<s> from datetime import datetime <EOL> from django . core . management . base import NoArgsCommand <EOL> from django . db . models import F <EOL> from notifications . models import NotificationQueue <EOL> from notifications import settings as notification_settings <EOL> class Command ( NoArgsCommand ) : <EOL> def handle_noargs ( self , ** options ) : <EOL> notifications = NotificationQueue . objects . exclude ( send_at__gte = datetime . now ( ) ) <EOL> for notification in notifications : <EOL> if notification . tries >= notification_settings . QUEUE_MAX_TRIES : <EOL> notification . delete ( ) <EOL> continue <EOL> backend_class = notification . get_backend ( ) <EOL> backend = backend_class ( user = notification . user , subject = notification . subject , text = notification . text ) <EOL> result = backend . validate ( ) <EOL> if result : <EOL> result = backend . process ( ) <EOL> if result : <EOL> notification . delete ( ) <EOL> else : <EOL> notification . tries = F ( '<STR_LIT>' ) + <NUM_LIT:1> <EOL> notification . save ( ) </s>
