Contents

##
# As Item Shopper 是购物项所有者的领域逻辑关注点。

module Unidom
  module Shopping
    module Concerns

      module AsItemShopper

        extend  ActiveSupport::Concern
        include Unidom::Common::Concerns::ArgumentValidation

        included do |includer|

          has_many :shopping_items, class_name: 'Unidom::Shopping::ShoppingItem', as: :shopper

          ##
          # 以购物者的身份，将商品 it ，放入购物车 into 。购物时间是 at ，缺省为当前时间。单价是 unit_price ，缺省为 0 。数量是 quantity ，缺省为 1 。如：
          # current_person.add! coca_cola, into: shopping_cart, unit_price: 3.50, quantity: 3
          def add!(it, into: nil, at: Time.now, unit_price: 0, quantity: 1)

            assert_present! :it, it

            query = shopping_items.shopping_cart_is(into).shopped_is(it).valid_at(now: at).alive
            item  = query.first
            if item.present?
              item.unit_price = unit_price
              item.increment! :quantity, quantity
            else
              item = shopping_items.create! shopping_cart: into, shopped: it, unit_price: unit_price, quantity: quantity, opened_at: at
            end
            item
          end

          def add?(it, into: nil, at: Time.now)
            shopping_items.shopping_cart_is(into).shopped_is(it).valid_at(now: at).alive.exists?
          end

        end

        module ClassMethods
        end

      end

    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
unidom-shopping-2.0.1	app/models/unidom/shopping/concerns/as_item_shopper.rb