gistfile1.py

class AfiliacionNacionalCreateView(CreateView):
    model = AfiliacionNacional 
    form_class = AfiliacionNacionalForm 
    success_url = reverse_lazy('afiliacionnacional-list')

    def form_valid(self, form):
        messages.info(self.request, 'Afiliacion  creado', extra_tags='alert alert-success')
        return super(AfiliacionNacionalCreateView, self).form_valid(form)

class AfiliacionNacionalDeleteView(DeleteView):
    model = AfiliacionNacional 
    success_url = reverse_lazy('afiliacionnacional-list')

    def post(self, *args, **kwargs):
        messages.info(self.request, 'Afiliacion ha sido borrada', extra_tags='alert alert-success')
        return super(AfiliacionNacionalDeleteView, self).post(*args, **kwargs)

class AfiliacionNacionalUpdateView(UpdateView):
    model = AfiliacionNacional 
    form_class = AfiliacionNacionalForm 
    success_url = reverse_lazy('afiliacionnacional-list')

    def form_valid(self, form):
        messages.info(self.request, 'Afiliacion editada con éxito', extra_tags='alert alert-success')
        return super(AfiliacionNacionalUpdateView, self).form_valid(form)