Activate the Submission last_activity field

submissions/migrations/0043_auto_20170512_0836.py

+# -*- coding: utf-8 -*-
+# Generated by Django 1.10.3 on 2017-05-12 06:36
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('submissions', '0042_auto_20170511_2321'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='submission',
+            name='latest_activity',
+            field=models.DateTimeField(auto_now=True),
+        ),
+    ]

submissions/models.py

@@ -79,7 +79,7 @@ class Submission(ArxivCallable, models.Model):
     # Metadata
     metadata = JSONField(default={}, blank=True, null=True)
     submission_date = models.DateField(verbose_name='submission date', default=datetime.date.today)
-    latest_activity = models.DateTimeField(default=timezone.now)
+    latest_activity = models.DateTimeField(auto_now=True)
 
     objects = SubmissionManager()