cron job added if it wont work fck this

backend/product/admin.py

@@ -9,7 +9,7 @@ from django.contrib.postgres.fields import ArrayField
 from unfold.widgets import UnfoldAdminColorInputWidget
 from unfold.decorators import action, display
 from utils.admin import ModelAdmin
-
+from django.shortcuts import redirect
 
 
 
@@ -140,8 +140,10 @@ class ProductVariantInLine(StackedInline):
     show_change_link = True
     tab = True
     min_num = 1
+    readonly_fields = ['price']
     # inlines = [DetailModelInLine]
     autocomplete_fields = ['product_attributes', 'in_pack_items', 'images', 'details']
+    fields = ['images', 'video','input_price', 'min_price',  'currency', 'price', 'discount','in_stock', 'color', 'product_attributes', 'in_pack_items', 'details','sell']
     # search_fields = ['']
     
     
@@ -156,6 +158,7 @@ class ProductVariantAdmin(ModelAdmin, ImportExportModelAdmin):
     export_form_class = ExportForm
     autocomplete_fields = ['product_attributes', 'images', 'in_pack_items', 'details']
     warn_unsaved_form = True
+    readonly_fields = ['price']
     # inlines = [DetailModelInLine]
 
 @admin.register(ProductModel)
@@ -169,6 +172,7 @@ class ProductModelAdmin(ModelAdmin, ImportExportModelAdmin):
     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', ]
     fieldsets = (
         ('فیلد های اصلی', {'fields': ('name', 'description',  'category', 'related_products', 'show',), "classes": ["tab"],}),
@@ -188,7 +192,7 @@ class ProductModelAdmin(ModelAdmin, ImportExportModelAdmin):
 
     def display_price(self, obj):
         if obj.variants.all().first():
-            return obj.variants.all().first().get_toman_price()
+            return obj.variants.all().first().price
     display_price.short_description = 'قیمت تومانی'
 
     @display(description='محصول', header=True)
@@ -209,6 +213,15 @@ class ProductModelAdmin(ModelAdmin, ImportExportModelAdmin):
                 # "squared": True,
             },
         ]
+
+    @action(description=f"اپدیت قیمت ها")
+    def update_products_price(self, request):
+        print('from the button')
+        ProductVariant.update_all_prices()
+        messages.success(request, f"قیمت {ProductVariant.objects.all().count()} تنوع محصول اپدیت شد")
+        return redirect("admin:product_productmodel_changelist")
+
+
     # @display(
     #     description=("نمایش در صفحه ی اصلی"),
     #     label={