如何在同一个模型的同一个 Django 视图中保存多个表单？ 当前最后一个表单在保存时覆盖

Question

How do I save multiple forms in the same Django View from the same Model?

Currently the last form overwrites in save

views.py

def createrequest_1(request):

  if request.method == 'POST':

    form1 = SurveyNameForm(request.POST)
    form2 = Question1Form(request.POST)
    form3 = Question2Form(request.POST)

    if form1.is_valid() and form2.is_valid() and form3.is_valid():
        survey = form1.save(commit=False)
        question1 = form2.save(commit=False)
        question2 = form3.save(commit=False)
        survey.survey_creation_date = datetime.date.today()
        survey.customuser = request.user
        survey.save() 
        question1.survey = survey 
        question1.save()
        question2.survey = survey 
        question2.save()

        return HttpResponseRedirect('createrequest_2')
    else:
        form = SurveyNameForm()

  return render(request, 'requestapp/createrequest_1.html', {'SurveyNameForm': SurveyNameForm, 'Question1Form':Question1Form, 'Question2Form': Question2Form})

Answer 1

You must set different prefix for every form. Put instances of forms for render in the template.

In this way:

def createrequest_1(request):
    form1 = SurveyNameForm(request.POST or None, prefix='survey')
    form2 = Question1Form(request.POST or None, prefix='question1')
    form3 = Question2Form(request.POST or None, prefix='question2')

    if request.method == 'POST':

        if form1.is_valid() and form2.is_valid() and form3.is_valid():
            survey = form1.save(commit=False)
            question1 = form2.save(commit=False)
            question2 = form3.save(commit=False)
            survey.survey_creation_date = datetime.date.today()
            survey.customuser = request.user
            survey.save()
            question1.survey = survey
            question1.save()
            question2.survey = survey
            question2.save()

            return HttpResponseRedirect('createrequest_2')


    return render(request, 'requestapp/createrequest_1.html',
                  {'SurveyNameForm': form1, 'Question1Form': form2, 'Question2Form': form3})

This is explained in https://docs.djangoproject.com/en/3.0/ref/forms/api/#django.forms.Form.prefix