修复BUG(框架类): serializers.py 中fields 过滤bug

dvadmin-backend/apps/vadmin/op_drf/serializers.py

@@ -1,4 +1,4 @@
-from functools import cached_property
+from django.utils.functional import cached_property
 
 from rest_framework import serializers
 from rest_framework.fields import empty