如何在django泛型视图中使用success_mesasge ()设置格式？

from django.contrib.messages.views import SuccessMessageMixin

from django.views.generic import CreateView
from django.contrib.messages.views import SuccessMessageMixin

class MyView(SuccessMessageMixin, CreateView):
    # 视图的其他配置

class MyView(SuccessMessageMixin, CreateView):
    success_message = "成功消息的格式"
    # 视图的其他配置

success_message = "成功创建%(name)s"

class MyView(SuccessMessageMixin, CreateView):
    success_message = "成功消息的格式"
    
    def form_valid(self, form):
        response = super().form_valid(form)
        messages.success(self.request, self.success_message)
        return response