Python 该视图未返回 HttpResponse 对象。它返回 None 代替
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The view didn't return an HttpResponse object. It returned None instead
提问by aliteralmind
I have the following simple view. Why is it resulting in this error?
我有以下简单的看法。为什么会导致这个错误？
The view auth_lifecycle.views.user_profile didn't return an HttpResponse object. It returned None instead.
The view auth_lifecycle.views.user_profile didn't return an HttpResponse object. It returned None instead.
"""Renders web pages for the user-authentication-lifecycle project."""
from django.shortcuts import render
from django.template import RequestContext
from django.contrib.auth import authenticate, login
def user_profile(request):
"""Displays information unique to the logged-in user."""
user = authenticate(username='superuserusername', password='sueruserpassword')
login(request, user)
render(request, 'auth_lifecycle/user_profile.html',
context_instance=RequestContext(request))
采纳答案by aliteralmind
Because the view must returnrender, not just call it. Change the last line to
因为视图必须返回render，而不仅仅是调用它。将最后一行更改为
return render(request, 'auth_lifecycle/user_profile.html',
context_instance=RequestContext(request))
回答by Angie Alejo
I had the same error using an UpdateView
我在使用 UpdateView 时遇到了同样的错误
I had this:
我有这个：
if form.is_valid() and form2.is_valid():
form.save()
form2.save()
return HttpResponseRedirect(self.get_success_url())
and I solved just doing:
我解决了只做：
if form.is_valid() and form2.is_valid():
form.save()
form2.save()
return HttpResponseRedirect(reverse_lazy('adopcion:solicitud_listar'))
回答by Ravi Teja Mureboina
if qs.count()==1:
print('cart id exists')
if ....
else:
return render(request,"carts/home.html",{})
Such type of code will also return you the same error this is because of the intents as the return statement should be for else not for if statement.
这种类型的代码也会向您返回相同的错误，这是因为 return 语句应该用于 else 而不是用于 if 语句的意图。
above code can be changed to
上面的代码可以改成
if qs.count()==1:
print('cart id exists')
if ....
else:
return render(request,"carts/home.html",{})
This may solve such issues
这可能会解决此类问题
