无限级分类，无限级菜单显示，预加载导致未授权的也显示出来

使用ORM预加载进行无限级树状，对于不需要权限控制的菜单显示，列表显示完全没问题
那我的菜单假如根据授予的权限控制的，子递归里面没办法去除不在权限内的

class role {
    ....
    public function getTreePermission()
    {
        // $this->permissions()定义了一个多对多的关系
        return $this->permissions()->with('childrenPermissions')
            ->whereNull('pid')
            ->orderBy('weight', 'desc')
            ->getResults();
    }
}

class Permission {
    ....
    public function children() 
    {
        return $this->hasMany(config('permission.models.permission'), 'pid', 'id');
    }

    public function childrenPermissions()
    {
        return $this->children()->with('childrenPermissions')->orderBy('weight', 'desc');
    }
}

我的rbac里节点，id为4和7的权限都没有分配给role，但是仍然显示出来了

{
    "status": 0,
    "message": "Success",
    "data": [
        {
            "id": 1,
            "name": "permission",
            "display_name": "权限管理",
            "pid": null,
            "weight": 0,
            "is_menu": 1,
            "children_permissions": [
                {
                    "id": 3,
                    "name": "permission.user",
                    "display_name": "用户管理",
                    "pid": 1,
                    "weight": 0,
                    "is_menu": 1,
                    "children_permissions": [
                        {
                            "id": 7,
                            "name": "permission.user.edit",
                            "display_name": "编辑用户",
                            "pid": 3,
                            "weight": 2,
                            "is_menu": 0,
                            "children_permissions": []
                        },
                        {
                            "id": 6,
                            "name": "permission.user.view",
                            "display_name": "查看用户列表",
                            "pid": 3,
                            "weight": 1,
                            "is_menu": 0,
                            "children_permissions": []
                        }
                    ]
                },
                {
                    "id": 4,
                    "name": "permission.role",
                    "display_name": "角色管理",
                    "pid": 1,
                    "weight": 0,
                    "is_menu": 1,
                    "children_permissions": []
                }
            ]
        }
    ]
}