Improve form behaviour to allow removing of document:

* add button to remove document ;
* fix error when document is removed ;

Form/StoredObjectType.php

@@ -10,14 +10,25 @@ use Symfony\Component\OptionsResolver\OptionsResolver;
 use Symfony\Component\Form\Extension\Core\Type\HiddenType;
 use Chill\DocStoreBundle\Entity\StoredObject;
 use Symfony\Component\Form\CallbackTransformer;
+use Doctrine\ORM\EntityManagerInterface;
 
 /**
- * 
+ * Form type which allow to join a document 
  *
- * @author Julien Fastré <julien.fastre@champs-libres.coop>
  */
 class StoredObjectType extends AbstractType
 {
+    /**
+     *
+     * @var EntityManagerInterface
+     */
+    protected $em;
+    
+    public function __construct(EntityManagerInterface $em)
+    {
+        $this->em = $em;
+    }
+    
     public function buildForm(FormBuilderInterface $builder, array $options)
     {
         $builder
@@ -86,6 +97,9 @@ class StoredObjectType extends AbstractType
         }
         
         if (NULL === $object->getFilename()) {
+            // remove the original object
+            $this->em->remove($object);
+            
             return null;
         }