Maatwebsite调用数组中的成员函数all

问题描述

我正在尝试从表中生成/下载excel，但是错误不断显示Call to a member function all() on array

注意：我在这里删除了构造函数

use Illuminate\Support\Facades\DB;
use Maatwebsite\Excel\Concerns\FromCollection;
use Maatwebsite\Excel\Concerns\Exportable;


class VehicleRequestExportDestination implements FromCollection
{
    use Exportable;

    public function collection() 
    {
        $this->dateFrom = $this->dateFrom . ' 00:00:00.000';
        $this->dateto   = $this->dateto . ' 23:59:59.999';

        $query = "
        SELECT 
            SUBSTRING(destination,LOCATE('|',destination),LENGTH(destination)) AS dest,COUNT(destination) AS total 
        FROM dispatches
        WHERE
            addedDate
        BETWEEN 
            '" . $this->dateFrom . "' AND '" . $this->dateto . "' 
        GROUP BY 
            destination 
        ORDER BY 
            total DESC
        LIMIT 10";

        return DB::select($query);
    }
}

这就是我从控制器中调用的方式

return (new VehicleRequestExportDestination("2000-05-05","2030-05-05"))->download('Frequent Destination.xlsx');

是什么原因导致此问题，以及如何解决？

解决方法

似乎我缺少功能。我还需要将其转换为集合。此功能解决了我的问题。

return collect(DB::select($query));

不仅仅是返回

return DB::select($query);