RelatedForms

if request.POST:
        post = request.POST.copy()
        order_form = OrderForm(post, instance=order, prefix='ord', label_suffix='')
        client_form = ClientForm(post, instance=client, prefix='cli', label_suffix='')
        # paytype_form=PayType(post, instance=order.pay_type, prefix='paytp')

        if order_form.is_valid() and client_form.is_valid():
            order = order_form.save(commit=False)
            order.client = client_form.save()
            # order.pay_type=paytype_form.save()
            status = Status.objects.get(title='sent')
            order.status = status
            order.save()