django: must be a User Instance when trying to save, but it is!

Question

Im sure this is probably a simple answer, but I cannot see anything wrong with this!

Im just trying to save a record, and its saying Cannot assign "<User: jason.kinnear>": "Confirmation.user" must be a "User" instance.

This is the code:

u = User.objects.get(pk=18)    
cr = Confirmation(details='...', user=u).save()

Thanks in advance

EDIT: Model Definition for Confirmation

class Confirmation(models.Model):
    number = models.IntegerField(null=True, blank=True)
    user = models.ForeignKey('User')
    details = models.CharField(max_length=250)
    time = models.DateTimeField(auto_now_add=True)

I have tried both

user = models.ForeignKey('User')

and

user = models.ForeignKey(User)

Im not too sure of the difference to be honest

EDIT 2: The User class has been extended like this:

from django.contrib.auth.models import User as BaseUser
class User(BaseUser):
    """Extra user information"""    
    location = models.ForeignKey('Location', null=True, blank=True)
    defaults = models.CharField(null=True, blank=True)

Yeah sorry, thats that I mean. User 18 is User jason.kinnear — neolaser, Dec 20 '10 at 03:48
ok...im not quite sure what you mean then. Thanks for your patience though :) — neolaser, Dec 20 '10 at 03:59
The code provided works for me. If its causing a ValueError, then are you overriding the User class? Also, providing details as for your Django and python versions is always advisable. — sidhshar, Dec 20 '10 at 04:52
ok, thanks for the advice Sidharth. I have edited the question with how I have extended the User class. — neolaser, Dec 20 '10 at 04:57
It's sounding more and more like they're not the same `User`. — Ignacio Vazquez-Abrams, Dec 20 '10 at 05:12
Thanks for your interest Ignacio, but I still dont understand what you mean by not the same User... — neolaser, Dec 20 '10 at 05:15
ahh ok. Thankyou Ignacio! I was importing the wrong User (as they were both called 'User'). Thanks everybody for your input! — neolaser, Dec 20 '10 at 05:57

score 0 · Accepted Answer · answered Dec 30 '10 at 01:36

Just so this question has an answer, Ignacio was correct (in the comments). The imported User was not the same. The Django User was extended with another User class and I was importing the wrong one. (Ignacio, if you would like to post an answer I will make that the accepted answer)

django: must be a User Instance when trying to save, but it is!

1 Answers1

Linked