ActiveRecord::Base.establish_connection(:adapter => "sqlite3", :database => ":memory:") #ActiveRecord::Base.logger = Logger.new(STDOUT) ActiveRecord::Schema.define(:version => 1) do create_table :shopping_carts create_table :shopping_cart_items do |t| t.shopping_cart_item_fields end create_table :products do |t| t.string :name end end class Product < ActiveRecord::Base end class ShoppingCart < ActiveRecord::Base acts_as_shopping_cart end class ShoppingCartItem < ActiveRecord::Base acts_as_shopping_cart_item end