fix auto values for inserted field

cntmanage/flightslot/migrations/0034_alter_weekpreference_inserted.py

@@ -0,0 +1,18 @@
+# Generated by Django 5.2.8 on 2025-12-10 11:20
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('flightslot', '0033_alter_weekpreference_inserted'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='weekpreference',
+            name='inserted',
+            field=models.DateTimeField(auto_now_add=True),
+        ),
+    ]

cntmanage/flightslot/models/weekpref.py

@@ -1,5 +1,5 @@
 from django.db import models
-from datetime import date, datetime
+from datetime import date
 
 from ..models.students import Student
 
@@ -26,7 +26,7 @@ class WeekPreference(models.Model):
 
     inserted = models.DateTimeField(
         null=False,
-        default=datetime.now(),
+        auto_now_add=True
     )
 
     def __str__(self):