fix: playbook 批量删除 500 (#11022)

Co-authored-by: feng <1304903146@qq.com>

apps/ops/api/playbook.py

@@ -4,6 +4,7 @@ import zipfile
 
 from django.conf import settings
 from django.shortcuts import get_object_or_404
+from django.utils.translation import ugettext_lazy as _
 from rest_framework import status
 
 from common.exceptions import JMSException
@@ -12,7 +13,6 @@ from rbac.permissions import RBACPermission
 from ..exception import PlaybookNoValidEntry
 from ..models import Playbook
 from ..serializers.playbook import PlaybookSerializer
-from django.utils.translation import ugettext_lazy as _
 
 __all__ = ["PlaybookViewSet", "PlaybookFileBrowserAPIView"]
 
@@ -33,7 +33,6 @@ class PlaybookViewSet(OrgBulkModelViewSet):
     search_fields = ('name', 'comment')
 
     def perform_destroy(self, instance):
-        instance = self.get_object()
         if instance.job_set.exists():
             raise JMSException(code='playbook_has_job', detail={"msg": _("Currently playbook is being used in a job")})
         instance_id = instance.id