登录后django重定向不起作用next不发布

我有一个登录页面，除了重定向到推荐人页面外，它工作正常.用户在应用程序中收到一封带有直接链接的邮箱，他们(在本例中)尚未登录，并被重定向到登录页面.成功登录后，用户将被重定向到硬编码路径.见下面的例子.

邮箱中的URL:http://localhost:8000/issueapp/1628/view/22

登录页面的URL:http://localhost:8000/login?next=/issueapp/1628/view/22

登录视图(带有硬编码重定向):

def login_user(request):    
    state = "Please log in below..."
    username = password = ''

    if request.POST:
        username = request.POST['username']
        password = request.POST['password']

        user = authenticate(username=username, password=password)
        if user is not None:
            if user.is_active:
                login(request, user)
                state = "You're successfully logged in!"
                return HttpResponseRedirect('/issueapp/1628/')
            else:
                state = "Your account is not active, please contact the site admin."
        else:
            state = "Your username and/or password were incorrect."

    return render_to_response(
        'account_login.html',
        {
        'state':state,
        'username': username
        },
        context_instance=RequestContext(request)
    )

登录视图(带有"下一步"重定向):

def login_user(request):    
    state = "Please log in below..."
    username = password = ''

    if request.POST:
        username = request.POST['username']
        password = request.POST['password']

        user = authenticate(username=username, password=password)
        if user is not None:
            if user.is_active:
                login(request, user)
                state = "You're successfully logged in!"
                return HttpResponseRedirect(request.GET['next'])
            else:
                state = "Your account is not active, please contact the site admin."
        else:
            state = "Your username and/or password were incorrect."

    return render_to_response(
        'account_login.html',
        {
        'state':state,
        'username': username
        },
        context_instance=RequestContext(request)
    )

上述视图导致异常"Key 'next' not found in <QueryDict: {}>"表单似乎没有张贴"NEXT"变量，即使它在URL和表单中. 我到处找了又找，都想不出为什么不管用.有什么主意吗？

Additional reference:个

登录模板:

{% block content %}

    {{ state }}
    <form action="/login/" method="post" >
                {% csrf_token %}
        {% if next %}
        <input type="hidden" name="next" value="{{ next }}" />
        {% endif %}
        username:
        <input type="text" name="username" value="{{ username }}" /><br />
        password:
        <input type="password" name="password" value="" /><br />

        <input type="submit" value="Log In"/>

        {% debug %}
    </form>
{% endblock %}

EDIT: The below is the code which is now working for me (thanks to the help of Paulo Bu)! **

登录视图:

def login_user(request):

    state = "Please log in below..."
    username = password = ''

    next = ""

    if request.GET:  
        next = request.GET['next']

    if request.POST:
        username = request.POST['username']
        password = request.POST['password']

        user = authenticate(username=username, password=password)
        if user is not None:
            if user.is_active:
                login(request, user)
                state = "You're successfully logged in!"
                if next == "":
                    return HttpResponseRedirect('/issueapp/')
                else:
                    return HttpResponseRedirect(next)
            else:
                state = "Your account is not active, please contact the site admin."
        else:
            state = "Your username and/or password were incorrect."

    return render_to_response(
        'account_login.html',
        {
        'state':state,
        'username': username,
        'next':next,
        },
        context_instance=RequestContext(request)
    )

登录模板:

{{ state }}

{% if next %}
<form action="/login/?next={{next}}" method="post" >
{%else%}
<form action="/login/" method="post" >
{% endif %}

            {% csrf_token %}

    username:
    <input type="text" name="username" value="{{ username }}" /><br />
    password:
    <input type="password" name="password" value="" /><br />

    <input type="submit" value="Log In"/>

    {% debug %}
</form>