Django 给一个字段默认值 = pk

Question

I'm trying to give a field in Django a default value = value of pk, is this possible?

I've found an old question about giving a field default = value of another field but it doesn't really help when working with pk value: How do I set default field value to value of other field in a Django model?

Basicly is something like this possible using pk instead of "name" variable? :

class MyModel(models.Model):
name = models.CharField(max_length=50)
fullname = models.CharField(max_length=100,default=name)

def clean(self):
  self.fullname=name

Thanks.

Answer 1

Django creates auto primary keys, the model will have a field called "id" and it is also called "pk"

If you access your database you'll be able to see it.

If you want to set your own primary key you will need to do something like:

custompk = models.someField(primary_key=True)

As your question is vague I've attempted to answer to the best of my ability.

If you are trying to access a PK/ID of an object in a view let me know and I can help with that as well. :)