inline formset data not save

[Anirban Singha]

models.py

class product_list(models.Model):

   date=models.DateTimeField(auto_now_add=True,null=True)

   deal=models.ForeignKey(dealForm, null=True, blank=True , on_delete=models.CASCADE)

   pro_name=models.ForeignKey(wareForm, null=True, on_delete=models.CASCADE)

   pro_quantity=models.IntegerField()

   def __str__(self):

     return self.name

forms.py

class productForm(ModelForm):

   class Meta:

     model=product_list

     fields= '__all__'

views.py

def myproduct(request, pk):

   x=wareForm.objects.all()

   DeliveryFormSet=inlineformset_factory(dealForm, product_list, fields=('pro_name','pro_quantity'), extra=len(x), can_delete=False)

   dealer=dealForm.objects.get(id=pk)

   formset=DeliveryFormSet(queryset= product_list.objects.none() , instance=dealer)

   #date=datetime.datetime.now().strftime("%d-%m-%y")

   if request.method == 'POST':

     formset=DeliveryFormSet(request.POST,instance=dealer)

     print(formset)

     if formset.is_valid():

       for f in formset:

         print ('testing')

       return HttpResponseRedirect('delivery.html')

     else:

       print('hello')

context={'name':'Product list','formset':formset}

return render(request, 'product.html',context)

in this code formset.isvalid is false. BTW i'm beginner