From f0ff23094fe855df7f4dedaeab8a9dccaccc301d Mon Sep 17 00:00:00 2001
From: Parsa Nazer <parsa.nazerrr@gmail.com>
Date: Mon, 8 Dec 2025 11:40:24 +0330
Subject: [PATCH] update on_delete category

---
 ...alter_maincategorymodel_parent_and_more.py | 24 +++++++++++++++++++
 backend/product/models.py                     |  6 ++---
 2 files changed, 27 insertions(+), 3 deletions(-)
 create mode 100644 backend/product/migrations/0060_alter_maincategorymodel_parent_and_more.py

diff --git a/backend/product/migrations/0060_alter_maincategorymodel_parent_and_more.py b/backend/product/migrations/0060_alter_maincategorymodel_parent_and_more.py
new file mode 100644
index 0000000..92de253
--- /dev/null
+++ b/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'),
+        ),
+    ]
diff --git a/backend/product/models.py b/backend/product/models.py
index 4617358..4ddc54f 100644
--- a/backend/product/models.py
+++ b/backend/product/models.py
@@ -54,7 +54,7 @@ class MainCategoryModel(models.Model):
         max_length=160, verbose_name="توضیحات متا", help_text="توضیحات متا برای SEO", blank=True, null=True)
     video = models.FileField(upload_to='category_videos/',
                              blank=True, null=True, verbose_name='ویدیو')
-    parent = models.ForeignKey(UnitCategoryModel, on_delete=models.CASCADE,
+    parent = models.ForeignKey(UnitCategoryModel, on_delete=models.SET_NULL,
                                related_name='maincategorys', verbose_name='دسته‌بندی والد', null=True)
     class Meta:
         verbose_name = "دسته‌بندی اصلی"
@@ -84,8 +84,8 @@ class SubCategoryModel(models.Model):
         max_length=60, verbose_name="عنوان متا", help_text="عنوان متا برای SEO", blank=True, null=True)
     meta_description = models.TextField(
         max_length=160, verbose_name="توضیحات متا", help_text="توضیحات متا برای SEO", blank=True, null=True)
-    parent = models.ForeignKey(MainCategoryModel, on_delete=models.CASCADE,
-                               related_name='subcategorys', verbose_name='دسته‌بندی والد')
+    parent = models.ForeignKey(MainCategoryModel, on_delete=models.SET_NULL,
+                               related_name='subcategorys', verbose_name='دسته‌بندی والد', null=True)
 
     class Meta:
         verbose_name = "زیر دسته‌بندی"