Add last_read_counter for cryptographic NFC tags

aleksis/apps/kort/migrations/0016_card_last_read_counter.py

+# Generated by Django 4.1.9 on 2023-06-17 14:28
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("sites", "0002_alter_domain_unique"),
+        ("kort", "0015_migrate_scopes"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="card",
+            name="last_read_counter",
+            field=models.IntegerField(default=0, verbose_name="Last read counter"),
+        ),
+    ]

aleksis/apps/kort/models/cards.py

@@ -263,6 +263,8 @@ class Card(ExtensibleModel):
     valid_until = models.DateField(verbose_name=_("Valid until"))
     deactivated = models.BooleanField(verbose_name=_("Deactivated"), default=False)
 
+    last_read_counter = models.IntegerField(verbose_name=_("Last read counter"), default=0)
+
     layout = models.ForeignKey(
         CardLayout, on_delete=models.SET_NULL, blank=True, null=True, verbose_name=_("Card Layout")
     )