created. A validation error occurs on updates if an attribute of a model object is different from its value in the database.

This RubyGem allows you to prevent particular database fields from being changed after an Active Record object is created. A validation error occurs on updates if an attribute of a model object is different from its value in the database.

A Ruby on Rails library to help with mass database operations like insert, update, save, validations, etc (much faster than typical ActiveRecord Interactions

Merb plugin that provides a Form Builder that will wrap your bound fields with a field div, integrated with the model validation

Just a simple, ready to use interactor implementation with built in validation of input params

A Guilded (http://github.com/midas/guilded/tree/master) component that highlights form fields when they are selected or when they have a validation error.

Store mixed numbers in an ActiveRecord model seamlessly with built-in validation.

Tiny plugin for MongoMapper to sanitize strings before validation.

Modify model fields before validation

In more complex workflows, multiple models that are related to each other need to be created at the same time. This toolkit allows to specifiy models that orchestrate persistence and validation actions of multiple models by nesting them into a so called orchestration model.

Does validations, associations, scopes, filters, pagination, counter cache, request cache, and nested queries. Using a YAML schema file, which supports default values, data types, and security levels for each key.

RSpec matches for Mongoid 4 models, including association and validation matchers