Row interface ala Rowable

[h4kuna]

The goal is create Empty object if data is not defined.

Example:

Actual behavior, we must define nullabble return type

Model:

public function loadPageById(int $pageId): ?Database\Row
{
    return $this->table()
        ->where('pw.id', $pageId)
        ->select(['title' => 'pwl.title', 'text' => 'pwl.text'])
        ->fetch();
}

Presenter:

$page = $model->loadPageById($pageTypeId);
$template = $this->getTemplate();
if ($page === NULL) {
    $template->text = NULL;
    $template->title = NULL;
} else {
    $template->text = $page->text;
    $template->title = $page->title;
}

---

This update allow this: return object everytime

public function loadPageById(int $pageId): Rowable
{
    $row = $this->table()
        ->where('pw.id', $pageId)
        ->select(['title' => 'pwl.title', 'text' => 'pwl.text'])
        ->fetch();
    if ($row === NULL) {
        $row = new DummyRow([
            'title' => NULL,
            'text' => '' // here for example i want empty string
        ]);
    }
    return $row;
}

Presenter:

$page = $model->loadPageById($pageTypeId);
$template = $this->getTemplate();
$template->text = $page->text;
$template->title = $page->title;

[forrest79]

Idea is good. This could be already done without Rowable interface. DummyRow extends Row and you can returning still Row. In the future, we can update Row, so it could be easily manually created, but it's already possbile now. I'm planning discuss this funcionality internally and we will see then. Thanks.