Django 的 SuccessMessageMixin 不能与 DeleteView 一起使用答案

【问题标题】：Django's SuccessMessageMixin not working with DeleteViewDjango 的 SuccessMessageMixin 不能与 DeleteView 一起使用
【发布时间】：2018-02-13 22:52:41
【问题描述】：

在https://docs.djangoproject.com/en/2.0/ref/contrib/messages/#adding-messages-in-class-based-views 之后，我正在尝试向DeleteView 添加一条成功消息：

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


class SessionDelete(SuccessMessageMixin, DeleteView):
    model = Session
    success_url = reverse_lazy('dashboard:sessions')
    success_message = "Session %(id)s (%(session_type)s) was deleted successfully"

但是，我注意到这在 Django 1.11.9 中不起作用。我找到了这个拉取请求，https://github.com/django/django/pull/5992，但它似乎由于不活动而被关闭。我是否正确理解成功消息仍然无法与DeleteViews 一起正常工作？

【问题讨论】：

也偶然发现了这一点。看起来这个错误仍然没有解决。这里的答案对我有用：stackoverflow.com/questions/24822509/…
success_message in DeleteView not shown的可能重复
在 Django 4.0 中似乎终于可以解决这个问题：github.com/django/django/pull/13362

标签： python django

【解决方案1】：

导入from django.contrib import messages
将其用作您的视图或将其转换为 mixin。

class SessionDelete(DeleteView):
    model = Session
    success_url = reverse_lazy('dashboard:sessions')
    success_message = "Session %(id)s (%(session_type)s) was deleted successfully"
    
    def delete(self, request, *args, **kwargs):
        messages.success(self.request, self.success_message, 'danger')

        return super(SessionDelete, self).delete(request, *args, **kwargs)

您不需要 SuccessMessageMixin，它现在工作正常！

【讨论】：