Django形式为2相关模型

I want to make forms that submit individually these 2 models. Somehow i managed to get views for them. However, i got error saying:

我想制作单独提交这2个模型的表格。不知怎的，我设法为他们获得了意见。但是，我得到错误说：

unbound method full_clean() must be called with MCQuestions instance as first argument (got nothing instead)

必须使用MCQuestions实例作为第一个参数调用未绑定方法full_clean（）（没有任何内容）

my details are:

我的详细信息是：

models.py

class MCQuestions(models.Model):
    question = FroalaField(null=True, blank=True)
    qcategory = models.ForeignKey(Categories, related_name="MCCategory", blank=True)


class MCAnswers(models.Model):
    questionid = models.ForeignKey(MCQuestions, related_name="mc_answer")
    a = models.CharField(max_length=50, null=True, blank=True)
    z_a = models.BooleanField(default=False)
    b = models.CharField(max_length=50, null=True, blank=True)
    z_b = models.BooleanField(default=False)
    c = models.CharField(max_length=50, null=True, blank=True)
    z_c = models.BooleanField(default=False)
    d = models.CharField(max_length=50, null=True, blank=True)
    z_d = models.BooleanField(default=False)

views.py

 def AddMCQuestions(request, course_id):
    if request.method == 'POST':
        aform = MCQuestionsForm(request.POST)
        bform = MCAnswersForm(request.POST, instance=MCQuestions)
        #cat = Categories.objects.filter(cid=course_id)
        aform_valid = aform.is_valid()
        **bform_valid = bform.is_valid()**
        if aform_valid and bform_valid:
            a = aform.save(commit=False)
            a.qcategory_id = course_id
            a.save()
            b = bform.save(commit=False)
            b.save()
            return HttpResponse('question added')
    else:
        aform = MCQuestionsForm()
        bform = MCAnswersForm()
        bform.qcategoryid = a
   return render(request, 'teacher/mcquestionadd.html', {'aform': aform, 'bform': bform})

and error is highlighting bform_valid = bform.is_valid()

错误突出显示bform_valid = bform.is_valid（）

1 个解决方案

#1

This:

这个：

bform = MCAnswersForm(request.POST, instance=MCQuestions)

should be:

应该：

bform = MCAnswersForm(request.POST, instance=answers)

where answers is an instance of MCAnswers. There is no answer yet in your view (you are about to create it) so just remove it from your code for now.

其中答案是MCAnswers的一个实例。您的视图中还没有答案（您即将创建它），因此暂时将其从代码中删除。

You will need to add prefixes to your forms so the validation will work properly and you better give meaningful names to these (not aform)

您需要在表单中添加前缀，以便验证能够正常运行，并且您最好为这些表单赋予有意义的名称（不是aform）

    question_form = MCQuestionsForm(request.POST, prefix="question")
    answer_form = MCAnswersForm(request.POST, prefix="answers")

Finally to save, do this - you are missing the link from the question to the answer:

最后保存，这样做 - 你错过了从问题到答案的链接：

  if question_form.is_valid() and answer_form.is_valid():
        question = question_form.save(commit=False)
        question.qcategory_id = course_id
        question.save()

        answer = bform.save(commit=False)
        answer.question = question
        answer.save()

        return HttpRedirect(reverse('...'))

#1