Replace UUID field content back to default null

Question

Using Django==2.2.27, and Postgres

I have a Model, with a UUID field:

from django.db import models

class MyModel(models.Model):
  uuid_field = models.UUIDField(
    blank=True,
    db_index=True,
    null=True,
  )

I need to delete the field (column) content for some objects (rows) - but when I try:

my_object.uuid_field = None
my_object.save()

I get this error:

ValidationError: ["'None' is not a valid UUID."]

^ That makes sense, since the value is definitely not a UUID: link

A bit more explanation:

1. I can create objects without populating the uuid_field so it stays null
2. I will most likely populate the uuid_field
3. I might need to delete the uuid_field content
4. I cannot change the UUIDField to a char field or anything else

Is there a way to get the field back to its default null using Django ORM?
Thank you!

Answer 1

The non Django ORM solution I have is as such:

from django.db import connection

with connection.cursor() as cursor:
  cursor.execute("UPDATE mymodelapp_mymodel SET uuid_field = null WHERE id = %s", [<MyModel id, int>])

I would love to get an ORM solution.

One thing I can do is to override models.UUIDField and customize it to behave as I would expect it to - but I am open to other ideas