laravel 手动获取created_at update_at

今天手动获取created_at进行操作时意外的发现获取不到，获取到的结果为"2019-05-15T14:09:01.000000Z"很奇怪，手动搜索发现如下解决方式！
问题代码

public function data()
    {
        $goods=Good::with('category')->get();
        $data = [];
        foreach ($goods as $k => $item) {
            $temp['id'] = $item->id;
            $temp['name'] = $item->name;
            $temp['created_at'] = $item->created_at;
            $temp['photo'] = $item->photo;
            $temp['sort'] = $item->sort;
            $temp['category'] = $item->category->name;
            $data[] = $temp;
        }
        return $data;
    }

显示结果为

image.png

解决方式在模型添加如下代码

 protected $casts = array('created_at' => 'created_at','updated_at'=>'updated_at');

image.png

成功解决