AASC Example

Gemfile

source "https://rubygems.org"

gem "acts_as_shopping_cart"
gem "sqlite3"

Gemfile.lock

GEM
  remote: https://rubygems.org/
  specs:
    activemodel (3.2.13)
      activesupport (= 3.2.13)
      builder (~> 3.0.0)
    activerecord (3.2.13)
      activemodel (= 3.2.13)
      activesupport (= 3.2.13)
      arel (~> 3.0.2)
      tzinfo (~> 0.3.29)
    activesupport (3.2.13)
      i18n (= 0.6.1)
      multi_json (~> 1.0)
    acts_as_shopping_cart (0.1.6)
      activerecord (~> 3.0)
    arel (3.0.2)
    builder (3.0.4)
    i18n (0.6.1)
    multi_json (1.7.4)
    sqlite3 (1.3.7)
    tzinfo (0.3.37)

PLATFORMS
  ruby

DEPENDENCIES
  acts_as_shopping_cart
  sqlite3

test.rb

require 'bundler'

Bundler.setup

require 'active_record'
require 'acts_as_shopping_cart'

ActiveRecord::Migration.verbose = false
ActiveRecord::Base.establish_connection(:adapter => "sqlite3", :database => ":memory:")

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

  def taxes
    0
  end
end

class ShoppingCartItem < ActiveRecord::Base
  acts_as_shopping_cart_item
end

@cart = ShoppingCart.create

@product = Product.new

@cart.add @product, 1000
@cart.add @product, 1000

puts "Total Unique items: #{@cart.total_unique_items}"
puts "Total: #{@cart.total}"
puts "Qty in Item object: #{@cart.shopping_cart_items.last.quantity}"