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Sep 6, 2019
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Document the validator's switch to PSR-6 #12276

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10 changes: 7 additions & 3 deletions components/validator/resources.rst
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Expand Up @@ -147,17 +147,21 @@ can slow down your application because each file needs to be parsed, validated
and converted into a :class:`Symfony\\Component\\Validator\\Mapping\\ClassMetadata`
instance.

To solve this problem, call the :method:`Symfony\\Component\\Validator\\ValidatorBuilder::setMetadataCache`
To solve this problem, call the :method:`Symfony\\Component\\Validator\\ValidatorBuilder::setMappingCache`
method of the Validator builder and pass your own caching class (which must
implement :class:`Symfony\\Component\\Validator\\Mapping\\Cache\\CacheInterface`)::
implement the PSR-6 interface :class:`Psr\\Cache\\CacheItemPoolInterface`)::

use Symfony\Component\Validator\Validation;

$validator = Validation::createValidatorBuilder()
// ... add loaders
->setMetadataCache(new SomeImplementCacheInterface());
->setMappingCache(new SomePsr6Cache());
->getValidator();

.. versionadded:: 4.4

Support for PSR-6 compatible mapping caches was introduced in Symfony 4.4.

.. note::

The loaders already use a singleton load mechanism. That means that the
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