About the Default UUID Value
If you give a UUIDField a default value, you lose the simple way to tell in templates whether an object is new or already saved, because the id is created as soon as the instance is initialized. One way around this is to override the save() method:
class MyModel(models.Model):
id = models.UUIDField(primary_key=True, default=None)
def save(self, *args, **kwargs):
if not self.pk:
self.pk = uuid.uuid4()
super().save(*args, **kwargs)
Then you can check the state of the object in the template by the existence of pk:
<h1>{% if obj.pk %}{{ obj.title }}{% else %}New Object{% endif %}</h1>
Tips and Tricks Programming Development Django 6.x Django 5.2 Django 4.2 Python 3
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