class AttributesSorting(models.Model):

    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, verbose_name=_('User'))
    attribute_id = models.ManyToManyField(AddressBookAttribute)
    visible = models.BooleanField(verbose_name=_('Visible'), blank=False, null=False, default=True,_('visible text'))
    sorting_index = models.PositiveIntegerField(verbose_name=_('Sort Index'), validators=[MinValueValidator(1)])