order payment model qoshildi va plan serializer error togirlandi

core/apps/orders/models/__init__.py

@@ -1,3 +1,4 @@
 from .product import *
 from .order_item import *
-from .order import *
+from .order import *
+from .payment import *

core/apps/orders/models/payment.py

@@ -0,0 +1,16 @@
+# django
+from django.db import models
+
+# shared
+from core.apps.shared.models import BaseModel
+# orders
+from core.apps.orders.models import Order
+
+
+class Payment(BaseModel):
+    order = models.ForeignKey(Order, on_delete=models.CASCADE, related_name='payments')
+    price = models.DecimalField(max_digits=15, decimal_places=2)
+    
+    def __str__(self):
+        return self.price
+