关于post_save信号和创建的参数

Question

the docs says:

post_save
django.db.models.signals.post_save

created
A boolean; True if a -new- record was create.

and I have this:

from django.db.models.signals import post_save
def handle_new_user(sender, instance, created, **kwargs):
    print "--------> save() "+str(created)
post_save.connect(handle_new_user, sender=User)

when I do in shell:

u = User(username="cat")
u.save()
>>> --------> save() True
u.username = "dog"
u.save()
>>> --------> save() True

I expect a >>> --------> save() False when I save() the second time because is an update? not?

Answer 1

我建议您使用User.objects.create_user避免批量操作。

Answer 2

似乎您已经实现了自己的用户，而用户名没有唯一的限制？