Question

我正在向服务器端发送一个对象数组，用于拖放菜单排序。我想将每个菜单项的 parent_id 和排序值更新到我的数据库中，所有根项目父项将为0，但我无法正确定义我的函数。

[
    {
        "id": 2,
        "children": [
            {
                "id": 1,
                "children": [
                    {
                        "id": 3,
                        "children": []
                    }
                ]
            }
        ]
    },
    {
        "id": 4,
        "children": [
            {
                "id": 5,
                "children": []
            }
        ]
    }
]

我试过

public static function sort($menus, $parent_id = 0)
{
    $i = 0;
    foreach ($menus as $menu) {
        $menuItem = MenuItem::find($menu['id']);
        $menuItem->parent_id = $parent_id;
        $menuItem->sort = $i;
        $menuItem->save();
        $i += $i;
        if (count($menu['children'])) {
            MenuController::sort($menus, $menu['id']);
        }
    }
}

public function postSaveMenuOrder(Request $request)
{
    if ($request->has('menu-data')) {
        $menuData = $request->get('menu-data');
        MenuController::sort($menuData);
    }
}

Answer 1

您的数组包含对象，但您尝试将它们用作数组：

public static function sort($menus, $parent_id = 0)
{
    foreach ($menus as $key => $menu) {
        $menuItem = MenuItem::find($menu->id);
        $menuItem->parent_id = $parent_id;
        $menuItem->sort = $key;
        $menuItem->save();

        if (count($menu->children)) {
            // note that here we are passing the children of the menu, 
            // not all the menus as in your example
            self::sort($menu->children, $menu->id);
        }
    }
}

您也可以使用密钥而不是$i变量。

递归更新父项和排序项值

1 个答案: