unqiue hologram code

certificates/migrations/0003_alter_certificateinstance_hologram_code.py

@@ -0,0 +1,18 @@
+# Generated by Django 5.2.4 on 2025-10-09 08:26
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('certificates', '0002_certificateinstance_hologram_code'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='certificateinstance',
+            name='hologram_code',
+            field=models.CharField(blank=True, max_length=50, null=True, unique=True, verbose_name='کد یکتا هولوگرام'),
+        ),
+    ]