如何在views.py中调用django自定义编写的AuthenticationBackend的authenticate()方法？

Question

我正在开发一个 Django 项目，在该项目中我定义了一个自定义用户模型，我需要为其编写自定义身份验证方法，按照我编写的文档，如下所示，但我在视图中调用它时遇到问题。 py请通过查看以下代码来帮助我
我已经定义了我的自定义后端，如下所示
我的自定义身份验证后端

from django.contrib.auth.backends import BaseBackend
from .models import User
from IntellerMatrix.CommonUtilities.constants import Constants


class AuthenticationBackend(BaseBackend):
    """
    Authentication Backend
    :To manage the authentication process of user
    """

    def authenticate(self, email=None, password=None):
        user = User.objects.get(email=email)
        if user is not None and user.check_password(password):
            if user.is_active == Constants.YES:
                return user
            else:
                return "User is not activated"
        else:
            return None

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

设置.py

AUTHENTICATION_BACKENDS = ['Modules.users.authentication.AuthenticationBackend',
                           'django.contrib.auth.backends.ModelBackend', ]

视图.py

def login(request):
    email = 'ialihaider75@gmail.com'
    password = 'ali'
    user = # how to call here that custom authentication backend's authenticate method

    if user is None:
        return HttpResponse("<p>Not Valid</p>")
    else:
        return HttpResponse(user)

Answer 1

您可以调用该authenticate(..)函数[Django-doc]

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用于authenticate()验证一组凭据。它将凭据作为关键字参数，username对于password默认情况，根据每个身份验证后端检查它们User，如果凭据对于后端有效，则返回一个对象。所以：

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from django.contrib.auth import authenticate\n\ndef login(request):\n    email = \'ialihaider75@gmail.com\'\n    password = \'ali\'\n    user = authenticate(request, email=email, password=password)\n\n    if user is None:\n        return HttpResponse(\'<p>Not Valid</p>\')\n    else:\n        return HttpResponse(user)

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请注意，您实现的身份验证方法不能返回字符串。正如编写身份验证后端的文档所述：

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（……）

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无论哪种方式，authenticate()都应该检查它获取的凭据，如果凭据有效，则返回与这些凭据匹配的用户对象。如果它们\xe2\x80\x99 无效，则应返回None。

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class AuthenticationBackend(BaseBackend):\n    """\n    Authentication Backend\n    :To manage the authentication process of user\n    """\n\n    def authenticate(self, request, email=None, password=None):\n        try:\n            user = User.objects.get(email=email)\n        except User.DoesNotExist:\n            return None\n        if user is not None and user.check_password(password):\n            if user.is_active == Constants.YES:\n                return user\n        return None

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此外，这不会登录您的使用，这只是检查凭据是否有效。所以如果你想登录用户仍然需要调用login(..)函数[Django-doc] 。

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