Jun 21, 2018 · Jun 21, 2018 · Jul 16, 2018
diff --git a/components/serializer.rst b/components/serializer.rst
    Support for the ``allow_extra_attributes`` key in the context was introduced
    in Symfony 3.3.

 By default, additional attributes that are not mapped to the denormalized
 object will be ignored by the Serializer component. Set the ``allow_extra_attributes``
 key of the deserialization context to ``false`` to let the serializer throw
 an exception when additional attributes are passed::
 By default, additional attributes that are not mapped to the denormalized object
 will be ignored by the Serializer component. If you prefer to throw an exception
 when this happens, set the ``allow_extra_attributes`` context option to
 ``false`` and provide an object that implements ``ClassMetadataFactoryInterface`
 when constructing the normalizer::

    $data = <<<EOF
    <person>

    // this will throw a Symfony\Component\Serializer\Exception\ExtraAttributesException
    // because "city" is not an attribute of the Person class
    $classMetadataFactory = new ClassMetadataFactory(new AnnotationLoader(new AnnotationReader()));
    $normalizer = new ObjectNormalizer($classMetadataFactory);
    $serializer = new Serializer(array($normalizer));
    $person = $serializer->deserialize($data, 'Acme\Person', 'xml', array(
        'allow_extra_attributes' => false,
    ));
Original file line number	Diff line number	Diff line change
Expand Up		@@ -169,10 +169,11 @@ needs three parameters:
		Support for the ``allow_extra_attributes`` key in the context was introduced
		in Symfony 3.3.

		By default, additional attributes that are not mapped to the denormalized
		object will be ignored by the Serializer component. Set the ``allow_extra_attributes``
		key of the deserialization context to ``false`` to let the serializer throw
		an exception when additional attributes are passed::
		By default, additional attributes that are not mapped to the denormalized object
		will be ignored by the Serializer component. If you prefer to throw an exception
		when this happens, set the ``allow_extra_attributes`` context option to
		``false`` and provide an object that implements ``ClassMetadataFactoryInterface`
		when constructing the normalizer::

		$data = <<<EOF
		<person>
Expand All		@@ -184,6 +185,9 @@ an exception when additional attributes are passed::

		// this will throw a Symfony\Component\Serializer\Exception\ExtraAttributesException
		// because "city" is not an attribute of the Person class
		$classMetadataFactory = new ClassMetadataFactory(new AnnotationLoader(new AnnotationReader()));
		$normalizer = new ObjectNormalizer($classMetadataFactory);
		$serializer = new Serializer(array($normalizer));
		$person = $serializer->deserialize($data, 'Acme\Person', 'xml', array(
		'allow_extra_attributes' => false,
		));
Expand Down