update on_delete category

backend/product/migrations/0060_alter_maincategorymodel_parent_and_more.py

@@ -0,0 +1,24 @@
+# Generated by Django 5.1.2 on 2025-12-08 08:08
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('product', '0059_alter_maincategorymodel_parent'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='maincategorymodel',
+            name='parent',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='maincategorys', to='product.unitcategorymodel', verbose_name='دسته\u200cبندی والد'),
+        ),
+        migrations.AlterField(
+            model_name='subcategorymodel',
+            name='parent',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='subcategorys', to='product.maincategorymodel', verbose_name='دسته\u200cبندی والد'),
+        ),
+    ]