class Flat(models.Model):
    city = models.CharField(max_length=124, verbose_name='Гроод')
    address = models.CharField(max_length=150, verbose_name='Адрес')
    zip_code = models.PositiveIntegerField(verbose_name='Почтовый индекс')
    empty = models.BooleanField(default=True, verbose_name='Свободна:')
    photo = models.ImageField(upload_to="photos/%Y/%m/%d/", blank=True, verbose_name='Фото')

    def __str__(self):
        return self.address

    def get_absolute_url(self):
        return reverse('flat_detail', kwargs={"pk": self.pk})

    class Meta:
        verbose_name = 'Квартира'
        verbose_name_plural = 'Квартиры'
        ordering = ['-id']