无法解析？next =来自http:// login /？next =/my_page /使用request.GET.get('next','')的值

Question

我有一个自定义登录URL /视图/模板.我将@login_required装饰器用于需要登录的页面(我们称之为my_page).试图访问

my_site.com/my_page 

正确的电话

my_site.com/login/?next=/my_page/ 

但我的视图无法解析？next =/my_page/my的值,而是总是重定向到我的默认值,即/ qa /在我的视图中:

def login_with_email(request):
    error = ''
    if request.method == 'POST':
        if not request.POST.get('email', ''):
            error = 'Please enter your email and password'
        if not request.POST.get('password', ''):
            error = 'Please enter your email and password'    
        if not error:    
            email = request.POST['email']
            password = request.POST['password']

            try:
                user = User.objects.get(email=email)
                user = authenticate(username=user.username, password=password)
                if user is not None:
                    if user.is_active:
                        login(request, user)

                        # *** 
                        next_page = request.GET.get('next', '/qa/')
                        response = HttpResponseRedirect(next_page)
                        # ***

                        response.set_cookie('login_email', email, max_age=14*24*60*60)
                        return response
            except User.DoesNotExist:    
                error = 'Invalid email and password combination'

Urls.py:

url(r'^login/$', views.login_with_email), 

Answer 1

根据我下面的评论，我意识到我必须在 POST 处理之前从 url 中获取 next 的值（感谢@Anentropic 在灯泡上闪烁）。所以现在我获取 next 的值，将其传递到我的模板，我将其存储在隐藏字段中，最后在需要重定向时使用 request.POST.get 访问它：

修改后的视图：

def login_with_email(request):
    error = ''
    next = request.GET.get('next', '/qa/profile/private/')
    if request.method == 'POST':
    ...
                if user.is_active:
                    login(request, user)
                    next = request.POST.get('next', '/qa/profile/private/')
                    ...    
    return render(request, 'qa/login_with_email.html', {'error': error, 'login_email': login_email, 'next': next,})

在我的模板中：

<form method="post" action="." autocomplete="on">{% csrf_token %} 
    <p><input type="hidden" name="next" value="{{ next }}"/></p>
    ...

注：此答案最初由问题提出者发布。我刚刚把它搬到这里了。