SimpleDescriptor is a gem that makes easy to attach extra informations
to a generic ruby class.
Version 0.2.0 implements specific method to integrate with
ActiveRecord and help you keeping DRY your model validation code.
What you get is the possibility to enforce automatically validation
inherited from database definition (length of strings, numeric
formats, required fields).
In addition to this you get a set of methods to easily ask to your
models which validations criteria are applied, tweak them and add new
ones.This way you can build views helper that are aware of your model
validation and display data coherently.
SimpleDescriptor makes also easy to build standardized ways to
manipulate different models that share some common characteristics.
To know more about the gem read the blog post
http://assertbuggy.blogspot.com/2007/06/simple-descriptor-code-less-validate.html
or visit the rubyforge home http://simpledesc.rubyforge.org