用于移除数组中对象的array_pop

Question

我有一个要从其中获取数组的类。

$attributeTypeOfProducts= $Attributetypes::with('cars')->get();

我想使用array_pop方法删除数组的最后一条记录，但它给出了以下错误

Indirect modification of overloaded element of App\\Models\\Attributetypes has no effect

我做了下面的

$pc=0;
$popcount =0;
for( $i = 0; $i < count($attributeTypeOfProducts); $i++){ 

 for($pc=0; $pc<5; $pc++)
             {
                 
               
                array_pop($attributeTypeOfProducts[$i]['cars']);
               
             }



}


                    Response of the class

{
    "id": 1,
    "name": "cars",
    "car_id": 123443221,
    "status": 1,
    "created_at": "2021-08-02T05:53:49.000000Z",
    "updated_at": "2021-08-02T05:53:49.000000Z",
    "cars": [
        {
            "id": 3,
            "attr_size_value": 14,
            "attr_image_src": "abc.png",
            "attribute_size_name": "honda",
            "attribute_type_id": 1,
            "product_id": 123443221,
            "created_at": "2021-08-02T05:53:50.000000Z",
            "updated_at": "2021-08-02T05:53:50.000000Z"
        },
        {
            "id": 4,
            "attr_size_value": 10,
            "attr_image_src": "abc.png",
            "attribute_size_name": "bullet",
            "attribute_type_id": 2,
            "product_id": 123443221,
            "created_at": "2021-08-02T05:54:28.000000Z",
            "updated_at": "2021-08-02T05:54:28.000000Z"
        },
        {
            "id": 8,
            "attr_size_value": 12,
            "attr_image_src": "abc.png",
            "attribute_size_name": "hyundai",
            "attribute_type_id": 3,
            "product_id": 123443221,
            "created_at": "2021-08-02T05:55:02.000000Z",
            "updated_at": "2021-08-02T05:55:02.000000Z"
        },
        {
            "id": 9,
            "attr_size_value": 14,
            "attr_image_src": "abc.png",
            "attribute_size_name": "city",
            "attribute_type_id": 3,
            "product_id": 123443221,
            "created_at": "2021-08-02T05:55:02.000000Z",
            "updated_at": "2021-08-02T05:55:02.000000Z"
        }
    ],
    
}

我想删除带有attribute_size_name = city的记录，但它在array_pop上崩溃了

我有一个cars关系，我想删除它的最后一条记录，但它给出了前面提到的错误

执行此$Attributetypes::with('cars')->get()->toArray()；操作后，我无法将另一个阵列推送到$attributeTypeOfProducts中

Answer 1

您可以通过使用toArray()方法将集合转换为数组来实现您的结果：

$attributeTypeOfProducts= $Attributetypes::with('cars')->get()->toArray();

您也可以使用laravel集合中的方法来完成此操作：

$attributeTypeOfProducts= $Attributetypes::with('cars')->get();

$attributeTypeOfProducts->map(function($item, $key){
    if($key < 5){
        array_pop($item['cars']);
        return $item;
    }
})