Implement nested RackGroups

netbox/dcim/migrations/0101_nested_rackgroups.py

@@ -0,0 +1,43 @@
+from django.db import migrations, models
+import django.db.models.deletion
+import mptt.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('dcim', '0100_mptt_remove_indexes'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='rackgroup',
+            name='parent',
+            field=mptt.fields.TreeForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, related_name='children', to='dcim.RackGroup'),
+        ),
+        migrations.AddField(
+            model_name='rackgroup',
+            name='level',
+            field=models.PositiveIntegerField(default=0, editable=False),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name='rackgroup',
+            name='lft',
+            field=models.PositiveIntegerField(default=1, editable=False),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name='rackgroup',
+            name='rght',
+            field=models.PositiveIntegerField(default=2, editable=False),
+            preserve_default=False,
+        ),
+        # tree_id will be set to a valid value during the following migration (which needs to be a separate migration)
+        migrations.AddField(
+            model_name='rackgroup',
+            name='tree_id',
+            field=models.PositiveIntegerField(db_index=True, default=0, editable=False),
+            preserve_default=False,
+        ),
+    ]