created at field

backend/product/admin.py

@@ -168,7 +168,8 @@ class ProductVariantAdmin(ModelAdmin, ImportExportModelAdmin):
     export_form_class = ExportForm
     autocomplete_fields = ['product_attributes', 'images', 'in_pack_items', 'details']
     warn_unsaved_form = True
-    readonly_fields = ['price']
+    readonly_fields = ['price', 'created_at']
+    list_display = ('product', 'created_at')
     # inlines = [DetailModelInLine]
 
 @admin.register(ProductModel)
@@ -176,14 +177,14 @@ class ProductModelAdmin(ModelAdmin, ImportExportModelAdmin):
     import_form_class = ImportForm
     export_form_class = ExportForm
     inlines = [ProductVariantInLine]
-    readonly_fields = ('slug', )
+    readonly_fields = ('slug', 'created_at')
     search_fields = ['name', 'description', ]
     list_filter = ['show', 'category']
     autocomplete_fields = ['related_products', ]
     # compressed_fields = True
     warn_unsaved_form = True
     actions_list = ['redirect_to_learn', 'update_products_price']
-    list_display = ['display_image', 'display_price', 'view', 'show', 'rating', 'category', ]
+    list_display = ['display_image', 'display_price', 'view', 'show', 'rating', 'category', 'created_at']
     fieldsets = (
         ('فیلد های اصلی', {'fields': ('name', 'description',  'category', 'related_products', 'show',), "classes": ["tab"],}),
         ('فیلد های سيو', {'fields': ('meta_description', 'meta_keywords', 'meta_rating', 'slug'), "classes": ["tab"],}),

backend/product/migrations/0048_productvariant_created_at.py

@@ -0,0 +1,20 @@
+# Generated by Django 5.1.2 on 2025-05-22 14:31
+
+import django.utils.timezone
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('product', '0047_alter_maincategorymodel_video'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='productvariant',
+            name='created_at',
+            field=models.DateTimeField(auto_now_add=True, default=django.utils.timezone.now, verbose_name='زمان ثبت محصول'),
+            preserve_default=False,
+        ),
+    ]

backend/product/models.py

@@ -115,6 +115,7 @@ class ProductModel(models.Model):
 
 
 
+
     def __str__(self):
         return self.name
 
@@ -244,6 +245,8 @@ class ProductVariant(models.Model):
     video = models.FileField(upload_to='product_videos/', blank=True, null=True, verbose_name='ویدیو')
     details = models.ManyToManyField(ProductDetailModel, verbose_name='جزییات محصول', related_name='product')
     slider_category = models.ForeignKey(ShowCaseSlider, verbose_name='دسته بندی پورسانتی', blank=True, null=True, on_delete=models.CASCADE)
+    created_at = models.DateTimeField(auto_now_add=True, verbose_name='زمان ثبت محصول')
+
     class Meta:
         verbose_name = 'تنوع محصول'
         verbose_name_plural = 'تنوع‌های محصول'