Foreign keys support for ActiveRecord.
THE PROJECT IS DEPRECATED. Please, use github.com/lomba/schema_plus
Rails::Initializer.run do |config| ... config.gem "active_record_foreign_keys", :source => "http://gemcutter.org" ... end $ rake gems:install
def self.up # create reference table create_table :users do |t| end # create referencing table create_table :a_examples do |t| t.references :user, :foreign_key => true end # or create_table :b_examples do |t| t.references :user, :foreign_key => { :on_update => :cascade, :on_delete => :restrict } end # or create_table :c_examples do |t| end add_foreign_key :c_examples, :user_id, :users, :id, :on_update => :no_action, :on_delete => :set_null # or change existing table change_table :d_examples do |t| t.references :user, :foreign_key => true end end def self.down # remove constraint remove_foreign_key :examples, :user_id, :users, :id end
Copyright © 2009 Anton Ageev. See LICENSE for details.