Instance.created added. means the creation (clone) of machine. dafaults auto_now_add=True

instances/migrations/0003_instance_created.py

@@ -0,0 +1,21 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import datetime
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('instances', '0002_instance_is_template'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='instance',
+            name='created',
+            field=models.DateField(default=datetime.datetime(2017, 10, 26, 8, 5, 55, 797326), auto_now_add=True),
+            preserve_default=False,
+        ),
+    ]

instances/models.py

@@ -7,6 +7,7 @@ class Instance(models.Model):
     name = models.CharField(max_length=20)
     uuid = models.CharField(max_length=36)
     is_template = models.BooleanField(default=False)
+    created = models.DateField(auto_now_add=True)
 
     def __unicode__(self):
         return self.name