我在我的用户模型中使用 Django 1.5（带有 python3），用户模型与南有中间值，我执行 syncdb 并且迁移良好，但是当我执行 createsuperuser 时出现此错误：
NameError: global name 'username' is not defined
我的用户模型是：
from django.db import models
from django.contrib.auth.models import AbstractBaseUser, PermissionsMixin, BaseUserManager
from django.utils.translation import ugettext_lazy as _
from django.utils import timezone
from django.core.mail import send_mail
from django.contrib.auth.signals import user_logged_in
def update_last_login(sender, user, **kwargs):
"""
A signal receiver which updates the last_login date for
the user logging in.
"""
user.last_login = timezone.now()
user.save(update_fields=['last_login'])
user_logged_in.connect(update_last_login)
class UserManager(BaseUserManager):
def _create_user(self, email, password,
is_staff, is_superuser, **extra_fields):
"""
Creates and saves a User with the given email and password.
"""
now = timezone.now()
if not email:
raise ValueError('The given email must be set')
email = self.normalize_email(email)
user = self.model(email=email,
is_staff=is_staff, is_active=True,
is_superuser=is_superuser, last_login=now,
date_joined=now, **extra_fields)
user.set_password(password)
user.save(using=self._db)
return user
def create_user(self, email, password=None, **extra_fields):
return self._create_user(email, password, False, False,
**extra_fields)
def create_superuser(self, email, password, **extra_fields):
return self._create_user(username, email, password, True, True,
**extra_fields)
class User(AbstractBaseUser, PermissionsMixin):
email = models.EmailField(_('email address'), max_length=254,
unique=True, db_index=True, blank=True)
is_staff = models.BooleanField(_('staff status'), default=False,
help_text=_('Designates whether the user can log into this admin '
'site.'))
is_active = models.BooleanField(_('active'), default=True,
help_text=_('Designates whether this user should be treated as '
'active. Unselect this instead of deleting accounts.'))
date_joined = models.DateTimeField(_('date joined'), default=timezone.now)
objects = UserManager()
USERNAME_FIELD = 'email'
REQUIRED_FIELDS = []
class Meta:
verbose_name = _('user')
verbose_name_plural = _('users')
def get_full_name(self):
return getattr(self, self.USERNAME_FIELD)
def get_short_name(self):
return getattr(self, self.USERNAME_FIELD)
def email_user(self, subject, message, from_email=None, **kwargs):
"""
Sends an email to this User.
"""
send_mail(subject, message, from_email, [self.email], **kwargs)
def __str__(self):
return self.email
def __unicode__(self):
return self.email
我不知道我在代码中遇到的错误。