数据表Yajra Laravel Html Builder-添加归属到/搜索列

Question

我需要向Yajra数据表添加具有（BelongsTo）关系的列。

我添加了一个新列，但搜索无效。

如何使用HTML BUILDER添加具有关系的列？

这是数据库中的“证书”表（截图）

任何帮助将不胜感激。最好的祝福。

我在Datatables/CertificatesDataTable.php中的代码

namespace App\DataTables;

use App\Certificate;
use Yajra\DataTables\Services\DataTable;

class CertificatesDataTable extends DataTable
{
    /**
     * Build DataTable class.
     *
     * @param mixed $query Results from query() method.
     * @return \Yajra\DataTables\DataTableAbstract
     */
    public function dataTable($query)
    {

        return datatables($query)
            ->addColumn('worker_name', function ($certificate) {
              $certificate = Certificate::findOrFail($certificate->id);
              return $certificate->worker->name;
            })
            ->setRowClass(function ($certificate) {

                if ($certificate->date_next < date('Y-m-d')) {

                  return 'barred';

                } elseif ($certificate->date_next <= date('Y-m-d', strtotime('+ 10 days'))) {

                  return 'expired';

                }

            })
            ;
    }

    /**
     * Get query source of dataTable.
     *
     * @param \App\Certificate $model
     * @return \Illuminate\Database\Eloquent\Builder
     */

    public function query(Certificate $model)
    {
        return $model->newQuery()->select
        (
            'id', 
            'number',
            'date_create',
            'date_next'
        );

    }

    /**
     * Optional method if you want to use html builder.
     *
     * @return \Yajra\DataTables\Html\Builder
     */
    public function html()
    {
    return $this->builder()
        ->columns([
            ['data' => 'id', 'title' => 'ID', 'width' => '5%'], 
            ['data' => 'number', 'title' => 'Number certificate'],
            ['data' => 'worker_name', 'title' => 'Worker name'],
            ['data' => 'date_create', 'title' => 'Date create'],
            ['data' => 'date_next', 'title' => 'Date next']
        ])
        ->parameters([
            'dom'   => 'lftBipr',
            'order' => [ [0, 'desc'] ],
            'buttons' => [
                [
                    'extend'  => 'collection',
                    'text'    => '<i class="fa fa-print"></i> Export/Print',
                    'buttons' => [
                        'excel',
                        'print'
                    ]
                ]
            ],
            'language' => [
                'url' => url('//cdn.datatables.net/plug-ins/1.10.16/i18n/English.json')
            ]
        ]);
    }

    /**
     * Get columns.
     *
     * @return array
     */
    protected function getColumns()
    {
        return [
            'id', 
            'number',
            'date_create',
            'date_next'
        ];
    }

    /**
     * Get filename for export.
     *
     * @return string
     */
    protected function filename()
    {
        return 'Certificate_' . date('Y-m-d/H-i');
    }
}

我在模板中使用{!! $dataTable->table() !!}和{!! $dataTable->scripts() !!}。