@@ -9,9 +9,28 @@ Available constraints: * Positive: Validates positiveness of a number * Length: Validates length of a value * Uniqueness +* Foreign keys == Example +Foreign keys: + + class AddForeignKeysToModels < ActiveRecord::Migration + + def self.up + # add_foreign_key :from_table, :from_column, :to_table + add_foreign_key :articles, :user_id, :users + end + + def self.down + # remove_foreign_key :from_table, :from_column + remove_foreign_key :articles, :user_id + end + + end + +Validations: + class AddConstraintsToModels < ActiveRecord::Migration def self.up README.rdoc e713dc50740c4a9be66233ef67b710b1ced6dd4d Francesc Esplugas fesplugas@intraducibles.net http://github.com/fesplugas/database_constraints/commit/19ef636d880c339609a3bb8cb918abc7ed1f150d 19ef636d880c339609a3bb8cb918abc7ed1f150d 2009-04-25T03:17:01-07:00 2009-04-25T03:17:01-07:00 Updated README. 777324228360a5988176ec095baaa79482daee3e Francesc Esplugas fesplugas@intraducibles.net