Add a management command to vacuum the database (used after cleaning …

…up the spam, see issue #16)

flosstalks_app/management/commands/vacuum.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+#    This file is part of FLOSS Talks.
+#
+#    FLOSS Talks 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.
+#
+#    FLOSS Talks 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 FLOSS Talks.  If not, see <http://www.gnu.org/licenses/>.
+
+# Inspired by http://djangosnippets.org/snippets/234/
+from django.core.management.base import BaseCommand
+from flosstalks import settings
+from django.db import transaction, connection
+import os
+
+class Command(BaseCommand):
+    help = 'Vacuums the database, i.e. rebuilds the entire database'
+
+    def vacuum_db(self):
+        cursor = connection.cursor()
+        cursor.execute("VACUUM")
+        connection.close()
+
+    def handle(self, *args, **options):
+        self.stdout.write("Vacuuming database...\n")
+        before = os.stat(settings.DATABASES["default"]["NAME"]).st_size
+        self.stdout.write("Size before: %s bytes\n" % before)
+        self.vacuum_db()
+        after = os.stat(settings.DATABASES["default"]["NAME"]).st_size
+        self.stdout.write("Size after: %s bytes\n" % after)
+        self.stdout.write("Reclaimed: %s bytes\n" % (before - after))