check no order

app/controllers/api/bill_controller.rb

@@ -11,6 +11,7 @@ class Api::BillController < Api::ApiController
       table = 0
       if (params[:booking_id])
         booking  = Booking.find(params[:booking_id])
+        if booking.booking_orders.count > 0
           if booking.checkin_at.utc.strftime("%Y-%m-%d %H:%M") > Time.now.utc.strftime("%Y-%m-%d %H:%M") && booking.checkout_at.nil?
             @status = false
             @error_message = "Operation failed, Could not request bill!"
@@ -51,6 +52,10 @@ class Api::BillController < Api::ApiController
               end
             end
           end
+        else
+          @status = false 
+          @error_message = "There is no order for '#{params[:booking_id]}'"
+        end
       elsif (params[:order_id])
         order = Order.find(params[:order_id])
         @sale = Sale.new

app/views/api/bookings/show.json.jbuilder

@@ -37,8 +37,9 @@ if (@booking)
         json.remark                item.remark
         json.item_status           item.order_item_status
         @total_amount = @total_amount + (item.price * item.qty)
+    else
+      json.success false
     end
-
   end
 
   json.sub_total @total_amount