order_item.rb in unidom-order-0.3

- old
+ new

@@ -2,10 +2,12 @@
 
 class Unidom::Order::OrderItem < ActiveRecord::Base
 
   self.table_name = 'unidom_order_items'
 
+  include Unidom::Common::Concerns::ModelExtension
+
   validates :ordinal,         presence: true, numericality: { only_integer: true, greater_than: 0, less_than: 1000000000 }
   validates :unit_price,      presence: true, numericality: { less_than: 1000000000, greater_than: 0 }
   validates :quantity,        presence: true, numericality: { less_than: 1000000000, greater_than: 0 }
   validates :purchase_amount, presence: true, numericality: { less_than: 1000000000, greater_than: 0 }
   validates :subtotal_amount, presence: true, numericality: { less_than: 1000000000, greater_than: 0 }
@@ -18,8 +20,20 @@
 
   scope :order_is,   ->(order)   { where order_id: (order.respond_to?(:id) ? order.id : order) }
   scope :ordered_is, ->(ordered) { where ordered: ordered }
   scope :placed_by,  ->(placer)  { where placer:  placer  }
 
-  include Unidom::Common::Concerns::ModelExtension
+  def self.order!(order, ordered, unit_price, quantity = 1, placer = order.placer)
+    item = order.items.ordered_is(ordered).placed_by(placer).valid_at.alive.first
+    if item.present?
+      item.quantity        += quantity
+      item.unit_price      =  unit_price
+      item.purchase_amount =  item.unit_price*item.quantity
+      item.subtotal_amount =  item.purchase_amount+item.adjustments.valid_at.alive.sum(:amount).to_f
+      item.save!
+    else
+      ordinal = 1+order.items.valid_at.alive.maximum(:ordinal).to_i
+      order.items.create! ordered: ordered, placer: placer, ordinal: ordinal, quantity: quantity, unit_price: unit_price, purchase_amount: unit_price*quantity, subtotal_amount: unit_price*quantity, opened_at: Time.now
+    end
+  end
 
 end