discount admin and code to name update

backend/order/serializers.py

@@ -1,7 +1,14 @@
 from rest_framework import serializers
-from .models import OrderItemModel, OrderModel
+from .models import OrderItemModel, OrderModel, DiscountCode
 from product.serializers import ProductVariantSerialzier
 
+class DiscountCodeSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = DiscountCode
+        fields = ('code', 'percent')
+        read_only_fields = ('percent',)
+
+
 class OrderItemSerailzier(serializers.ModelSerializer):
     product = serializers.SerializerMethodField()
     class Meta: