Struct + validation + inheritable + default_value + etc...

An extension of the Dry family of gems (dry-rb.org). This gem can generate valid payloads for contracts defined using the dry-validation gem.

Databases on Rails. Build a persistent domain model by mapping database tables to Ruby classes. Strong conventions for associations, validations, aggregations, migrations, and testing come baked-in.

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.

Rubinium is a FIT-style code generator for Selenium. It supports validation and allows the user to include arbitrary ruby in the test.

Interface to the W3C Feed Validation online service http://validator.w3.org/feed/

Dr Nic's Magic Models - Invisible validations, assocations and Active Record models themselves!

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

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

add description to your classes and make your ActiveRecord validations smarter

Validatable is a library for adding validations.

Get the power of ActiveRecord models, including validation, without having a table in the database.

Validation of popular Polish codes, such as PESEL, NIP, REGON, post codes, car registration numbers, credit card numbers and anything really that can be helpful in advanced commercial application for Polish customers.

Three level validation on email addresses for ActiveRecord.

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.

== FEATURES/PROBLEMS: * a simple FriendMailer object * email templates for HTML and plain text alternative * configurable amount of friends * support for including a user submitted message in the email * support for HTML as well as XML (nice for Flash integration) * server-side validation * erro...

A Ruby wrapper for the World Wide Web Consortium’s online validation services.

CommandSet is a user interface framework. Its focus is a DSL for defining commands, much like Rake or RSpec. A default readline based terminal interpreter (complete with context sensitive tab completion, and the amenities of readline: history editing, etc) is included. It could very well be ad...

== FEATURES/PROBLEMS: Right now, only one function: parse. This does the validation and parsing all in one step. This is intended to be used by any reader (who would take care of what links have been read, etc). == SYNOPSIS: results = Zsff.parse(url) results[:errors] #Any errors encountered ...

Heavily armed validation framework.