improve doc storing

Form/PersonDocumentType.php

@@ -74,6 +74,7 @@ class PersonDocumentType extends AbstractType
             ])
             ->add('date', ChillDateType::class)
             ->add('category', EntityType::class, array(
+                'placeholder' => 'Choose a document category',
                 'class' => 'ChillDocStoreBundle:DocumentCategory',
                 'query_builder' => function (EntityRepository $er) {
                     return $er->createQueryBuilder('c')

Form/StoredObjectType.php

@@ -31,14 +31,17 @@ class StoredObjectType extends AbstractType
             ->get('keyInfos')
             ->addModelTransformer(new CallbackTransformer(
                 [$this, 'transform'], [$this, 'reverseTransform']
-                ))
-            ;
+        ));
         $builder
             ->get('iv')
             ->addModelTransformer(new CallbackTransformer(
                 [$this, 'transform'], [$this, 'reverseTransform']
-                ))
-            ;
+        ));
+        
+        $builder
+            ->addModelTransformer(new CallbackTransformer(
+                [ $this, 'transformObject'], [$this, 'reverseTransformObject']
+        ));
     }
     
     public function getBlockPrefix()
@@ -70,4 +73,22 @@ class StoredObjectType extends AbstractType
         
         return \json_encode($object);
     }
+    
+    public function transformObject($object = null)
+    {
+        return $object;
+    }
+    
+    public function reverseTransformObject($object)
+    { 
+        if (NULL === $object) {
+            return null;
+        }
+        
+        if (NULL === $object->getFilename()) {
+            return null;
+        }
+        
+        return $object;
+    }
 }