How should I inject?

Constructor injection

public function __construct(IMailer $mailer)

Method injection (inject* method)

public function injectMailer(IMailer $mailer)

Property injection (@inject annotation)

/** @var \Nette\Mail\IMailer @inject */
public $mailer;

What should I use?	Presenter	Service	Component with factory
Constructor	¹⁾
Inject method	³⁾	²⁾	²⁾ ³⁾
@inject	³⁾

1) only in the final presenters, not in the BasePresenter

2) it is required to enable this using inject: true in service definition in your neon file

3) only for the BasePresenter or the BaseControl, Prefer constructor injection elsewhere

- recommended

- you can use this

- avoid this

- do not use

What should I inject?

(declared class/interface inject according to the left column)

Cache (doc)

//$storage contains IStorage
$cache = new Nette\Caching\Cache($storage);
$cache->load($key);

HTTP (doc)

HTTP Request Nette\Http\IRequest

HTTP Response Nette\Http\IResponse

Mailing (doc)

//$mailer contains IMailer
$message = new Nette\Mail\Message();
$message->addTo($to);
...
$mailer->send($message);

Session (doc)

//$session contains Session
$section = $session->getSection($mySection);
$section->key = $value;

Database (doc)

User and security (doc)

Application

constructUrl($appRequest, $refUrl) - creates URL for given application request

Templates

createTemplate($control = NULL) - creates template you know from the presenter