trait that uses eloquent to convert any array to select2 plugin data source: https://select2.org/data-sources/formats

Select2Formatter.php

<?php

namespace App\Traits;

trait Select2Formatter
{
    /**
     * Format your array to the format used by select2 plugin using eloquent
     *
     * @param array $data 
     * @param string $text 
     * @param array $selectedIds
     */
    public function formatToSelect2DataSource(array $data, string $text,  array $selectedIds = [])
    {
        $collection = collect($data);

        $source = $collection->map(function ($value) use ($text, $selectedIds) {
            $is_selected = in_array($value['id'], $selectedIds);

            return [
                'id' => $value['id'],
                'text' => $value[$text],
                'selected' => $is_selected
            ];
        });

        return response()->json([
            'results' => $source
        ]);
    }
}