gistfile1.py

class Call(models.Model):
    call_at = models.DateTimeField()
    contestant = models.OneToOneField(Contestant)
    confirmed = models.BooleanField()
    
    def confirm(self):
        self.confirmed = True
        self.save()
    
    def save(self, *args, **kwargs):
        
        if not self.id:
            created = True
        
        call = super(Call, self).save(*args, **kwargs)
        
        if created:
            # Dispatch an SMS requesting confirmation that this phone
            # number is in fact the contestant's phone number.
            message = OutgoingSMS.objects.create(
                recipient = self.contestant.phone_number,
                sender = 'Bademiljø',
                message = '-'
            )