django形式の書式を書き直します

Question

djangoチュートリアル投票の投票フォームを書き直したいと思います。しかし、私は質問のすべての選択肢のラジオリストを作成する方法を見つけ出すことはできません。

{% if error_message %}<p><strong>{{ error_message }}</strong></p>{% endif %} 
<form action="{% url 'polls:vote' question.id %}" method="post"> 
{% csrf_token %} 
{% for choice in question.choice_set.all %} 
    <input type="radio" name="choice" id="choice{{ forloop.counter }}" value="{{ choice.id }}" /> 
    <label for="choice{{ forloop.counter }}">{{ choice.choice_text }}</label><br /> 
{% endfor %} 
<input type="submit" value="Vote" /> 
</form> 

Answer 1

これを実験の多くが解決した後：

#forms.py 
class VoteForm(forms.ModelForm): 
    choice = forms.ModelChoiceField(queryset=None, widget=forms.RadioSelect) 

    class Meta: 
     model = Question 
     exclude = ('question_text', 'pub_date') 

    def __init__(self, *args, **kwargs): 
     super().__init__(*args, **kwargs) 
     self.fields['choice'].error_messages = { 
      'required': 'No choice selected.', 
      'invalid_choice': 'Invalid choice selected.' 
     } 
     instance = getattr(self, 'instance', None) 
     if instance: 
      self.fields['choice'].queryset = instance.choice_set 
#vote.html 
{% load static %} 
<link rel="stylesheet" type="text/css" href="{% static 'polls/css/style.css' %}" /> 
<h2>{{ question.question_text }}</h2> 
{% if error_message %}<p><strong>{{ error_message }}</strong></p>{% endif %} 
{% if voted %} 
<p><strong>Already voted on this question.</strong><p> 
{% else %} 
<form action="{% url 'polls:vote' question.id %}" method="post"> 
{% csrf_token %} 
{{ form.non_field_errors }} 
<div class="fieldWrapper"> 
    {{ form.choice.errors }} 
    {{ form.choice }} 
</div> 
<input type="submit" value="Vote" /> 
</form> 
{% endif %} 
<p><a href="{% url 'polls:results' question.id %}">View results?</a></p> 
#views.py 
class VoteView(generic.UpdateView): 
template_name = 'polls/vote.html' 
model = Question 
form_class = VoteForm 

def get_queryset(self): 
    return Question.objects.filter(pub_date__lte=timezone.now()).exclude(choice__isnull=True) 

def get_context_data(self, **kwargs): 
    context = super().get_context_data(**kwargs) 
    # Check duplicate vote cookie 
    cookie = self.request.COOKIES.get(cookie_name) 
    if has_voted(cookie, self.object.id): 
     context['voted'] = True 
    return context 

def get_success_url(self): 
    return reverse('polls:results', args=(self.object.id,)) 

def form_valid(self, form): 
    choice = form.cleaned_data['choice'] 
    choice.votes = F('votes') + 1 
    choice.save() 
    redirect = super().form_valid(form) 

    # Set duplicate vote cookie. 
    cookie = self.request.COOKIES.get(cookie_name) 
    half_year = timedelta(weeks=26) 
    expires = datetime.utcnow() + half_year 
    if cookie and re.match(cookie_pattern, cookie): 
     redirect.set_cookie(cookie_name, "{}-{}".format(cookie, self.object.id), expires=expires) 
    else: 
     redirect.set_cookie(cookie_name, self.object.id, expires=expires) 

    return redirect