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2013-09-18T19:04:40.467
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2013-09-18T19:18:07.713
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Ok, that's simple: In my question I was assuming that the DataTransformer will be "magically" invoked, but it's instanced while building the form, so if it helps to anyone, here it is: <ol> <li>In the DataTransformer class (implementing the DataTransformerInterface): <ol> <li>Define the new class attributes in order to hold the dependency injection: <pre><code>/** * @var EntityManager */ private $entityManager; /** * @var \Symfony\Component\DependencyInjection\Container */ private $container; </code></pre></li> <li>Define the constructor like: <pre><code>public function __construct( EntityManager $entityManager, Container $container ) { $this->entityManager = $entityManager; $this->container = $container; } </code></pre></li> </ol></li> <li>In your form class (implementing the AbstractType) <ol> <li>Add the following calls to the setDefaultOptions method: <pre><code>$resolver->setRequired( array( 'em', 'container' ) ); $resolver->setAllowedTypes( array( 'em' => 'Doctrine\Common\Persistence\ObjectManager', 'container' => 'appDevDebugProjectContainer', ) ); </code></pre></li> <li>In the buildForm method, apply the transformer as defined in the <a href="http://symfony.com/doc/current/cookbook/form/data_transformers.html" rel="nofollow">transformer recipe</a> but instance it as: <pre><code>$entityManager = $options['em']; $container = $options['container']; $transformer = new FantasticTransformer( $entityManager, $container ); </code></pre></li> </ol></li> <li>In your controller, when you're calling to the createForm method, is it possible to inject the EntityManager and the Container instances simply adding them as follows: <pre><code> $form = $this->createForm( 'your_form', $lookup, array( 'action' => $this->generateUrl( 'your_action_url' ), 'em' => $this->getDoctrine()->getManager(), 'container' => $this->container ) ); </code></pre></li> <li>Now, you can finally get the client IP from the request service calling to the container defined in the constructor of your DataTransformer class: <pre><code>$ip = $this->container->get('request')->getClientIp(); </code></pre></li> </ol> Note that we're injecting the container instead of the request instance, it's due to the <a href="http://symfony.com/doc/current/cookbook/service_container/scopes.html" rel="nofollow">Symfony scopes</a>.
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