Problem using a related object in __repr__()

[jason]

Hi,

I am trying to use a related object's attribute as part of the __repr__() 
function, and am running into trouble.

from django.core import meta

class Foo(meta.Model):
    name = meta.CharField(maxlength=255)

    def __repr__(self):
        return self.name

    class META:
        admin = meta.Admin()


class Bar(meta.Model):
    name = meta.CharField(maxlength=255)
    foo = meta.ForeignKey(Foo)

    def __repr__(self):
        return self.name + " " + self.foo.name

    class META:
        admin = meta.Admin()


With this setup, I can create a Bar in the admin page, but when I hit 
"submit", it throws an exception.  Unfortunately the exception gets 
clobbered, but I added a quick one-liner hack to print it out before it gets 
clobbered, and this is the error:

'Bar' object has no attribute 'foo'

What am I missing?

Thanks,
Jason Pepas