thetool/application/WarehouseLocation/WarehouseLocationController.php

<?php

class WarehouseLocationController extends TTCrud {
    protected string $headerTitle = 'Lagerorte';
    protected string $createText = 'Lagerort erstellen';

    protected array $columns = [
        ['key' => 'title', 'text' => 'Titel', 'required' => true],
        ['key' => 'assignedTo', 'text' => 'Zugewiesen an', 'required' => true,
         'table' => ['filter' => 'select', 'items' => []],
         'modal' => ['type' => 'select', 'items' => []]],
        ['key' => 'actions', 'text' => 'Aktionen', 'required' => false, 'modal' => false, 'table' => ['filter' => false, 'sortable' => false, 'class' => 'text-center']],
    ];

    protected array $additionalActions = [
        ['key' => 'openHistory', 'title' => 'Historie', 'class' => 'fas fa-history text-primary'],
    ];

    protected array $infoMessages = [
        'create' => 'Lagerort wurde erstellt',
        'update' => 'Lagerort wurde aktualisiert',
        'delete' => 'Lagerort wurde gelöscht',
        'noChanges' => 'Keine Änderungen',
    ];

    public function prepareCrudConfig() {
        $users = array_map(function($user) {
            return ['value' => $user->id, 'text' => $user->name];
        }, UserModel::search(['employee' => true]));

        $this->columns[1]['modal']['items'] = $users;
    }

    protected function beforeUpdate($postData): bool {
        (new WarehouseHistoryController)->create($postData, $this->mod);
        return true;
    }

    protected function getHistoryAction() {
        $this->prepareCrudConfig();
        self::returnJson((new WarehouseHistoryController)->getHistory($this->request->id, $this->mod, $this->columns));
    }

}