refactor: 修改导航父级不能为自身或子导航

app/admin/validate/v1/NavigationItemValidate.php

@@ -3,6 +3,8 @@ declare (strict_types = 1);
 
 namespace app\admin\validate\v1;
 
+use app\admin\model\v1\SysNavigationItemModel;
+use think\facade\Db;
 use think\Validate;
 
 class NavigationItemValidate extends Validate
@@ -16,7 +18,7 @@ class NavigationItemValidate extends Validate
     protected $rule = [
         'id'        => 'require|integer',
         'nav_id'    => 'require|integer',
-        'pid'       => 'integer',
+        'pid'       => 'integer|different:id|checkPidNotBeChildren',
         'name'      => 'require|max:64',
         'icon'      => 'max:64',
         'link_type' => 'require|integer',
@@ -38,6 +40,8 @@ class NavigationItemValidate extends Validate
         'nav_id.require'            => '导航ID不能为空',
         'nav_id.integer'            => '导航ID必须为整数',
         'pid.integer'               => '父级ID必须为整数',
+        'pid.different'             => '父级ID不能为自身',
+        'pid.checkPidNotBeChildren' => '父级ID不能为自身的子导航',
         'name.require'              => '导航名称不能为空',
         'name.max'                  => '导航名称最多不能超过64个字符',
         'icon.max'                  => '图标最多不能超过64个字符',
@@ -50,6 +54,32 @@ class NavigationItemValidate extends Validate
         'status.in'                 => '状态只能是1或-1',
     ];
 
+    // 验证pid
+    protected function checkPidNotBeChildren($value, $rule, $data = [])
+    {
+        if ($value == 0) {
+            return true;
+        }
+        $table_name = (new SysNavigationItemModel)->getTable();
+        $children = Db::query(
+            preg_replace(
+                '/\s+/u', 
+                ' ',
+                "WITH RECURSIVE tree_by AS (
+                    SELECT a.id, a.pid FROM $table_name a WHERE a.id = {$data['id']}
+                    UNION ALL
+                    SELECT k.id, k.pid FROM $table_name k INNER JOIN tree_by t ON t.id = k.pid
+                )
+                SELECT id FROM tree_by WHERE id <> {$data['id']};"
+            )
+        );
+        if (!empty($children) && in_array($data['pid'], array_column($children, 'id'))) {
+            return false;
+        }
+
+        return true;
+    }
+
     // 定义场景
     protected $scene = [
         'add'  => ['nav_id', 'pid', 'name', 'icon', 'link_type', 'link', 'sort', 'blank', 'status'],