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

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在重写用户模型时报错：AttributeError: type object ‘UserProfile’ has no attribute ‘USERNAME_FIELD’

models.py - 新建用户模型UserProfile继承自AbstractBaseUser

1# -*- encoding:utf-8 -*-
2
3from __future__ import unicode_literals
4from django.db import models
5from django.contrib.auth.models import AbstractBaseUser
6# Create your models here.
7
8
9class UserProfile(AbstractBaseUser):
10
11    nick_name = models.CharField(max_length=50, verbose_name=u"昵称", default="")
12    birday = models.DateField(verbose_name=u"生日", null=True, blank=True)
13    gender = models.CharField(max_length=5, choices=(("male", u"男"),("female",u"女")), default="female")
14    address = models.CharField(max_length=100, default=u"")
15    mobile = models.CharField(max_length=11, null=True, blank=True)
16    image = models.ImageField(upload_to="image/%Y/%m", default=u"image/default.png", max_length=100)
17
18    class Meta:
19        verbose_name = u"用户信息"
20        verbose_name_plural = verbose_name
21
22    def __unicode__(self):
23        return self.username1234567891011121314151617181920212223

settings.py中也设置了AUTH_USER_MODEL

1INSTALLED_APPS = [
2    'django.contrib.admin',
3    'django.contrib.auth',
4    'django.contrib.contenttypes',
5    'django.contrib.sessions',
6    'django.contrib.messages',
7    'django.contrib.staticfiles',
8    'mx_users',
9
10]
11
12AUTH_USER_MODEL = "mx_users.UserProfile"123456789101112

debug时报错：

AttributeError: type object 'UserProfile' has no attribute 'USERNAME_FIELD'1

最后google了一圈才发现解决办法： 答案还是得去官方文档中寻找 https://docs.djangoproject.com/en/1.9/topics/auth/customizing/ 在模型中新增两行代码，即可解决

1    identifier = models.CharField(max_length=40, unique=True)
2    USERNAME_FIELD = 'identifier'12

如下：

1class UserProfile(AbstractBaseUser):
2    identifier = models.CharField(max_length=40, unique=True)
3    USERNAME_FIELD = 'identifier'
4
5    nick_name = models.CharField(max_length=50, verbose_name=u"昵称", default="")
6    birday = models.DateField(verbose_name=u"生日", null=True, blank=True)
7    gender = models.CharField(max_length=5, choices=(("male", u"男"),("female",u"女")), default="female")
8    address = models.CharField(max_length=100, default=u"")
9    mobile = models.CharField(max_length=11, null=True, blank=True)
10    image = models.ImageField(upload_to="image/%Y/%m", default=u"image/default.png", max_length