I find myself in this situation:

In models:

class Client(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    # other...

signals.py:

@receiver(post_save, sender=User)
def create_user_profile(sender, instance, created, **kwargs):
    if created:
        Client.objects.create(user=instance)

@receiver(post_save, sender=User)
def save_user_profile(sender, instance, **kwargs):
        instance.client.save()

There are specific fields of the Client class that cannot be null and therefore I get errors like:

NOT NULL constraint failed: accounts_client.dob

What is the best solution in this case?

CodePudding user response：

The obvious answer is to just make sure that data is being passed to those fields to ensure the non-null constraint doesn't fail. As to how you do that, the easiest way is to set a default value on your field - this default doesn't necessarily need to be a fixed value, it can accept a callable function - however, it will not have the context of the object you are creating. To do that, you would need to override the save() method.