fix discount and receipt bill

app/controllers/origami/discounts_controller.rb

@@ -97,13 +97,14 @@ class Origami::DiscountsController < BaseOrigamiController
     if Sale.exists?(sale_id)
       sale = Sale.find(sale_id)    
       table_id = sale.bookings[0].dining_facility_id
-      table_type = DiningFacility.find(table_id).type
-                    
+      table_type = DiningFacility.find(table_id).type 
+
+      discount_items = []                
       #destroy all discount sale item
-      sale.sale_items.each do |si|  
-        if si.remark == "Discount" && si.price < 0                                   
-          sale.total_amount = (sale.total_amount + si.price.abs)
-          si.destroy
+      sale.sale_items.each do |si|          
+        if si.remark == "Discount" && si.price < 0                                 
+          sale.total_amount = (sale.total_amount + si.price.abs) 
+          discount_items.push(si)         
         end
       end                 
 
@@ -111,6 +112,9 @@ class Origami::DiscountsController < BaseOrigamiController
       # sale.grand_total = (sale.total_amount - sale.total_discount) + sale.total_tax;   
       # sale.save
 
+      #destroy in sale.sale_items
+      sale.sale_items.destroy(discount_items)
+
       # Re-calc All Amount in Sale
       sale.compute_by_sale_items(sale_id, sale.sale_items, 0)
       result = {:status=> "Success", :table_id => table_id, :table_type => table_type }
@@ -139,7 +143,6 @@ class Origami::DiscountsController < BaseOrigamiController
            arr.push(str)
         end
       end 
-
     end
 
     generic_customer_id = sale.customer.membership_id