Automatically set device change timestamp on creation

manager/migrations/0043_auto_20190202_1529.py

@@ -0,0 +1,23 @@
+# Generated by Django 2.1.5 on 2019-02-02 15:29
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('manager', '0042_auto_20190202_1318'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='device',
+            name='changed',
+            field=models.DateTimeField(auto_now_add=True, verbose_name='Last Change of Device Config'),
+        ),
+        migrations.AlterField(
+            model_name='device',
+            name='wifi',
+            field=models.ManyToManyField(blank=True, to='manager.Wifi'),
+        ),
+    ]

manager/models.py

@@ -60,7 +60,7 @@ class Device(models.Model):
     firmware = models.DateTimeField("Firmware Creation Time", blank=True, null=True, editable=False)
     update = models.BooleanField("Trigger Firmware Update", default=False)
     reboot = models.BooleanField("Trigger Reboot", default=False)
-    changed = models.DateTimeField("Last Change of Device Config")
+    changed = models.DateTimeField("Last Change of Device Config", auto_now_add=True)
     wireless = models.DateTimeField("Last Update of Wireless Config", blank=True, null=True, editable=False)
 
     def __str__(self):