title: Symfony 3 - Could not load type form type
body: <p>I have just updated symfony from 2.7 to 3.0 and got some troubles with it..</p>
  
  <p>It cant load my form types. Here is an example.</p>
  
  <p>services.xml</p>
  
  <pre><code>app.search:
          class: AppBundle\Form\Type\SearchFormType
          tags:
              - { name: form.type, alias: app_search }
  </code></pre>
  
  <p>Thats how im trying to create form.</p>
  
  <pre><code>$form = $this-&gt;createForm('app_search', new Search());
  </code></pre>
  
  <p>SearchFormType</p>
  
  <pre><code>namespace AppBundle\Form\Type;
  
  use Symfony\Component\Form\AbstractType;
  use Symfony\Component\Form\FormBuilderInterface;
  
  class SearchFormType extends AbstractType
  {
      public function buildForm(FormBuilderInterface $builder, array $options)
      {
      $builder-&gt;add('phrase', 'text');
      }
  
      public function getBlockPrefix()
      {
          return 'app_search';
      }
  }
  </code></pre>
  
  <p>Getting next error:</p>
  
  <blockquote>
    <p>An exception has been thrown during the rendering of a template
    ("Could not load type "app_search"") in ....</p>
  </blockquote>
  
  <p>How it should look like in symfony 3.0? </p>
  
  <p>Thanks !</p>