Сигнали в Django

Простенький приклад. При створенні об'єкту моделі, необхідно в автоматично створити об'єкт в сусідній моделі.

class Task(models.Model):
    name = models.CharField(max_length=120)
    description = models.TextField()
    price = models.CharField(max_length=5)
    promotional_code = models.CharField(max_length=24)
    city = models.CharField(max_length=24)
    is_active = models.BooleanField(default=True)
    buyer = models.ForeignKey(User)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)
    def __unicode__(self):
        return self.name

class TaskStatus(models.Model):
    POSTED, ASSIGNED, COMPLETED, CLOSED = range(1,5)
    TASK_STATUS_VALUES = (
        (POSTED, 'Posted'),
        (ASSIGNED, 'Assigned'),
        (COMPLETED, 'Completed'),
        (CLOSED, 'Closed'),
    )
    task = models.ForeignKey(Task)
    task_status = models.IntegerField(choices=TASK_STATUS_VALUES, blank=True, null=True)
    provider = models.ForeignKey(User, blank=True, null=True)
    created_at = models.DateTimeField(auto_now_add=True)

def update_task_status(sender, instance, *args, **kwargs):
    TaskStatus.objects.create(task=instance, task_status=1)

models.signals.post_save.connect(update_task_status, sender=Task)