Django foreign key access in save() function

def save(self, **kwargs):
    super(Publisher, self).save(**kwargs)

    for item in self.item_set.all():
        item.code = "%s - whatever" % item.code

def save(self, **kwargs):
    super(Publisher, self).save(**kwargs)

    for item in self.item_set.all():
        item.code = "%s - whatever" % item.code