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