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    <p>You can do this by <a href="http://symfony.com/doc/current/book/service_container.html#referencing-injecting-services" rel="nofollow">"Referencing (Injecting) Services"</a>. In your case you want to inject the Request which is a <a href="http://symfony.com/doc/current/cookbook/service_container/scopes.html#using-a-service-from-a-narrower-scope" rel="nofollow">service from a narrower scope</a>. </p> <p>If you are using transformers, you are probably already using a Custom Form Type, and are instantiating the Data Transformer within your Form Type <strong>BuildForm</strong> Method, see <a href="http://symfony.com/doc/current/cookbook/form/data_transformers.html#using-the-transformer" rel="nofollow">here</a> for more info. </p> <p>You want to inject the Request object to the custom Form Type, then it can passed to the Data Transformer as a constructor parameter. </p> <p>To do this modify the <code>services.yml</code> file with in your bundle, and add a constructor to the Custom Form Type and the Custom Data Transformer like this:</p> <pre><code>// src/Acme/HelloBundle/Resources/config/services.yml parameters: // ... services: acme.type.custom_type: class: Acme\HelloBundle\Form\Type\CustomType scope: request arguments: ["@doctrine.odm.mongodb.document_manager", "@request"] tags: - { name: form.type, alias: custom_type } </code></pre> <p>The update the CustomType Class like this:</p> <pre><code>&lt;?php // src/Acme/HelloBundle/Form/Type/CustomType.php namespace Acme\HelloBundle\Form\Type; use Symfony\Component\HttpFoundation\Request; use Symfony\Component\Form\AbstractType; use Symfony\Component\Form\FormBuilderInterface; use Symfony\Component\OptionsResolver\OptionsResolverInterface; use Doctrine\ODM\MongoDB\DocumentManager; use Acme\HelloBundle\Form\DataTransformer\CustomDataTransformer; class CustomType extends AbstractType { private $request; private $dm; public function __construct(DocumentManager $dm, Request $request) { $this-&gt;dm = $dm; $this-&gt;request = $request; } public function buildForm(FormBuilderInterface $builder, array $options) { // Create a new Data Transformer that will be able to use the Request Object! $transformer = new CustomDataTransformer($this-&gt;dm, $this-&gt;request); $builder-&gt;addModelTransformer($transformer); } // ... } </code></pre> <p>and finally add a constructor to the transformer similar to the one added in the Form Type:</p> <pre><code>&lt;?php // src/Acme/HelloBundle/Form/DataTransformer/CustomDataTransformer.php namespace Acme\HelloBundle\Form\DataTransformer; use Symfony\Component\HttpFoundation\Request; use Symfony\Component\Form\DataTransformerInterface; use Doctrine\ODM\MongoDB\DocumentManager; class CustomDataTransformer implements DataTransformerInterface { private $request; private $dm; public function __construct(DocumentManager $dm, Request $request) { $this-&gt;dm = $dm; $this-&gt;request = $request; } // ... } </code></pre> <p>Notice that along with the Request I have injected the MongoDB DocumentManager, this is to show that multiple objects can be injected.</p>
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    1. POGet request service from a DataTransformer class
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    1. POGet request service from a DataTransformer class
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    1. COThanks for your answer, I'll do it like you're suggesting instead of using the method described in my own answer. I only have 1 question about it: Is it better to inject the Request object and set the service scope to request than inject the Container object and then get the request service?
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      1. USJavier Ferrer González
    2. COSymfony2 provides the Service Container as a way to manage the instantiation of services (objects), that way you don't have to re-write your code if you where to re-use your Custom Form Type elsewhere. Also note that you could inject the DI container to your Custom Form Type using this method see http://stackoverflow.com/questions/12056178/how-to-access-service-container-in-symfony2-global-helper-function-service. But try not to rely on having the DI container as it will make your code less reusable, see http://bit.ly/PKqPj7.
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    3. COLow coupling level, I got it! thanks a lot Onema!
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