提到驗證錯誤，當涉及到自定義驗證

Question

我有問題在窗體中顯示一個錯誤。

讓我說，我的表單有兩個字段，只有當它們都是空的時候才需要，但是當只有一個字段有值時，我們不能讓情況出現。 所以我試圖做到這一點的驗證在視圖，然後拋出一個異常，一切都是好的，但引發錯誤的調試頁面，追蹤等

raise utils.ValidationError(u'SOME EXAMPLE TEXT') 

這是在視圖中。

所以，我想其他辦法，我已經readed，我可以在形式上做驗證的高清清潔

形式

def clean(self): 
    super(forms.Form,self).clean() 
    if 'departure_date_time_plain' in self.cleaned_data and 'arrival_date_time_plain' not in self.cleaned_data: 
     self._errors['arrival_date_time_plain'] = [u'PUT HERE SOME DATE'] 

    if 'departure_date_time_plain' not in self.cleaned_data and 'arrival_date_time_plain' in self.cleaned_data: 
     self._errors['arrival_date_time_plain'] = [u'PUT HERE SOME DATE'] 
    return self.cleaned_data 

查看我的看法對第二種方法的代碼：

def new_bus(request, id, id_sec): 
    args = {} 
    args.update(csrf(request)) 
    if request.method == 'POST': 
     train_form = TrainForm(request.POST) 
     args['new_train'] = train_form 
     if "train" in request.POST and train_form.is_valid(): 
      if train_form['reservation_train'].value(): 
       train = Train.objects.create(     
        transportation=train_form['trans'].value(), 
        number=train_form['num'].value(),          
        departure=train_form['departure_date_time_train'].value(), 
        arrival=train_form['arrival_date_time_train'].value(), 
        reservation=train_form['reservation_train'].value(), 
        seat_number=train_form['seat_number_train'].value(), 
        section_numbers=train_form['section_numbers_train'].value() 
        ) 
      else: 
       train = Train.objects.create(reservation=False) 

      sec = Section.objects.get(id=id_sec) 
      sec.locomotion = JourneyType.objects.create(train=train) 
      sec.save() 
      return HttpResponseRedirect('/trip/'+ id) 
    args['new_train'] = TrainForm() 
    return render(request, 'add_trip/new_bus.html', args) 

而這種方法從來沒有被調用，你能告訴我如何解決這個問題？因爲我耗盡了教程和其他選項，或許我錯過了一些東西。我將不勝感激任何答案

- 答覆 -

感謝來自@Shang王的意見，我發現了什麼是真正的問題。清潔是要打電話，只有當你的領域是requierd=True，我的錯誤是顯示不正確，因爲一個錯誤：

相反的：

bus_form = BusForm(request.POST) 
plain_form = PlainForm(request.POST) 
train_form = TrainForm(request.POST) 
args['new_bus'] = bus_form 
args['new_plain'] = plain_form 
args['new_train'] = train_form 

我：

bus_form = BusForm() 
plain_form = PlainForm() 
train_form = TrainForm() 
args['new_bus'] = bus_form 
args['new_plain'] = plain_form 
args['new_train'] = train_form 

Answer 1

我認爲你的第二種方法的問題是，你沒有捕獲到從父clean方法返回的cleaned_data。你也打電話錯誤的super方法。應該在表單類本身上調用super，而不是當前類繼承的類。我認爲你應該：

class CurrentForm(forms.Form): 

    def clean(self): 
     cleaned_data = super(CurrentForm, self).clean() 
     if 'departure_date_time_plain' in cleaned_data and 'arrival_date_time_plain' not in cleaned_data: 
      self._errors['arrival_date_time_plain'] = [u'PUT HERE SOME DATE'] 

     if 'departure_date_time_plain' not in cleaned_data and 'arrival_date_time_plain' in cleaned_data: 
      self._errors['arrival_date_time_plain'] = [u'PUT HERE SOME DATE'] 
     return self.cleaned_data 

You will always have the best tutorial by checking out django docs。