perf(assets): 优化节点树

修改树策略，做读优化，写的速度降低

apps/perms/api/system_user_permission.py

@@ -1,21 +1,24 @@
-
-
 from rest_framework import generics
+from django.db.models import Q
+from django.utils.decorators import method_decorator
+
+from assets.models import SystemUser
 from common.permissions import IsValidUser
 from orgs.utils import tmp_to_root_org
 from .. import serializers
 
 
+@method_decorator(tmp_to_root_org(), name='list')
 class SystemUserPermission(generics.ListAPIView):
     permission_classes = (IsValidUser,)
     serializer_class = serializers.SystemUserSerializer
 
     def get_queryset(self):
-        return self.get_user_system_users()
-
-    def get_user_system_users(self):
-        from perms.utils import AssetPermissionUtil
         user = self.request.user
-        with tmp_to_root_org():
-            util = AssetPermissionUtil(user)
-            return util.get_system_users()
+
+        queryset = SystemUser.objects.filter(
+            Q(granted_by_permissions__users=user) |
+            Q(granted_by_permissions__user_groups__users=user)
+        ).distinct()
+
+        return queryset