Question

我正在研究多项选择题。 2个模型Question and Answers.i希望在一个表单集视图中同时处理这两个问题。但是，如果我从表单集中更改了多余的或max_num参数，则会收到“ ManagementForm数据丢失”的信息，然后得到“ MultiValueDict”对象没有属性“ pk”的信息。我无法解决问题。

class Question(models.Model):
    subject    = models.ForeignKey(Subject, on_delete=models.PROTECT)
    topic       = models.ForeignKey(Topic, on_delete=models.PROTECT)
    desciption  = models.TextField(max_length=700, null=False)


    def __str__(self):
        return "%s %s %s" % (self.desciption[:100],self.topic,self.subject)

class Answers(models.Model):
    question = models.ForeignKey(Question, on_delete=models.CASCADE)
    option  = models.CharField(max_length=100)
    is_true  = models.BooleanField(default=False)
    explaination = models.TextField(max_length=500, null=True ,blank=True)

    def __str__(self):
        return "%s" % (self.option)

我的forms.py

class QuestionForm(forms.ModelForm):
    class  Meta:
        model = Question
        fields = ('subject', 'topic', 'desciption')

      
class AnswerForm(forms.ModelForm):
    class Meta:
        model = Answers
        fields = ('option', 'is_true', 'explaination')
        exclude = ('question',)

def posttestq(request):

    AnswerFormSet = inlineformset_factory(Question,Answers, form=AnswerForm, extra=4,max_num=4 )
    data = {'form-TOTAL_FORMS': '4','form-INITIAL_FORMS': '0','form-MAX_NUM_FORMS': '4',}
    if request.method == 'POST':
        question_form = QuestionForm(request.POST, prefix='question')
        answer_formset = AnswerFormSet( data,
            request.POST, request.FILES, prefix='answer')
        if question_form.is_valid() : #and
            if answer_formset.is_valid():
                question = question_form.save()
                print(question)
                answer_formset = AnswerFormSet(
                    request.POST, request.FILES, prefix='answer', instance=question)
                # I have to validate (again - so I'm confident) to access clean data
                answer_formset.is_valid()
                print(answer_formset)
                answer_formset.save()
                return redirect('post_list')
            
        else:
            return render(request, 'mcq/testq.html', {
                'message': "Check your form",
                'question_form': question_form,
                'answer_formset': answer_formset,
            })
    else:
        question_form = QuestionForm(prefix='question')
        answer_formset = AnswerFormSet( prefix='answer')
        return render(request, 'mcq/testq.html', {
            'question_form': question_form,
            'answer_formset': answer_formset,
        })

现在我得到了'MultiValueDict'对象，没有属性'pk'错误，但是如果我删除了“数据”参数“ ManagementForm数据丢失”

我的html文件是

<form action="" method="POST">
    {% csrf_token %}
    {{question_form.management_form}}
    {% for answer_form in answer_formset %}
    <br>
    {{answer_form}}
    {% endfor %}
    <input type="submit" class="button btn-primary">
</form>

如何解决ManagementForm数据丢失的问题

0 个答案: