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[Serializer] Fix the interface/abstract classes documentation #9873

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Jun 4, 2018
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[Serializer] Fix the interface/abstract classes documentation #9873

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12 changes: 7 additions & 5 deletions components/serializer.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -1168,8 +1168,8 @@ serialize and deserialize these objects using a *"discriminator class mapping"*.

The discriminator is the field (in the serialized string) used to differentiate
between the possible objects. In practice, when using the Serializer component,
pass the :class:`Symfony\\Component\\Serializer\\Mapping\\ClassDiscriminatorResolver`
to the :class:`Symfony\\Component\\Serializer\\Normalizer\\ObjectNormalizer`.
pass a :class:`Symfony\\Component\\Serializer\\Mapping\\ClassDiscriminatorResolverInterface`
implementation to the :class:`Symfony\\Component\\Serializer\\Normalizer\\ObjectNormalizer`.

Consider an application that defines an abstract ``CodeRepository`` class
extended by ``GitHubCodeRepository`` and ``BitBucketCodeRepository`` classes.
Expand All @@ -1178,18 +1178,20 @@ This example shows how to serialize and deserialize those objects::
// ...
use Symfony\Component\Serializer\Encoder\JsonEncoder;
use Symfony\Component\Serializer\Mapping\ClassDiscriminatorMapping;
use Symfony\Component\Serializer\Mapping\ClassDiscriminatorResolver;
use Symfony\Component\Serializer\Mapping\ClassDiscriminatorFromClassMetadata;
use Symfony\Component\Serializer\Normalizer\ObjectNormalizer;
use Symfony\Component\Serializer\Serializer;

$discriminator = new ClassDiscriminatorResolver();
$classMetadataFactory = new ClassMetadataFactory(new AnnotationLoader(new AnnotationReader()));

$discriminator = new ClassDiscriminatorFromClassMetadata($classMetadataFactory);
$discriminator->addClassMapping(CodeRepository::class, new ClassDiscriminatorMapping('type', [
'github' => GitHubCodeRepository::class,
'bitbucket' => BitBucketCodeRepository::class,
]));

$serializer = new Serializer(
array(new ObjectNormalizer(null, null, null, null, $discriminator)),
array(new ObjectNormalizer($classMetadataFactory, null, null, null, $discriminator)),
array('json' => new JsonEncoder())
);

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