-# -*- coding: utf-8 -*-
-# This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
-# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
-#
-from django.db import models
-from django.db.models.signals import pre_delete
-
-from catalogue.models import Book, Tag
-
-
-class Deleted(models.Model):
- object_id = models.IntegerField()
- type = models.CharField(max_length="50", db_index=True)
- created_at = models.DateTimeField(editable=False, db_index=True)
- deleted_at = models.DateTimeField(auto_now_add=True, db_index=True)
-
- class Meta:
- unique_together = (('type', 'object_id'),)
-
-
-
-def _pre_delete_handler(sender, instance, **kwargs):
- """ save deleted objects for change history purposes """
-
- if sender in (Book, Tag):
- Deleted.objects.create(type=sender.__name__, object_id=instance.id, created_at=instance.created_at)
-pre_delete.connect(_pre_delete_handler)