Rails 2 and Rails 3 plugin. Validates e-mail address format (RFC2822 and RFC3696) and whitelist/blacklist the domain part.

Use those validators for Australian numbers as ABN, TFN, ...

Validations for making ActiveRecord objects immutable.

Validates uniqueness of has_many children

Validate specific value for Rails

Add to Rails the possibility to validate the quantity of an associate model

SWIFT validator for ActiveRecord attributes.

Validates TeamViewer ID for ActiveRecord attributes.

Library for validating unchangeable attributes.

A notifier for form validation errors.

Find and report ActiveRecord validation errors.

Reuse your Rails model validations on the client-side.

The beginning of a validation library

Ensure that your routes don't conflict. Main use cases are for dynamic routes that could conflict with resourcefully generated routes.

Adds valid transition validations to AR.

ActiveRecord force destroy records with all related associations

This gem builds PostgreSQL databases from .matrix files and metadata spreadsheets

Add Varnish cache headers to controller actions. Automatically purge instances and models on after_create, after_update and after_destroy callbacks.

Displays your routes, classes, modules and thier methods & variables. Provides full stack of hierarcy, dependencies, associations and configurations of your project.

Create virtual attributes for active record. Uses serialization