django - 未显示 DeleteView 中的成功消息

Question

我有一个删除 View :

class LectureDelete(SuccessMessageMixin, DeleteView):
model = Lecture
success_message = "Die Veranstaltung wurde gelöscht"
success_url = '/'

def get_object(self):
    qs = super(LectureDelete, self).get_object()
    if self.request.user.has_perm('edit_lecture', qs):
        return qs
    else:
        raise exceptions.PermissionDenied

在我的 success_url 链接到的模板中，我有以下代码，它适用于其他消息:

{% if messages %}
        {% for message in messages %}
        <p class="alert alert-dismissable {% if message.tags %}alert-{{ message.tags }}"{% endif %}>
            <button type="button" class="close" data-dismiss="alert" aria-hidden="true">&times;</button>
            {{ message }}
        </p>
        {% endfor %}
    {% endif %}

但是没有显示该消息。我错过了什么吗？我在做什么？谢谢!

Answer 1

我想 this issue在 Django 问题跟踪器中应该回答你的问题。

SuccessMessageMixin hooks to form_valid which is not present on DeleteView to push its message to the user.

它还提供了一种对我有用的替代方法:

from django.views.generic.edit import DeleteView
from django.core.urlresolvers import reverse_lazy
from django.contrib import messages
from .models import Thing

class ThingDelete(DeleteView):
    model = Thing
    success_url = reverse_lazy('list')
    success_message = "Thing was deleted successfully."

    def delete(self, request, *args, **kwargs):
        messages.success(self.request, self.success_message)
        return super(ThingDelete, self).delete(request, *args, **kwargs)

SuccessMessageMixin未在删除 View 中使用(但我确实将它用于创建和更新 View )。
希望这会在以后的 Django 版本中得到改进(更多信息见 issue)。