It provides basic command line tools for simply defining things like cross validations, factorial experimental design and basic statistics. All of this can be run in a distributed manner.

Extends activerecord validations with helpers

Provides some extra validations for ActiveModel.

Turbolinks Plugin for ClientSideValidaitons

Client Side Validations support for Rails 2.x

Flags is a framework for Ruby which allows the definition of command-line flags, which are parsed in and can be accessed smartly from within your Ruby code. This framework allows for numerous different flag types, and takes care of the process of type conversion and flag validation (type and val...

Builds forms with a standard template that has labels, hints, and validations

This gem allows model to have state, and based on that create wizard with step by step validations

This is an alpha version. Create a class implements from FluentValidator, then use rule_for method to register validators in its construction method.

Headhunter is an HTML and CSS validation tool that injects itself into your Rails feature tests and automagically checks all your generated HTML and CSS for validity. In addition, it also looks out for unused (and therefore superfluous) CSS selectors.

A collection of common validation rules

Rails' default update_attributes behavior is that when any validation fails, none of the data gets saved. However, in some instances this is not the most ideal behavior. If you import partial data which users then have the task of completing, not saving partially completed forms can create a real...

A Rails plugin that allows validation on partially completed Active Record models (useful in wizards that incrementally build a model).