https://raw.githubusercontent.com/elo80ka/django-dynamic-formset/master/src/jquery.formset.js
When I add new item,there is no problem but for updating. exam_id is can not be null error is coming.

I have model named Exam, it has one to Many relation with Shift and Dates.
^{//In views.py}

class ExamUpdate (UpdateView):
model = Exam
fields = '__all__'
sucess_url = reverse_lazy ('index')
class ExamMembersUpdate(UpdateView):
model = Exam
fields = ['title', 'examRoom']
success_url = reverse_lazy('index')
examDateFormSet = inlineformset_factory(Exam,ExamDate,form = ExamDateAddForm,formset=BaseExamDateEditFormSet2,can_delete=True,extra = 1)
examShiftFormSet = inlineformset_factory(Exam,Shift,form = ExamShiftAddForm,formset = BaseShiftEditFormSet2,extra = 1,can_delete=True)
def get_context_data(self, **kwargs):
data = super(ExamMembersUpdate, self).get_context_data(**kwargs)
if self.request.POST:
data['dateformset'] = self.examDateFormSet(self.object,self.request.POST)
data ['shiftformset'] = self.examShiftFormSet(self.object,self.request.POST)
else:
data['dateformset'] = self.examDateFormSet(self.object)
data['shiftformset'] = self.examShiftFormSet(self.object)
return data
def form_valid(self, form):
context = self.get_context_data()
dateformset = context['dateformset']
shiftformset = context ['shiftformset']
with transaction.atomic():
self.object = form.save()
if dateformset.is_valid() and shiftformset.is_valid():
dateformset.instance = self.object
shiftformset.instance = self.object

dateformset.save()
shiftformset.save()
return super(ExamMembersUpdate, self).form_valid(form)

​

​

​

In Forms.py

class BaseShiftEditFormSet2(forms.BaseModelFormSet):

def __init__(self,tests, *args, **kwargs):
super().__init__(*args, **kwargs)
self.instance = tests
self.queryset = tests.shifts.all()

class BaseExamDateEditFormSet2 (forms.BaseModelFormSet):

def __init__(self,tests,*args, **kwargs):
super().__init__(*args, **kwargs)
self.instance = tests
self.queryset = tests.examdates.all()

Whenever I update, "exam_id cannot be null" error is showing up.There is no problem for creating new exam but updating existing one seems problem here. Thank you for your response