Removed multi-row error

Add try except block for other cases

app/api/helpers/order.py

@@ -73,7 +73,14 @@ def create_pdf_tickets_for_holder(order):
             save_to_db(holder)
 
         # create order invoices pdf
-        order_ticket_info = OrderTicket.query.filter_by(order_id=order.id).one()
+        order_ticket_info_object = OrderTicket.query.filter_by(order_id=order.id)
+        try:
+            order_ticket_info = order_ticket_info_object.one()
+        except MultipleResultsFound:
+            order_ticket_info = order_ticket_info_object.first()
+        except NoResultFound:
+            raise UnprocessableEntity({'pointer': ''}, 'Order Ticket Info missing.')
+
         create_save_pdf(render_template('pdf/order_invoice.html', order=order, event=order.event,
                         tax=order.event.tax, tickets=order.tickets, order_tickets_info=order_ticket_info),
                         UPLOAD_PATHS['pdf']['order'], dir_path='/static/uploads/pdf/tickets/',