Why doesn't update work in django?

Question

Django

there is a code

print self.bar
print baz(apply_date, n=1, include_today=False)
print Foo.objects.all().filter(id=self.id).update(
            bar=baz(apply_date, n=1, include_today=False))
print self.bar

which outputs

None
2014-02-01
1
None

What can be wrong?

Foo.objects.filter(id=self.id).update(
            bar=baz(apply_date, n=1, include_today=False))

also tried

Answer 1

Because update is gone, but nobody updated your current object. Judging by the response from the update, the change has occurred. It's just that now your current object is out of date and you need to request it again from the database so that it becomes relevant.