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

Bailitheoir is a JavaScript that you can insert into your pages to ensure that the browser will implement form input validation.

Provide a simple validation method and validator class for Ruby

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

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.

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

Provides basic ORM functionalities like CRUD operations, transaction support, and custom validations.

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

Local Apple receipt validation.

Gem for simplify display of validation messages and flash.

Numverify: Global Phone Number Validation & Lookup JSON API

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

This is a module for the Ruby language that defines a callback GEDCOM parser. It does not do any validation of a GEDCOM file, but, using application-defined callback hooks, can traverse any well-formed GEDCOM.

Rails gem/plugin that implements an ActiveRecord validation helper called validates_as_date_time which validates U.S. dates, times, and date-times