add product sale data

app/models/sale.rb

@@ -846,6 +846,27 @@ def self.get_by_shift_items(shift_sale_range, shift, from, to, status)
   return query,other_charges, discount_query , total_cash_amount , total_card_amount , total_credit_amount , total_foc_amount , total_grand_total , change_amount
 end
 
+#product sale report query
+def self.get_menu_item_query(order_by)
+  query = MenuItem.unscoped.select("acc.id as account_id, 
+                      acc.title as account_name, 
+                      mii.item_instance_code as item_code, " +
+                     "(CASE WHEN si.qty > 0 THEN SUM(si.qty) ELSE 0 END) as total_item," +
+                     "(CASE WHEN si.unit_price > 0 THEN si.unit_price ELSE mii.price END) as unit_price," +
+                     "(CASE WHEN (si.qty * si.unit_price) > 0 THEN (si.qty * si.unit_price) ELSE 0 END) as grand_total," +
+                     "mii.price as unit_price, menu_items.name as product_name, 
+                     mc.name as" +
+                     " menu_category_name,mc.id as menu_category_id, si.remark as status_type, si.price as price ")
+          .joins(" LEFT JOIN menu_item_instances mii ON menu_items.id = mii.menu_item_id" + 
+               " LEFT JOIN menu_categories mc ON mc.id = menu_items.menu_category_id" +
+               " LEFT JOIN accounts acc ON acc.id = menu_items.account_id" +
+               " LEFT JOIN sale_items si ON si.item_instance_code = mii.item_instance_code" +
+               " LEFT JOIN sales s ON s.sale_id = si.sale_id")
+          .group("mc.id, menu_items.name, si.qty, (CASE WHEN si.unit_price > 0 THEN si.unit_price ELSE mii.price END)")
+          .order("si.qty #{order_by}, menu_items.menu_category_id #{order_by}")
+end
+#product sale report query
+
 def self.get_shift_sales_by_receipt_no(shift_sale_range,shift,from,to,payment_type)
     ## => left join -> show all sales although no orders
     if payment_type.blank?