错误: MultiValueKeyError在/quiz/2/11‘选择’

Question

我正在创建一个多选择问答应用程序，我已经创建了一个视图，其中显示了问题和4选项。我已经给出了每个选项的单选按钮，但是给了我这个错误：

MultiValueDictKeyError /quiz/2/11/“选择”

views.py

def question_detail(request,question_id,quiz_id):
    q = Quiz.objects.get(pk=quiz_id)
    que = Question.objects.get(pk=question_id)
    ans = que.answer_set.all()
    selected_choice = que.answer_set.get(pk=request.POST['choice'])
    if selected_choice is True:
        come = que.rank
        came = come + 1
        later_question = q.question_set.get(rank=came)
        return render(request,'app/question_detail.html',{'que':que , 'later_question':later_question, 'ans':ans})
    else:
        come = que.rank
        later_question = q.question_set.get(rank=come)
        return render(request, 'app/question_detail.html', {'que': que, 'later_question': later_question, 'ans': ans})

question_detail.html

<form action="{% 'app:detail' quiz_id=quiz.id question_id=que.id %}" method="post">
    {% csrf_token %}
    {% for choice in que.answer_set.all %}
        <input type="radio" name="choice" id="choice{{forloop.counter}}" value="{{choice.id}}">
        <label for="choice{{forloop.counter}}">{{choice.answer}}</label>
    {% endfor %}
</form>

Answer 1

好的，就像我在评论中说的，您很可能会收到这个错误，因为在正常的POST请求期间，GET对象将是空的。因此，您应该将在请求之后发生的所有内容包装在IF块中：

if request.method === 'POST':
    selected_choice = que.answer_set.get(pk=request.POST['choice'])
    # Every other post-submit task  

如果需要表单数据，应该始终在视图中检查POST方法。其他人也曾对此作过更深入的回答，所以我会直接告诉你们：

What does request.method == "POST" mean in Django?