Django的get_FOO_display不工作

Question

自定義窗體所以這是我的表格：

class QuestionForm(forms.ModelForm): 
    answer = forms.ChoiceField(required=True, widget=forms.RadioSelect()) 

    def __init__(self, question=None, *args, **kwargs): 
     super(QuestionForm, self).__init__(*args, **kwargs) 
     self.fields['answer'].choices = [(a.answer, a.answer) for a in Answer.objects.filter(question=question)] 

    class Meta: 
     model = Questions 
     fields = ('answer', 'importance') 

當用戶選擇一個answer它顯示了所有Answer對象。這裏是我的看法：

def questions(request): 
    new_forms = [] 
    q = Questions.objects.all()[0] 
    if request.method =='POST': 
     #form = QuestionForm(request.POST or None) 
     for forms in new_forms: 
      if forms.is_valid(): 
       new = forms.save(commit=False) 
       #get the user's inputs to the QuestionForm and save them 
       UserAnswer(user=request.user, answer=new.cleaned_data['answer'], question=new.question) 
       UserAnswer.save() 

    else: 
     instance=Questions.objects.all().filter(owner=request.user)[0] 
     #form = QuestionForm(question=q, instance=q) 

    for a in Questions.objects.all(): 
     new_forms.append(QuestionForm(question=a, instance=a)) 
    return render_to_response("questions/base.html", locals(), context_instance=RequestContext(request)) 

Answer 1

我很困惑你在做什麼。

  print new.fields['id_answer_2'].value 
      print get_id_answer_2_display() 

您save(commit=False)一個的ModelForm返回一個模型實例。它甚至不應該有一個fields屬性（你會在這裏得到一個AttributeError）。

2：你接下來撥打電話get_id_answer_2_display()，這似乎不是正確的領域（不必介意你稱之爲獨立功能）。

你的ModelForm意味着你有一個answer領域，從而使用get_FOO_display，你需要調用new.get_answer_display()