Django Forms UpdateView:如何在成功更新后提醒用户？

from django.views.generic.edit import UpdateView

class MyFormUpdateView(UpdateView):
    model = MyModel
    form_class = MyForm
    success_url = '/success-page/'

from django.contrib import messages
from django.views.generic.edit import UpdateView

class MyFormUpdateView(UpdateView):
    model = MyModel
    form_class = MyForm

    def form_valid(self, form):
        messages.success(self.request, '表单更新成功！')
        return super().form_valid(form)

{% if messages %}
    <ul class="messages">
        {% for message in messages %}
            <li{% if message.tags %} class="{{ message.tags }}"{% endif %}>{{ message }}</li>
        {% endfor %}
    </ul>
{% endif %}