success_message in DeleteView not shown

Question

I have a DeleteView:

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 

And in my template to which the success_url links, I have the following code, which works fine with other messages:

{% 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 %} 

But the message is not shown. Am I missing something? What am I doing worng? Thanks!

Answer 1

I think this issue in the Django issue tracker should answer your question.

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

It also gives an alternative way which works for me:

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 was not used in the delete-view (but I do use it for the Create and Update views). Hopefully this will be improved in later versions of Django (see issue for more info).