在填写表单之前，如何使用基于类的UpdateView创建新的“草稿”对象？

from django.views.generic.edit import UpdateView
from .forms import YourForm

class YourUpdateView(UpdateView):
    model = YourModel
    form_class = YourForm

def get_object(self, queryset=None):
    # 如果要创建新的“草稿”对象，返回一个新的空对象
    if queryset is None:
        queryset = self.get_queryset()
    obj = queryset.none()
    return obj

from .views import YourUpdateView

urlpatterns = [
    path('your-url/<int:pk>/', YourUpdateView.as_view(), name='your-update-view'),
]