from django.contrib.contenttypes.models import ContentType from openslides.utils.autoupdate import inform_changed_data from .models import Item def listen_to_related_object_post_save(sender, instance, created, **kwargs): """ Receiver function to create agenda items. It is connected to the signal django.db.models.signals.post_save during app loading. """ if created and hasattr(instance, 'get_agenda_title'): Item.objects.create(content_object=instance) inform_changed_data(instance) def listen_to_related_object_post_delete(sender, instance, **kwargs): """ Receiver function to delete agenda items. It is connected to the signal django.db.models.signals.post_delete during app loading. """ if hasattr(instance, 'get_agenda_title'): content_type = ContentType.objects.get_for_model(instance) try: Item.objects.get(object_id=instance.pk, content_type=content_type).delete() except Item.DoesNotExist: # Item does not exist so we do not have to delete it. pass