On gists

Ajax dependent selectbox

Nette Nette-Forms

example.php Raw #

<?php
// https://forum.nette.org/cs/27213-dependent-form-select-with-ajax-chyba-please-select-a-valid-option
// https://forum.nette.org/cs/32545-jak-na-vicekrokovy-formular#p207046

protected function createComponentSelectForm($name)
{
    $firstItems = [
        1 => 'First option 1',
        2 => 'First option 2'
    ];

    // Je důležité předávat formuláři $this a $name jinak by nefungovalo níže použité $firstSelect->getValue()
    $form = new \Nette\Application\UI\Form($this, $name);
    $firstSelect = $form->addSelect('first', 'First select:', $firstItems)
        ->setPrompt('Select');

    $secondItems = [0 => 'Select from first'];

    if ($firstSelect->getValue()) {
        $secondItems = [
            0 => 'Select',
            1 => 'First option ' . $value . ' - second option 1',
            2 => 'First option ' . $value . ' - second option 2'
        ];
    }

    $form->addSelect('second', 'Second select:')
         ->setItems($secondItems);

    $form->addSubmit('send', 'Submit');

    $form->onSuccess[] = [$this, 'processSelectForm'];

    return $form;
}