special offers backoffice is ready now

back-office/app/models/item.rb

@@ -3,8 +3,24 @@ class Item < ActiveRecord::Base
   has_many :multi_media_descriptions
   belongs_to :sub_category
   belongs_to :supplier
+  belongs_to :special_offer
 
   validates_presence_of :name, :description, :list_price, :current_input_price, :tags, :unit_id, :code, :sub_category_id, :weight, :supplier_id
 
 
+  # todo build a front end in backoffice (rails)
+  def self.items_to_order
+  	return Item.find_by_sql(%Q{
+  		select s.name as supplier, i.name as item, sum(iic.count) amount, i.current_input_price 
+  		from carts c 
+  		join item_in_carts iic on iic.cart_id = c.id 
+  		join items i on i.id = iic.item_id 
+  		join suppliers s on i.supplier_id = s.id 
+  		where c.confirmed and not (c.packed or c.delivered) 
+  		group by s.name, i.name, i.current_input_price 
+  		order by s.name, amount desc;
+    })
+  end
+
+
 end