Python Django ModelBackend.authenticate如何工作？

我正在调查这件事

我很困惑

其中调用了

authenticate（）

将

用户名

和

密码

传递给

authenticate（）

的是什么

有时，代码可以工作，但我不知道它是如何工作的

更新

我正在阅读一个项目的源代码。我找到了

authenticate（）

的定义，但找不到它的调用位置

grep -r "authenticate" .

./src/myproject/views.py:   if request.user.is_authenticated():
./src/lib/backend.py:   def authenticate(self, username = None, password = None, **kwargs):
./src/lib/middleware.py:        if not request.user.is_authenticated():
./src/lib/decorators.py:        if request.user.is_authenticated():

authenticate（）

如果您的项目或应用程序实现了登录表单，那么您或用于身份验证的应用程序的开发人员将调用
authenticate（）

例如，如果您有一个带有
username
和
password
字段的登录表单，那么您可以在
post（）
方法中调用
authenticate（username，password）

比如,

if request.method == 'POST':
    # Gather the username and password provided by the user.
    # This information is obtained from the login form.
    username = request.POST['username']
    password = request.POST['password']

    # Use Django's machinery to attempt to see if the username/password
    # combination is valid - a User object is returned if it is.
    user = authenticate(username=username, password=password)
    # If we have a User object, the details are correct.
    # If None (Python's way of representing the absence of a value), no user
    # with matching credentials was found.
    if user:
        # Is the account active? It could have been disabled.
        if user.is_active:
            # If the account is valid and active, we can log the user in.
            # We'll send the user back to the homepage.
            login(request, user)
            return HttpResponseRedirect('/rango/')
        else:
            # An inactive account was used - no logging in!
            return HttpResponse("Your Rango account is disabled.")
    else:
        # Bad login details were provided. So we can't log the user in.
        print "Invalid login details: {0}, {1}".format(username, password)
        return HttpResponse("Invalid login details supplied.")

有关此代码的完整说明，请参阅，或者查看官方django网站上的
authenticate（）
Er，当您要验证用户身份时，可以调用它，并将用户名和密码传递给它。@DanielRoseman我正在阅读一个项目的源代码。我找到了authenticate（）的定义，但找不到它的调用位置。它是由您调用的。@DanielRoseman我仍然感到困惑。您可能正在使用Django提供的登录视图，该视图调用
authenticate（）
。这就解释了为什么在项目的源代码中找不到它。
if request.method == 'POST':
    # Gather the username and password provided by the user.
    # This information is obtained from the login form.
    username = request.POST['username']
    password = request.POST['password']

    # Use Django's machinery to attempt to see if the username/password
    # combination is valid - a User object is returned if it is.
    user = authenticate(username=username, password=password)
    # If we have a User object, the details are correct.
    # If None (Python's way of representing the absence of a value), no user
    # with matching credentials was found.
    if user:
        # Is the account active? It could have been disabled.
        if user.is_active:
            # If the account is valid and active, we can log the user in.
            # We'll send the user back to the homepage.
            login(request, user)
            return HttpResponseRedirect('/rango/')
        else:
            # An inactive account was used - no logging in!
            return HttpResponse("Your Rango account is disabled.")
    else:
        # Bad login details were provided. So we can't log the user in.
        print "Invalid login details: {0}, {1}".format(username, password)
        return HttpResponse("Invalid login details supplied.")