[代码优化](v2.6)：update UserController

eladmin-system/src/main/java/me/zhengjie/modules/system/rest/UserController.java

@@ -21,6 +21,7 @@ import io.swagger.annotations.ApiOperation;
 import lombok.RequiredArgsConstructor;
 import me.zhengjie.annotation.Log;
 import me.zhengjie.config.RsaProperties;
+import me.zhengjie.modules.system.domain.Dept;
 import me.zhengjie.modules.system.service.DataService;
 import me.zhengjie.modules.system.domain.User;
 import me.zhengjie.exception.BadRequestException;
@@ -79,7 +80,10 @@ public class UserController {
     public ResponseEntity<Object> query(UserQueryCriteria criteria, Pageable pageable){
         if (!ObjectUtils.isEmpty(criteria.getDeptId())) {
             criteria.getDeptIds().add(criteria.getDeptId());
-            criteria.getDeptIds().addAll(deptService.getDeptChildren(deptService.findByPid(criteria.getDeptId())));
+            // 先查找是否存在子节点
+            List<Dept> data = deptService.findByPid(criteria.getDeptId());
+            // 然后把子节点的ID都加入到集合中
+            criteria.getDeptIds().addAll(deptService.getDeptChildren(data));
         }
         // 数据权限
         List<Long> dataScopes = dataService.getDeptIds(userService.findByName(SecurityUtils.getCurrentUsername()));