Add get_object-Method to CheckpointView

aleksis/apps/paweljong/views.py

@@ -978,6 +978,9 @@ class EventCheckpointView(PermissionRequiredMixin, FormView):
     permission_required = "paweljong.event_checkpoint_rule"
     form_class = EventCheckpointForm
 
+    def get_object(self):
+        return Event.objects.get(slug=self.kwargs["slug"])
+
     def get_initial(self):
         initial = super().get_initial() or {}
         if "comment" in self.request.GET: