RailsDevsForDataIntegrity
=========================
Rails Devs For Data Integrity catches unique key and foreign key violations
coming from the  MySQLdatabase and converts them into an error on the
ActiveRecord object similar to validation errors

 class User < ActiveRecord::Base
   handle_unique_key_violation  :user_name, :message => 'is taken"
   handle_foreign_key_violation :primary_email_id, :message => 'is not available'
 end

Instead of this nasty MySQL foreign key error:
 ActiveRecord::StatementInvalid: Mysql::Error: Cannot add or update a child row:
 a foreign key constraint fails (`zoo_development/animals`,
 CONSTRAINT `fk_animal_species` FOREIGN KEY (`species_id`)
 REFERENCES `species` (`id`) ON DELETE SET NULL ON UPDATE CASCADE)

 >> user.errors.on(:user_name)
 => "association does not exist."

Or in the case of a unique key violation:

  >> user.errors.on(:primary_email_id)
  => "is a duplicate."

==== Developers
* Blythe Dunham http://snowgiraffe.com

=== Install
* Rdoc:           http://snowgiraffe.com/rdocs/rails_devs_for_data_integrity
* Github Project: http://github.com/blythedunham/rails_devs_for_data_integrity/tree/master
* Install:        script/plugin install git://github.com/blythedunham/rails_devs_for_data_integrity.git



Copyright (c) 2009 [name of plugin creator], released under the MIT license