modify ld processing

billard/models.py

@@ -127,12 +127,13 @@ def process_location_data():
             desk = desk[0]
             ac = desk.accounting_set.order_by('time_from').reverse()
             if ld.on_off:
+                acc = None
                 if ac.count() > 0 and ac[0].time_to is None:
-                    ac[0].time_to = ld.tst
-                    ac[0].save()
                     mail_admins(subject='Accounting passt nicht',
                                 message='Vorheriges Accounting nicht abgeschlossen: Desk_id {}, Accounting_id {}'
                                 .format(desk.id, ac[0].id))
+                    acc = ac[0]
+                if acc is None:
                     acc = Accounting(
                         desk=desk,
                         time_from=ld.tst,