# 关于设置AUTH_USER_MODEL出现的问题

关于设置AUTH_USER_MODEL出现的问题

在运行的时候出现了一个bug：

AttributeError: type object ‘UserProfile’ has no attribute 'USERNAME_FIELD’

网上提供的解决方案是：在user.models里面添加：

Django重写用户模型报错has no attribute 'USERNAME_FIELD'

identifier = models.CharField(max_length=40, unique=True)
USERNAME_FIELD = 'identifier'

但这样出现的问题是：identifier不是我们要设置的量。同时在创建超级用户时，添加完成identifier就出现警告！

在寻找解决方案发现，缺少了

http://www.it1352.com/636287.html

 objects = UserManager（）

运行之后，虽然可以设置密码了，但是邮箱设置，昵称设置依然无效；

以下代码是通过查找“USERNAME_FIELD”关键字，在程序里面找到的代码；

class AbstractUser(AbstractBaseUser, PermissionsMixin):
    """
    An abstract base class implementing a fully featured User model with
    admin-compliant permissions.
    Username and password are required. Other fields are optional.
    """
    username_validator = UnicodeUsernameValidator()
    username = models.CharField(
        _('username'),
        max_length=150,
        unique=True,
        help_text=_('Required. 150 characters or fewer. Letters, digits and @/./+/-/_ only.'),
        validators=[username_validator],
        error_messages={
            'unique': _("A user with that username already exists."),
        },
    )
    first_name = models.CharField(_('first name'), max_length=30, blank=True)
    last_name = models.CharField(_('last name'), max_length=150, blank=True)
    email = models.EmailField(_('email address'), 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()
    EMAIL_FIELD = 'email'
    USERNAME_FIELD = 'username'
    REQUIRED_FIELDS = ['email']
    class Meta:
        verbose_name = _('user')
        verbose_name_plural = _('users')
        abstract = True
    def clean(self):
        super().clean()
        self.email = self.__class__.objects.normalize_email(self.email)
    def get_full_name(self):
        """
        Return the first_name plus the last_name, with a space in between.
        """
        full_name = '%s %s' % (self.first_name, self.last_name)
        return full_name.strip()
    def get_short_name(self):
        """Return the short name for the user."""
        return self.first_name
    def email_user(self, subject, message, from_email=None, **kwargs):
        """Send an email to this user."""
        send_mail(subject, message, from_email, [self.email], **kwargs)
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问题找到，添加的类出错。在视频讲解中继承的类是“AbstractUser”，而我使用的类是“AbstractBaseUser”。继承出错了！