使用Django 1.5(1, 5, 0, 'beta', 2)中的新可配置用户模型时,运行manage.py createsuperuser尝试设置所需字段的外键时出现以下错误:
AttributeError: 'NoneType'对象没有属性'_state'
由于我有一个fixtures/initial_data.yaml包含我需要的用户模型值,因此工作流程如下:
- 创建数据库
- python manage.py syncdb
- 回答“no”到问题您刚刚安装了Django的auth系统,这意味着您没有定义任何超级用户。 您现在要创建一个吗? (是/否)
- 从1个fixture(s)安装了14264个对象
- python manage.py createsuperuser
我尝试在导入固定数据之后创建超级用户,因此这不是City模型的空数据库表所引起的问题。
代码摘录,基于文档:
models.py
class City(models.Model):
city = models.CharField(max_length=70, help_text="City.")
state = models.CharField(max_length=2, help_text="State.")
class Meta:
ordering = ['city']
def __unicode__(self):
return "%s (%s)" % (self.city, self.state)
class PersonaManager(BaseUserManager):
[...]
def create_superuser(self, email, name, birthplace, password):
"""
Creates and saves a superuser with the given email, date of
birth and password.
"""
user = self.create_user(email,
password=password,
name=name,
birthplace=birthplace,
)
user.is_admin = True
user.save(using=self._db)
return user
class Person(AbstractBaseUser):
email = models.EmailField(
verbose_name='email address',
max_length=255,
unique=True,
db_index=True,
)
name = models.CharField(max_length=60)
birthplace = models.ForeignKey('myapp.City', related_name="person_birthplace")
is_active = models.BooleanField(default=True)
is_admin = models.BooleanField(default=False)
objects = PersonaManager()
USERNAME_FIELD = 'email'
REQUIRED_FIELDS = ['name', 'birthplace']
我该如何在用户模型的必填字段上使外键起作用?谢谢。
编辑: 从
manage.py createsuperuser --traceback
获得的跟踪信息:Traceback (most recent call last):
File "/home/asd/Envs/envdjango15/local/lib/python2.7/site-packages/django/core/management/base.py", line 222, in run_from_argv
self.execute(*args, **options.__dict__)
File "/home/asd/Envs/envdjango15/local/lib/python2.7/site-packages/django/core/management/base.py", line 252, in execute
output = self.handle(*args, **options)
File "/home/asd/Envs/envdjango15/local/lib/python2.7/site-packages/django/contrib/auth/management/commands/createsuperuser.py", line 112, in handle
user_data[field_name] = field.clean(raw_value, None)
File "/home/asd/Envs/envdjango15/local/lib/python2.7/site-packages/django/db/models/fields/__init__.py", line 211, in clean
self.validate(value, model_instance)
File "/home/asd/Envs/envdjango15/local/lib/python2.7/site-packages/django/db/models/fields/related.py", line 1014, in validate
using = router.db_for_read(model_instance.__class__, instance=model_instance)
File "/home/asd/Envs/envdjango15/local/lib/python2.7/site-packages/django/db/utils.py", line 142, in _route_db
return hints['instance']._state.db or DEFAULT_DB_ALIAS
AttributeError: 'NoneType' object has no attribute '_state'
AttributeError: 'NoneType' object has no attribute '_state'
ForeignKey('myapp.City'...
,ForeignKey(City...
不就足够了吗? - Jeewes