how to pass data from createComponent totemplate in Version 3.0?

You're trying to render $test variable before it is assigned to template. It's because your createComponentTestForm method is called with {control testForm} in the template, which happens after DUMPTEST >{$test}<.

Assign the $test variable in action or render method, not in createComponent.

Imho nothing changed in 3.0 in components creation. createComponent* method is called first time it's used. When form is sent then latest moment is in handle* call stage, when form is rendered it's in template. In case it's first time used in template is template variable assignment done too late. That's why you should do only stuff directly related to component in createComponent* methods. But you can also initialize component sooner, just by calling $this['testForm'], e.g. in beforeRender()

hi, i try to study
pla.nette.org/cs/best-practise-formulare-jako-komponenty

i am able to create a form with a factory

but when i tray wrap the form in UI\Control i have a problem with attaching this component to presenter

i get message Component of type ‘App\Forms\TranslateFormFactory’ is not attached to ‘Nette\Application\UI\Presenter’

component:

<?php
class TranslateFormFactory extends UI\Control	{

	private $database;

	public function __construct(Nette\Database\Connection $database)	{
		$this->database = $database;
	}

	protected function attached($presenter): void	{

		parent::attached($presenter);

	}

	public function create()	{
		$form = new UI\Form;
		// mohu použít $this->database

		$form->addText('vosel', 'KozelX');
		$form->addSubmit('send', 'Odeslat');
		$form->onSuccess[] = [$this, 'processForm'];

		$this->template->kozel = 'Vosel';


		return $form;
	}

	public function processForm($form)	{

		dump($form->values); exit;

	}
}


/** rozhranní pro generovanou továrničku */
interface ITranslateFormFactory	{

	/** @return TranslateFormFactory */
	function create();
}
?>

and presenter:

<?php
final class HomepagePresenter extends BasePresenter	{

	/** @var Forms\TranslateFormFactory @inject */
	public $translateFormFactory;

	protected function createComponentTranslateForm()	{
		$control = $this->translateFormFactory->create();
		$control->onSuccess[] = function (UI\Form $form) {
			$this->redirect('this');
		};

		return $control;
	}
}
?>

i am not sure, if i undestand the section with onCategorySave() method

thank you !!

You're probably misunderstanding the concepts of Control components and their factory interfaces.

Control component allows you to create re-usable parts of your application. Same as presenter, it provides you with core functionalities of nette/component-model. Each presenter is basically a component too. Control is an isolated pice of UI, that can be easily rendered in any presenter. The factory interface takes the role of a service in Dependency Injection Container where Nette uses its create method to create an instance of your component.

So if I have a component MyComponent and a factory interface MyComponentFactory, then Nette de-facto calls new MyComponent() while implementing the factory's create method. The component class itself don't have to have the create method.

Then, inside the component, you can create and attach other components (also forms), make redirects, create and handle signals etc.

Reviewing your code, it should look something like this:

FormWrapper.php

class FormWrapper extends UI\Control
{

	private $database;

	public function __construct(Nette\Database\Connection $database)
	{
		$this->database = $database;
	}

	public function render()
	{
		$this->template->kozel = 'Vosel';
		$this->template->render(__DIR__ . '/templates/formWrapper.latte')
	}

	protected function createComponentForm()
	{
		$form = new UI\Form;
		$form->addText('vosel', 'KozelX');
		$form->addSubmit('send', 'Odeslat');
		$form->onSuccess[] = [$this, 'processForm'];
		return $form;
	}

	public function processForm($form)
	{
		bdump($form->values);
		$this->presenter->redirect('this');
	}

}

templates/formWrapper.latte

In component template, you render UI\Form.

{control form}

FormWrapperFactory.php

interface FormWrapperFactory
{

	/**
	 * @return FormWrapper
	 */
	public function create();

}

HomepagePresenter.php

final class HomepagePresenter extends BasePresenter
{

	/** @var FormWrapperFactory @inject */
	public $formWrapperFactory;

	protected function createComponentFormWrapper()
	{
		return $this->formWrapperFactory->create();
	}

}

templates/Homepage/default.latte

In presenter template you render UI\Control which wraps and renders UI\Form created inside of it.

{block content}
{control formWrapper}

For further info, please refer to components docs.

Last edited by teekey99 (2019-12-19 23:47)

perfect !

many thanks for ypour help

now i have a little knowledge about factories i try some modifications and it clear

but last (I HOPE) questuion is
how to pass parameters to a form ?

for example i have form with some table rows nazev_cz and nazev_en
and i need to call form with parameter $tb_name

in template
{control translateForm, $tb_name}

is thos right way and where can i this parameter catch ?

thank you !!