Django「視圖沒有返回HttpResponse對象。」

Question

我有一個非常基本的視圖，我正在保存表單。出於某種原因，我不斷收到「視圖沒有返回HttpResponse對象」錯誤。我在這裏看到了這個常見問題，但還沒有找到適用於我的解決方案。有人有想法嗎？我已經包含下面的代碼。非常感謝幫助這個簡單的問題！

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

那麼，首先，如果您的表單無效，您不會返回任何內容。您應該重新顯示顯示錯誤的表單。

Answer 2

爲了跟進A.L的說法，有必要處理表格無效的情況。

通過將綁定的無效表單（f）傳遞迴您的模板，可以很簡單地處理此問題。

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

是你需要做的^

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 
}) 

正是一個例證