自定义身份验证后端。 Django的 [英] Custom authentication backend. Django

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问题描述

我想创建一个身份验证后端,该后端仅允许用户使用电子邮件登录(无用户名,无密码)。



这是我尝试过的。 / p>

backends.py:

 来自django.conf导入设置$ b来自django.contrib.auth.models的$ b导入用户

类EmailAuthBackend(object):
def authenticate(self,username = None,password = None):
试试:
用户= User.objects.get(电子邮件=用户名)
如果用户:
返回用户
,但User.DoesNotExist除外:
返回None

settings.py:

  AUTHENTICATION_BACKENDS =(
'path_to.backends.EmailAuthBackend',
'django.contrib.auth.backends.ModelBackend',

html:

 < form method = post action = {%url myproject.views.test%}> 
{%csrf_token%}

<输入类型= text name =电子邮件 value = />

< button type = submit> Valider< / button>

< / form>

视图:

  def test(request):
email =''
如果请求中有'email'.POST:
email = request.POST.get('email')
如果不是User.objects.filter(email = email):
User.objects.create(email = email)
user = authenticate(username = email)
如果user不为None :
if user.is_active:
auth_login(请求,用户)
return HttpResponseRedirect(reverse('home'))

它不起作用,用户未通过身份验证。而且,当我转到/ admin时,也会遇到此错误:

  AttributeError在/ admin / logout / 
' EmailAuthBackend'对象没有属性'get_user'


解决方案

自定义后端,您需要指定 get_user 函数。请参阅文档 get_user 实现可以简单地使用现有的User表,就像您这样:

  def get_user(self,user_id):
尝试:
返回User.objects.get(pk = user_id)
除了User.DoesNotExist:
返回None

之所以需要这样做,是因为在某些情况下,您需要通过用户主键从其他来源获取用户


I would like to create an authentication backend that allows users to log_in only using their email (no username, no password).

Here is what I tried.

backends.py:

from django.conf import settings
from django.contrib.auth.models import User

class EmailAuthBackend(object):    
    def authenticate(self, username=None, password=None):
        try:
            user = User.objects.get(email=username)
            if user:
                return user
        except User.DoesNotExist:
            return None 

settings.py:

  AUTHENTICATION_BACKENDS = (
       'path_to.backends.EmailAuthBackend',
       'django.contrib.auth.backends.ModelBackend',
      )

html:

   <form  method="post" action="{% url myproject.views.test %}">
    {% csrf_token %}

        <input type="text" name="email" value=""/>

    <button type="submit">Valider</button>

    </form>

view:

 def test(request):
    email = ''
    if 'email' in request.POST:
        email = request.POST.get('email')
        if not User.objects.filter(email=email):
            User.objects.create(email=email)
        user = authenticate(username=email)
        if user is not None:
            if user.is_active:
                auth_login(request, user)
    return HttpResponseRedirect(reverse('home'))

It doesn't work, the user is not authenticated. And I also have this error when I go to the /admin:

    AttributeError at /admin/logout/
    'EmailAuthBackend' object has no attribute 'get_user'

解决方案

For each custom backend in Django, you need to specify the get_user function. See the documentation. The get_user implementation can simply use the existing User table, like you are:

    def get_user(self, user_id):
       try:
          return User.objects.get(pk=user_id)
       except User.DoesNotExist:
          return None

The reason this is required is for situations where you'd need to fetch the User via its primary key from a different source.

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