HttpResponse对象误差

Question

我得到了的错误视图registration.views.login没有返回HttpResponse对象.

我正在制作一个登录应用程序，我希望当我点击登录按钮时，主页会显示给我。

当我按照给定的方式运行view.py时，我将得到页面未找到的错误

from django.template import  loader
from django.shortcuts import render
from registration.models import Registration
from django.http import HttpResponse
from django.template import RequestContext


def login(request):
    t = loader.get_template('registration/login.html')

    return render(request, 'registration/login.html')

urls.py文件如下所示：

from django.conf.urls import patterns, include, url
from django.contrib import admin
admin.autodiscover()

    urlpatterns = patterns('',
        url(r'^polls/$', 'polls.views.index'),
        url(r'^polls/(?P<poll_id>\d+)/$', 'polls.views.detail'),
        url(r'^polls/(?P<poll_id>\d+)/results/$', 'polls.views.results'),
        url(r'^polls/(?P<poll_id>\d+)/vote/$', 'polls.views.vote'),
        url(r'^admin/', include(admin.site.urls)),
        url(r'^registration/$', 'registration.views.login'),

当我试图以以下方式运行view.py时：

from django.template import  loader
from django.shortcuts import render
from registration.models import Registration
from django.http import HttpResponse
from django.template import RequestContext

def login(request):
   t = loader.get_template('registration/login.html')
   if request.method == "POST":
    username = request.POST['user_name']
    password = request.POST['password']
    user = authenticate(username=username, password=password)
    if user is not None:
      if user.is_active:
        login(request, user)
        # success
        return render_to_response(request,'registration/login.html')

然后我得到了错误视图registration.views.login没有返回HttpResponse对象。

Answer 1

您不需要在每个方法中加载模板；django将为您处理这个问题。Django要求从urls.py调用所有方法，返回一个HttpResponse对象。

您的方法有很多条件，无法到达返回语句。例如，如果用户没有活动怎么办？如果请求不是POST怎么办？

尝试此版本，如果任何条件失败，该版本将用户重定向回注册页面：

def login(request):
   # t = loader.get_template('registration/login.html') - not needed
   if request.method == "POST":
    username = request.POST.get('user_name')
    password = request.POST.get('password')
    user = authenticate(username=username, password=password)
    if user is not None:
      if user.is_active:
        login(request, user)
        # success
        return render(request,'registration/login.html')
      else:
        # user was not active
        return redirect('registration/')
    else:
        # not a valid user
        return redirect('registration/')
   else:
       # URL was accessed directly
       return redirect('registration/')

Answer 2

样品量

view.py

def loginto(request):
    if request.method == "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)
           return render_to_response('index1.html')
        else:
           return render_to_response('error1.html')
        else:
        return render_to_response('error2.html') 
    else:
        return render_to_response('error2.html')

url.py

url(r'^login', 'mytests.views.loginto', name='loginto'),

login.html

<form method="POST" action="{% url loginto %}">
  Username: <input type="text" name="username" size="15" /><br />
  Password: <input type="password" name="password" size="15" /><br />
  <div align="center">
    <p><input type="submit" value="Login" /></p>
  </div>
</form>