Django窗体为2相关模型

Question

我想制作单独提交这2个模型的表单。不知何故，我设法得到他们的意见。但是，我得到错误说：

不受约束的方法full_clean（）必须与MCQuestions实例作为第一个参数来调用（什么都没有代替）

我的细节是：

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}) 

和错误是突出bform_valid = bform.is_valid()

Answer 1

此：

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

应该是：

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

其中answers是MCAnswers一个实例。目前还没有答案（您即将创建它），所以现在就从代码中移除它。

---

您需要将前缀添加到您的表格，以便验证将正常工作，你最好给这些给有意义的名称（不aform）

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

---

最后保存，这样做 - 您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('...'))