save last change in changeset and lock changesets before changing stuff

src/c3nav/editor/migrations/0010_auto_20170704_1431.py

@@ -0,0 +1,30 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.2 on 2017-07-04 14:31
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('editor', '0009_auto_20170701_1218'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='changedobject',
+            name='last_update',
+        ),
+        migrations.RemoveField(
+            model_name='changedobject',
+            name='stale',
+        ),
+        migrations.AddField(
+            model_name='changeset',
+            name='last_change',
+            field=models.DateTimeField(auto_now_add=True, default=django.utils.timezone.now, verbose_name='last change'),
+            preserve_default=False,
+        ),
+    ]