first commit

apps/order/selector.py

@@ -0,0 +1,12 @@
+from apps.order.models import Order as OrderModel
+from rest_framework.exceptions import ValidationError
+
+
+def retrieve_order(order_id: int) -> OrderModel:
+    try:
+        order = OrderModel.objects.get(id=order_id)
+        return order
+    except OrderModel.DoesNotExist:
+        raise ValidationError(f"Order with id {order_id} does not exist")
+    except Exception as e:
+        raise ValidationError(f"Error retrieving order: {e}")