Question

提交表单时出现问题。几天前它工作了，我在这段代码中没有改变，但现在它失败了。是否有可能不同的模块使该部分代码崩溃？回溯：

环境：

Request Method: POST
Request URL: http://127.0.0.1:8000/users/new/

Django Version: 1.7.3
Python Version: 3.4.0
Installed Applications:
('django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'mojblog',
 'users')
Installed Middleware:
('django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware')


Traceback:
File "/home/marta/django/djangovenv/lib/python3.4/site-packages/django/core/handlers/base.py" in get_response
  130.                                  % (callback.__module__, view_name))

Exception Type: ValueError at /users/new/
Exception Value: The view users.views.create didn't return an HttpResponse object. It returned None instead.

代码：

from django.shortcuts import render, redirect
from django.http import HttpResponse
from users.forms import UserCreationForm
from django.contrib.auth.models import User
from users.models import Profile


def test(request):
    return HttpResponse('users!')


def create(request):
    if request.method =="POST":
        new_user=User()
        form = UserCreationForm(request.POST, instance=new_user)
        if form.is_valid():
            new_user=form.save(commit=False)
            new_user.is_active=False
            new_user.save()
            return redirect("users:new")

    else:
        form = UserCreationForm()
        return render(request, 'users/create.html', {'form1': form})


    # else:
    #   return HttpResponse("something")        

def activate(request, key):

    profile=Profile.objects.get(secret=key)
    user=profile.user
    user.is_active=True
    user.save()



    return render(request, 'users/activate.html', {})

Answer 1

在create视图中，如果请求是POST但表单无效，则代码不会返回任何内容。

不应该使用单独的GET块，而应使用标准模式：

if request.method =="POST":
    form = ...
    if form.is_valid():
        ...
        return redirect(...)
else:
    form = ...
return render(request, 'users/create.html', {'form1': form})

在这种情况下，最终的返回捕获该情况，并重新呈现表单，以便显示错误。

该视图未返回HttpResponse对象。它返回了None。请求方法：POST

1 个答案: