fix dining charge calc

app/models/sale.rb

@@ -187,7 +187,10 @@ class Sale < ApplicationRecord
     sale_item.sale_id = self.id
     sale_item.price = diningprice
     sale_item.save
-    self.compute_by_sale_items(self.id, self.sale_items, self.total_discount)
+
+    # Re-calc 
+    sale = Sale.find(self.id)
+    self.compute_by_sale_items(self.id, sale.sale_items, self.total_discount)
   end
 
   def update_item (item)
@@ -224,7 +227,9 @@ class Sale < ApplicationRecord
       subtotal_price = subtotal_price + item.price
       total_taxable = total_taxable + (item.taxable_price * item.qty)
     end
+
     apply_tax (total_taxable)
+
     self.total_amount = subtotal_price
     self.total_discount = total_discount
     self.grand_total = (self.total_amount - self.total_discount) + self.total_tax
@@ -339,6 +344,8 @@ class Sale < ApplicationRecord
 
   # Tax Calculate
   def apply_tax(total_taxable)
+    shop = Shop.first();
+    
     #if tax is not apply create new record
     SaleTax.where("sale_id='#{self.sale_id}'").find_each do |existing_tax|
       #delete existing and create new