[Serializer] Allow to pass a single value for the groups opt

dunglas · dunglas · commit 5e0a91e53b91 · 2018-09-10T17:24:01.000+02:00
diff --git a/components/serializer.rst b/components/serializer.rst
@@ -337,7 +337,7 @@ You are now able to serialize only attributes in the groups you want::
     $normalizer = new ObjectNormalizer($classMetadataFactory);
     $serializer = new Serializer(array($normalizer));
 
-    $data = $serializer->normalize($obj, null, array('groups' => array('group1')));
+    $data = $serializer->normalize($obj, null, array('groups' => 'group1'));
     // $data = array('foo' => 'foo');
 
     $obj2 = $serializer->denormalize(
diff --git a/serializer.rst b/serializer.rst
@@ -130,9 +130,13 @@ to your class and choose which groups to use when serializing::
 
     $json = $serializer->serialize(
         $someObject,
-        'json', array('groups' => array('group1'))
+        'json', array('groups' => 'group1')
     );
 
+.. note::
+
+    The value of the ``groups`` key can be a single string, or an array of strings.
+
 In addition to the ``@Groups`` annotation, the Serializer component also
 supports YAML or XML files. These files are automatically loaded when being
 stored in one of the following locations:
