admin filter options and timestamp fields

cookbook/migrations/0139_space_created_at.py

@@ -0,0 +1,20 @@
+# Generated by Django 3.2.4 on 2021-06-22 16:14
+
+from django.db import migrations, models
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('cookbook', '0138_auto_20210617_1602'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='space',
+            name='created_at',
+            field=models.DateTimeField(auto_now_add=True, default=django.utils.timezone.now),
+            preserve_default=False,
+        ),
+    ]

cookbook/migrations/0140_userpreference_created_at.py

@@ -0,0 +1,20 @@
+# Generated by Django 3.2.4 on 2021-06-22 16:19
+
+from django.db import migrations, models
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('cookbook', '0139_space_created_at'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='userpreference',
+            name='created_at',
+            field=models.DateTimeField(auto_now_add=True, default=django.utils.timezone.now),
+            preserve_default=False,
+        ),
+    ]