fix

core/apps/orders/migrations/0009_alter_orderitem_quantity.py

@@ -0,0 +1,18 @@
+# Generated by Django 5.2 on 2025-09-06 17:05
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('orders', '0008_alter_order_payment_type'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='orderitem',
+            name='quantity',
+            field=models.FloatField(),
+        ),
+    ]

core/apps/orders/models/order.py

@@ -37,7 +37,7 @@ class Order(BaseModel):
 
 class OrderItem(BaseModel):
     order = models.ForeignKey(Order, on_delete=models.CASCADE, related_name='items')
-    quantity = models.PositiveIntegerField()
+    quantity = models.FloatField()
     price = models.PositiveBigIntegerField()
     product = models.ForeignKey(Product, on_delete=models.CASCADE, related_name='items', null=True)
 

core/apps/orders/serializers/order.py

@@ -10,7 +10,7 @@ from core.apps.orders.tasks.order_item import send_orders_to_tg_bot
 
 class OrderItemCreateSerializer(serializers.Serializer):
     product_id = serializers.UUIDField()
-    quantity = serializers.IntegerField()
+    quantity = serializers.FloatField()
 
     def validate(self, data):
         product = Product.objects.filter(id=data['product_id']).first()