Python - Django - activate（）返回None

好的，所以我正在尝试用Django创建一个登录 .

来自views.py：

from django.shortcuts import *
from forms import UserRegistrationForm
from django.contrib.auth import authenticate, login
from django.core.mail import send_mail
from django.conf import settings
import pprint
import utils
import models
from django.http import HttpResponse
import views
from django.conf.urls import patterns, url    

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

    if request.POST:
        username = request.POST.get('username')
        password = request.POST.get('password')

        user = authenticate(username=username, password=password)

        if user is not None:
            if not user.is_verified:
                state = "Please check your e-mail to verify your account."
            elif user.is_active:
                login(request, user)
                state = "You're successfully logged in!"
            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('myapp/dashboard.html', {'state': state}, RequestContext(request))

    else:
        return render_to_response('myapp/login.html', RequestContext(request))

我的登录模板（login.html）：

<h3>Login</h3><hr />

            <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 }}" />

                password:
                <input type="password" name="password" value="" />


                <input class="btn" type="submit" value="Log In" />
            </form>

我正在使用一个基本的SQLite3来解决所有问题 . python manage.py syncdb运行没有问题

来自settings.py：

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': 'tempDB'
    }
}

当我登录我的管理站点时，我看到用户：

username：nick密码：nick的哈希版本

当我插入一个中断（使用PBD）时，我能够看到应用程序通过login_user视图 .

> ...myapp/myapp/views.py(52)login_user()
-> state = "Please log in below..."
(Pdb) n
> ...myapp/myapp/views.py(53)login_user()
-> username = password = ''
(Pdb) print username
*** NameError: name 'username' is not defined
(Pdb) n
> ...myapp/myapp/views.py(55)login_user()
-> if request.POST:
(Pdb) print username

(Pdb) n
> ...myapp/myapp/views.py(56)login_user()
-> username = request.POST.get('username')
(Pdb) print username

(Pdb) n
> ...myapp/myapp/views.py(57)login_user()
-> password = request.POST.get('password')
(Pdb) print username
nick
(Pdb) n
> ...myapp/myapp/views.py(59)login_user()
-> user = authenticate(username=username, password=password)
(Pdb) print password
nick
(Pdb) n
> ...myapp/myapp/views.py(61)login_user()
-> if user is not None:
(Pdb) print user
None

这表明它获取了用户名'nick'和密码'nick'（我设置帐户的设置）但是我遇到的问题是authenticate仍然返回None，这意味着SOMETHING没有正确设置/是不工作

在login_user视图之后，'state'打印出“您的用户名和/或密码不正确” . 正如在views.py中所做的那样

如果有人能够帮助我，我将不胜感激！