From 3e74be7087c23693eb293fd3acad0ff982859e67 Mon Sep 17 00:00:00 2001
From: Your Name <your.email@example.com>
Date: Tue, 20 Jan 2026 13:50:04 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0getAllChildDeptIds=E6=96=B9?=
 =?UTF-8?q?=E6=B3=95=E8=8E=B7=E5=8F=96=E6=89=80=E6=9C=89=E5=AD=90=E9=83=A8?=
 =?UTF-8?q?=E9=97=A8ID?=
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---
 .../designhub/service/DepartmentService.java  | 24 +++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/backend/src/main/java/com/designhub/service/DepartmentService.java b/backend/src/main/java/com/designhub/service/DepartmentService.java
index 743af82..df0c9cc 100644
--- a/backend/src/main/java/com/designhub/service/DepartmentService.java
+++ b/backend/src/main/java/com/designhub/service/DepartmentService.java
@@ -592,6 +592,30 @@ public class DepartmentService {
         return children;
     }
     
+    /**
+     * 获取部门的所有子部门ID（递归）
+     */
+    public List<Long> getAllChildDeptIds(Long deptId) {
+        List<Long> result = new ArrayList<>();
+        if (deptId == null) {
+            return result;
+        }
+        
+        // 查找直接子部门
+        List<Department> children = departmentMapper.selectList(
+            new LambdaQueryWrapper<Department>()
+                .eq(Department::getParentId, deptId)
+        );
+        
+        // 递归获取所有子部门
+        for (Department child : children) {
+            result.add(child.getId());
+            result.addAll(getAllChildDeptIds(child.getId()));
+        }
+        
+        return result;
+    }
+    
     /**
      * 检查用户是否为任何部门的负责人
      */