Django“视图未返回HttpResponse对象。”

Question

I have a very basic view where I'm saving a form. For some reason I keep getting a "view didn't return an HttpResponse object" error. I looked at this common issue here but haven't found a solution that applies to me. does anyone have any thoughts? I've included the code below. Would greatly appreciate help with this simple question!

def EarlyAdopterSignup(request):
    f = LandingPageForm(request.POST)
    if f.is_valid():
        email = f.cleaned_data['email']
        zip = f.cleaned_data['zip']
        adopter = EarlyAdopter(email = email, zip = zip)
        try:
            adopter.save()
            return render_to_response('EarlyAdopterSignup.html')
        except:
            return HttpResponse("There was an error with your submission. Please try again.")

Answer 1

To follow up on what AL is saying it is necessary to handle the case where the form IS NOT valid.

This can be handled quite simply by passing a bound invalid form ( f ) back to your template.

https://docs.djangoproject.com/en/dev/topics/forms/?from=olddocs#using-a-form-in-a-view

Is an illustration of exactly what you need to do ^

def EarlyAdopterSignup(request):
    f = LandingPageForm(request.POST)
    if f.is_valid():
        email = f.cleaned_data['email']
        zip = f.cleaned_data['zip']
        adopter = EarlyAdopter(email = email, zip = zip)
        try:
            adopter.save()
            return render_to_response('EarlyAdopterSignup.html')
        except:
            return HttpResponse("There was an error with your submission. Please try again.")

   # handle where not valid
   return render(request, 'your_form_template.html', {
    'form': f,  # <- your invalid form instance
})

Answer 2

Well, to begin with, if your form isn't valid, you're not returning anything. You should be reshowing the form with errors displayed.