Django表单字段验证错误

Question

当用户提交表单并引发ValidationError异常时，我正在尝试验证表单字段是否为None：

def clean_street_number(self):
    if self.cleaned_data['street_number'] is None:
        raise ValidationError(
            ('You forgot to write your street number')
        )
    else:
        return self.cleaned_data['street_number']

当我填写表格并提交没有街道号码时，Django崩溃并留言：

The view core.decorators.add_location didn't return an HttpResponse object. It returned None instead.

views.朋友

def add_property_location(request):
    if request.method == 'POST':
        form = LocationForm(request.POST)
        if form.is_valid():
            p = form.save(commit=False)
            p.user = get_object_or_404(User, pk=request.user.pk)
            p.save()
            return redirect('add_description')

    else:
        form = LocationForm()
        return render(request, 'add_location.html', {'form': form})

Answer 1

如错误所示，当表单无效时，您的视图不会返回对帖子请求的响应。

您可以通过将最终return语句移出if块来解决此问题。这样，视图将呈现模板并显示无效表单及其错误。

else:
    form = LocationForm()
return render(request, 'add_location.html', {'form': form})