--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/server/python/django2/renkanmanager/signals.py	Mon Jun 20 14:44:40 2016 +0200
@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+import logging
+from renkanmanager import settings as renkan_settings
+from renkanmanager.models import Revision
+from django.db.models.signals import post_save
+from django.dispatch import receiver
+
+logger = logging.getLogger(__name__)
+
+
+@receiver(post_save, sender=Revision)
+def revision_post_save(sender, instance, created, raw, using, update_fields, **kwargs):
+    renkan = instance.parent_renkan
+    parent_revisions = renkan.revisions.all()
+    logger.debug("REVISIONS %r, INSTANCE %r, CURRENT %r", parent_revisions, instance, renkan.current_revision)
+
+    if (not renkan.current_revision or renkan_settings.RENKAN_AUTO_CURRENT_REVISION) and parent_revisions.count() >= 1 and renkan.current_revision !=  parent_revisions[0]:
+        logger.debug("CHANGE CURRENT REVISION OLD: %r , NEW: %r", renkan.current_revision, parent_revisions[0])
+        renkan.current_revision = parent_revisions[0]
+        renkan.save()