fix bug of ranvher nmional code key in transaction

apps/warehouse/pos/api/v1/serializers.py

@@ -123,6 +123,7 @@ class InventoryQuotaSaleTransactionSerializer(serializers.ModelSerializer):
         items_data = self.context['request'].data['items']
         with atomic():
             # get rancher with national code
+            if 'rancher_national_code' in validated_data.keys():
                 rancher = Rancher.objects.get(national_code=validated_data.pop('rancher_national_code'))
                 validated_data.update({'rancher': rancher})