Show a success message

hosts/views.py

 # coding: utf-8
+from django.core.urlresolvers import reverse, reverse_lazy
+from django.contrib import messages
 from django.contrib.auth.decorators import login_required
+from django.contrib.messages.views import SuccessMessageMixin
 from django.shortcuts import render, get_object_or_404, redirect
-from django.contrib import messages
-from django.utils.translation import ugettext_lazy as _
-from django.core.urlresolvers import reverse, reverse_lazy
 from django.http import HttpResponseRedirect
+from django.utils.translation import ugettext_lazy as _
 from django.views.generic.edit import DeleteView
 import hosts.models as hmodels
 import problems.models as pmodels
@@ -112,9 +113,10 @@ def reinstate_host(request, id):
     return HttpResponseRedirect(reverse('host', args=[host.id,]))
 
 
-class DropHost(UserMixin, DeleteView):
+class DropHost(UserMixin, SuccessMessageMixin, DeleteView):
     model = hmodels.Computer
     template_name = "hosts/drop_host.html"
+    success_message = _("%(hostname)s has been successfully deleted.")
 
     def get_success_url(self):
         return reverse_lazy("school_detail", kwargs={"pk": self.object.school.pk})