first commit

backend/apps/operations/migrations/0007_backfill_iotpanel_timestamp.py

@@ -0,0 +1,29 @@
+from datetime import datetime, time
+
+from django.db import migrations
+from django.utils import timezone
+
+
+def backfill_timestamps(apps, schema_editor):
+    IotPanel = apps.get_model("operations", "IotPanel")
+    for row in IotPanel.objects.filter(timestamp__isnull=True):
+        row.timestamp = timezone.make_aware(
+            datetime.combine(row.date, time(0, 0)), timezone.get_current_timezone()
+        )
+        row.save(update_fields=["timestamp"])
+
+
+def unset_timestamps(apps, schema_editor):
+    IotPanel = apps.get_model("operations", "IotPanel")
+    IotPanel.objects.update(timestamp=None)
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("operations", "0006_iotpanel_timestamp"),
+    ]
+
+    operations = [
+        migrations.RunPython(backfill_timestamps, unset_timestamps),
+    ]