dont fail if list does not exist

oml/queryparser.py

@@ -141,7 +141,12 @@ class Parser(object):
                 peer = utils.get_peer(u.id)
                 ids = peer.info['lists'].get(name, [])
             else:
-                l = self._list.query.filter_by(user_id=u.id, name=name).one()
+                l = self._list.query.filter_by(user_id=u.id, name=name).first()
+                if not l:
+                    q = operators.eq(self._model.id, '')
+                    if exclude:
+                        q = ~q
+                    return q
                 if l.type == 'static':
                     ids = self._list_items.select().where(
                         self._list_items.columns['list_id'].is_(l.id)