Ruby on Rails
Validation Reflection

This plugin adds three things

• Reflective access to validations
  • ModelClass.reflect_on_all_validations
  • ModelClass.reflect_on_validations_for(:property)

• It provides “declarative” methods for defining validations based on database metadata@
  • validates_presence_of_mandatory_content_columns
  • validates_lengths_of_string_attributes
  • validates_all_associated

• It reflects validation information into the class attributes of HTML elements generated from rhtml templates. See test/instance_tag_validations_test.rb for what this looks like. Yes, for validates_format_of it gets nasty.

http://www.schuerig.de/michael/rails/validation_reflection/

New Version:
http://agilewebdevelopment.com/plugins/validation_reflection
svn://rubyforge.org//var/svn/valirefl/validation_reflection/trunk