django重写authcenticate方法兼容用户、邮箱、密码认证登录

from django.contrib.auth.backends import ModelBackend
from django.contrib.auth import get_user_model
from django.db.models import Q

UserModel = get_user_model()

class CustomBackend(ModelBackend):
    '''手机、邮箱、用户三式登录认证'''
    def authenticate(self, request, username=None, password=None, **kwargs):
        '''重写authenticate'''
        username = request.POST.get('userid')
        password = request.POST.get('pwd')
        if username is None:
            username = kwargs.get(UserModel.USERNAME_FIELD)
        try:
            # user = UserModel._default_manager.get_by_natural_key(username) #用户登录
            user = UserModel._default_manager.filter(Q(username=username) | Q(mobile=username) | Q(email=username)).first() #兼容登录
        except UserModel.DoesNotExist:
            # Run the default password hasher once to reduce the timing
            # difference between an existing and a non-existing user (#20760).
            UserModel().set_password(password)
        else:
            if user.check_password(password) and self.user_can_authenticate(user):
                return user

settings.py配置：

AUTHENTICATION_BACKENDS = (
    'user.custom.CustomBackend',
)