add: add new field for product

core/apps/admin_panel/serializers/product.py

@@ -7,7 +7,7 @@ class AdminProductListSerializer(serializers.ModelSerializer):
     class Meta:
         model = Product
         fields = [
-            'id', 'name_uz', 'name_ru', 'image', 'category', 'price', 'description_uz', 'description_ru', 'unity', 'tg_id', 'code', 'article',
+            'id', 'name_uz', 'name_ru', 'image', 'category', 'price', 'description_uz', 'description_ru', 'unity', 'tg_id', 'code', 'article', 'quantity_left'
         ]
     
     def get_category(self, obj):
@@ -21,7 +21,7 @@ class ProductSerializer(serializers.ModelSerializer):
     class Meta:
         model = Product
         fields = [
-            'name_uz', 'name_ru', 'image', 'category', 'price', 'description_uz', 'description_ru', 'unity', 'tg_id', 'code', 'article',
+            'name_uz', 'name_ru', 'image', 'category', 'price', 'description_uz', 'description_ru', 'unity', 'tg_id', 'code', 'article', 'quantity_left'
         ]
         extra_kwargs = {
             'image': {'required':False},
@@ -29,6 +29,7 @@ class ProductSerializer(serializers.ModelSerializer):
             'price': {'required':False},
             'tg_id': {'required': False},
             'code': {'required': False},
-            'article': {'required': False}
+            'article': {'required': False},
+            'quantity_left': {'required': False},
         }
 

core/apps/orders/serializers/order.py

@@ -48,12 +48,17 @@ class OrderCreateSerializer(serializers.Serializer):
             total_price = 0
             total_price += validated_data.get('delivery_price')
             for item in order_items:
+                product = item.get("product")
                 items.append(OrderItem(
-                    product=item.get('product'),
+                    product=product,
                     price=item.get('price'),
                     quantity=item.get('quantity'),
                     order=order,
                 ))
+                if product.quantity_left > 0:
+                    product.quantity_left -= item.get('quantity')
+                    product.save()
+                
                 total_price += item.get('price')
                 send_orders_to_tg_bot.delay(
                     chat_id=item.get('product').tg_id,

core/apps/products/migrations/0007_product_quantity_left.py

@@ -0,0 +1,18 @@
+# Generated by Django 5.2 on 2025-09-05 16:57
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('products', '0006_rename_irticle_product_article'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='product',
+            name='quantity_left',
+            field=models.PositiveBigIntegerField(default=0),
+        ),
+    ]

core/apps/products/models/product.py

@@ -25,6 +25,7 @@ class Product(BaseModel):
     tg_id = models.CharField(max_length=50, null=True, blank=True)
     article = models.CharField(max_length=200, null=True, blank=True, unique=True)
     code = models.CharField(max_length=200, unique=True, null=True, blank=True)
+    quantity_left = models.PositiveBigIntegerField(default=0)
 
     def __str__(self):
         return self.name