diff --git a/device_management/serializers.py b/device_management/serializers.py
index b10b605..14f1bc4 100644
--- a/device_management/serializers.py
+++ b/device_management/serializers.py
@@ -33,10 +33,8 @@ class DeviceAttachmentSerializer(serializers.ModelSerializer):
 
 
 class DeviceSerializer(serializers.ModelSerializer):
-    serials = DeviceSerialSerializer(many=True, required=False)
-    ips = DeviceIPSerializer(many=True, required=False)
-    maintenance_records = MaintenanceRecordSerializer(many=True, read_only=True)
-    attachments = DeviceAttachmentSerializer(many=True, read_only=True)
+    serials = serializers.ListField(child=serializers.DictField(), required=False, write_only=True)
+    ips = serializers.ListField(child=serializers.DictField(), required=False, write_only=True)
     service_duration_days = serializers.IntegerField(read_only=True)
     is_warranty_expired = serializers.BooleanField(read_only=True)
     primary_serial = serializers.SerializerMethodField()
@@ -50,7 +48,7 @@ class DeviceSerializer(serializers.ModelSerializer):
                   'thumbnail', 'status', 'responsible_person', 'warranty_expire',
                   'service_duration_days', 'is_warranty_expired', 'primary_serial', 
                   'primary_ip', 'latest_maintenance', 'serials', 'ips', 
-                  'maintenance_records', 'attachments', 'created_at', 'updated_at']
+                  'created_at', 'updated_at']
         read_only_fields = ['created_at', 'updated_at']
 
     def get_primary_serial(self, obj):
diff --git a/device_management/views.py b/device_management/views.py
index 5443640..bd5f2cc 100644
--- a/device_management/views.py
+++ b/device_management/views.py
@@ -7,6 +7,8 @@ from rest_framework import viewsets, status, parsers, renderers
 from rest_framework.decorators import action, api_view, parser_classes
 from rest_framework.response import Response
 from rest_framework.permissions import IsAuthenticatedOrReadOnly, IsAuthenticated
+from drf_yasg.utils import swagger_auto_schema
+from drf_yasg import openapi as swagger_openapi
 from openpyxl import Workbook, load_workbook
 from openpyxl.styles import Font
 import pandas as pd