Reload django object from database

Question

Is it possible to refresh the state of a django object from database? I mean behavior roughly equivalent to:

new_self = self.__class__.objects.get(pk=self.pk         


        

Answer 1

In reference to @grep's comment, shouldn't it be possible to do:

# Put this on your base model (or monkey patch it onto django's Model if that's your thing)
def reload(self):
    new_self = self.__class__.objects.get(pk=self.pk)
    # You may want to clear out the old dict first or perform a selective merge
    self.__dict__.update(new_self.__dict__)

# Use it like this
bar.foo = foo
assert bar.foo.pk is None
foo.save()
foo.reload()
assert bar.foo is foo and bar.foo.pk is not None