Merge "Avoid AttributeError: SecurityGroup error handle"

openstack_dashboard/dashboards/project/access_and_security/security_groups/views.py

@@ -55,7 +55,10 @@ class DetailView(tables.DataTableView):
                               redirect=redirect)
 
     def get_data(self):
-        return self._get_data().rules
+        data = self._get_data()
+        if data is None:
+            return []
+        return data.rules
 
     def get_context_data(self, **kwargs):
         context = super(DetailView, self).get_context_data(**kwargs)