Add updater for admin in questions, announcements, messages

Author: stefano-maggiolo

cms/db/__init__.py

@@ -88,7 +88,7 @@
 
 # Instantiate or import these objects.
 
-version = 38
+version = 39
 
 engine = create_engine(config.database, echo=config.database_debug,
                        pool_timeout=60, pool_recycle=120)

cmscontrib/updaters/update_39.py

@@ -0,0 +1,53 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+# Contest Management System - http://cms-dev.github.io/
+# Copyright © 2018 Stefano Maggiolo <s.maggiolo@gmail.com>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+"""A class to update a dump created by CMS.
+
+Used by DumpImporter and DumpUpdater.
+
+Add default values (null) to the new admin field in questions, messages and
+announcements.
+
+"""
+
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+from future.builtins.disabled import *  # noqa
+from future.builtins import *  # noqa
+from six import iteritems
+
+
+class Updater(object):
+
+    def __init__(self, data):
+        assert data["_version"] == 38
+        self.objs = data
+
+    def run(self):
+        for k, v in iteritems(self.objs):
+            if k.startswith("_"):
+                continue
+            if v["_class"] == "Question" \
+                    or v["_class"] == "Message" \
+                    or v["_class"] == "Announcement":
+                v["admin"] = None
+
+        return self.objs