如何使Django表单集接受m2m，但将其存储为多个FK记录？

我需要为学生提供一个测试，但有些问题可以接受多个答案

我可以让它创建多个记录来存储多个答案而不是使用M2M吗

e、 g.如果学生选择a和B作为问题，则其行为如下：

StudentAnwer.objects.create(question=question, answer=answer_a)
StudentAnwer.objects.create(question=question, answer=answer_b)

formsets.py

from django import forms

StudentAnswerFormSet = forms.inlineformset_factory(
    Student,
    StudentAnswer,
    fields=['question', 'answer', ],
    formset=forms.BaseInlineFormSet)

models.py

class Question(BaseModel):
    title = models.CharField(max_length=250)
    is_multiple = models.BooleanField(default=False)

class StudentAnswer(BaseModel):
    student = models.ForeignKey(Student, related_name='answers')
    question = models.ForeignKey(Question, related_name='student_answers')
    answer = models.ForeignKey(Answer, related_name='student_answers')

views.py

from formtools.wizard.views import SessionWizardView

class StudentWizardView(SessionWizardView):
    ...

    def get_answer_form(self, step=None, data=None, files=None):
        ...

        question_list = get_question_list()

        return forms.inlineformset_factory(
            Student,
            StudentAnswer,
            fields=['question', 'answer', ],
            extra=len(question_list),
            formset= forms.BaseInlineFormSet)

    def get_form(self, step=None, data=None, files=None):
        form = super(StudentWizardView, self).get_form(step, data, files)

        # determine the step if not given
        if step is None:
            step = self.steps.current

        if step == self.STEP_ANSWER:
            initial_dict = self.get_form_initial(step)

            prev_form_data = self.get_cleaned_data_for_step(self.STEP_PROFILE)

            form = self.get_answer_form(step, data, files)

            for form_index in range(len(initial_dict.keys())):
                question = initial_dict[form_index]['question']

                answer_list = question.get_answer_list()

                if question.is_multiple:
                    form.forms[form_index].fields['answer'] = ModelMultipleChoiceField(queryset=answer_list,
                                                                                   widget=CheckboxSelectMultiple)
                else:
                    form.forms[form_index].fields['answer'].widget.choices.queryset = answer_list

我试图避免M2M，因为它更容易在模板上显示每个问题的可能答案

{{ wizard.management_form }}
{{ wizard.form.management_form }}

{% for answer_form in wizard.form.forms %}
  {{ answer_form.question }}
  {{ answer_form.answer }}

  {% for hidden in answer_form.hidden_fields %}
    {{ hidden }}
  {% endfor %}
{% endfor %}

---

通过使用原始

form.data

而不是

form.cleaned\u data

解决了此问题，因此可以在清理同一字段之前访问多个值

这是有风险的，但您可以复制清理方法，只用于希望它执行操作的部分

还通过以下方式创建了自定义复选框列表：

{% for choice in field.field.choices %}
  <input type="checkbox" id="id_{{ field.html_name }}_{{ forloop.counter }}" name="{{ field.html_name }}" value="{{ choice.id }}"{% if choice.id in field.value %} checked="checked"{% endif %}> {{ choice }}
{% endfor %}

form.forms[form_index].fields['answer'].widget.choices.queryset = answer_list