代码优化

ruoyi-modules/ruoyi-workflow/src/main/java/org/dromara/workflow/flowable/listener/DeptFileApproveGroupListener.java

 package org.dromara.workflow.flowable.listener;
 
 
+import cn.hutool.core.collection.CollectionUtil;
 import lombok.extern.slf4j.Slf4j;
 import org.dromara.common.core.utils.SpringUtils;
 import org.dromara.workflow.common.constant.FlowConstant;
@@ -34,7 +35,9 @@ public class DeptFileApproveGroupListener implements TaskListener {
 
         // 调用服务获取审批人列表
         List<Long> userIds = deptService.selectUserListByFileIdAndRoleKey(fa.getSysDeptFileId(), "file_approve");
-
+        if (CollectionUtil.isEmpty(userIds)) {
+            userIds = List.of(-1L);
+        }
         // 设置候选用户
         delegateTask.setVariable("group", userIds);
     }