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Contents
module Effective
class Cart < ActiveRecord::Base
self.table_name = EffectiveOrders.carts_table_name.to_s
belongs_to :user # This is optional. We want to let non-logged-in people have carts too
has_many :cart_items, :inverse_of => :cart, :dependent => :delete_all
# structure do
# timestamps
# end
default_scope -> { includes(:cart_items => :purchasable) }
def add(item, quantity: 1)
raise 'expecting an acts_as_purchasable object' unless item.kind_of?(ActsAsPurchasable)
existing_item = cart_items.where(purchasable_id: item.id, purchasable_type: item.class.name).first
if item.quantity_enabled? && (quantity + (existing_item.quantity rescue 0)) > item.quantity_remaining
raise EffectiveOrders::SoldOutException, "#{item.title} is sold out"
return
end
if existing_item.present?
existing_item.update_attributes(quantity: existing_item.quantity + quantity)
else
cart_items.create(cart: self, purchasable_id: item.id, purchasable_type: item.class.name, quantity: quantity)
end
end
alias_method :add_to_cart, :add
def remove(obj)
(cart_items.find(cart_item) || cart_item).try(:destroy)
end
alias_method :remove_from_cart, :remove
def includes?(item)
find(item).present?
end
def find(item)
cart_items.to_a.find { |cart_item| cart_item == item || cart_item.purchasable == item }
end
def size
cart_items.size
end
def empty?
size == 0
end
def subtotal
cart_items.map { |ci| ci.subtotal }.sum
end
alias_method :total, :subtotal
end
end
Version data entries
24 entries across 24 versions & 1 rubygems