Question

这是我的查询

$productItems = ProductItemResource::collection(ProductItem::where('pd_id', $id)->get());

查询的输出是这样的：

$output = [[
            'id' => 1,
            'serial' => "XXXXXXAA1",
            'pd_item_info' =>[
                'id' => 1,
                'quantity' => 5,
                'product_info' => [
                    'id' => 1,
                    'product_name' => 'Keyboard'
                ],
            ]
    ],[
        'id' => 2,
        'serial' => "XXXXXXAA2",
        'pd_item_info' =>[
            'id' => 2,
            'quantity' => 10,
            'product_info' => [
                'id' => 2,
                'product_name' => 'Monitor'
            ],
        ]
    ]];

这是我的病情：

    foreach ($output as $productItem) {
            return $productItem->pd_item_info->product_info['product_name'];
// IT HAS AN ERROR WHERE I CAN'T ACCESS THE OBJECT OF OBJECT

        }

为什么在使用资源时访问对象时出错？

Answer 1

结果是数组不是对象。

foreach($output as productItem) {
    return $productItem['pd_item_info']['product_info']['product_name'];
}

Answer 2

为什么要创建一个新集合？

$productItems = ProductItemResource::collection(ProductItem::where('pd_id', $id)->get());

查询结果已经是集合

ProductItem::where('pd_id', $id)->get()

Laravel Collection：如何访问对象的对象？

2 个答案: