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wouterj merged 1 commit into from
Jan 16, 2022
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[Messenger] Document the validation middleware #16337

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61 changes: 61 additions & 0 deletions messenger.rst
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Expand Up @@ -1730,6 +1730,67 @@ may want to use:
],
]);

Other Middlewares
~~~~~~~~~~~~~~~~~

.. versionadded:: 4.1

The ``validation`` middleware was introduced in Symfony 4.1.

Add the ``validation`` middleware if you need to validate the message
object using the :doc:`Validator component <validator>` before handling it.
If validation fails, a ``ValidationFailedException`` will be thrown. The
:class:`Symfony\\Component\\Messenger\\Stamp\\ValidationStamp` can be used
to configure the validation groups.

.. configuration-block::

.. code-block:: yaml

# config/packages/messenger.yaml
framework:
messenger:
buses:
command_bus:
middleware:
- validation

.. code-block:: xml

<!-- config/packages/messenger.xml -->
<?xml version="1.0" encoding="UTF-8" ?>
<container xmlns="http://symfony.com/schema/dic/services"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:framework="http://symfony.com/schema/dic/symfony"
xsi:schemaLocation="http://symfony.com/schema/dic/services
https://symfony.com/schema/dic/services/services-1.0.xsd
http://symfony.com/schema/dic/symfony
https://symfony.com/schema/dic/symfony/symfony-1.0.xsd">

<framework:config>
<framework:messenger>
<framework:bus name="command_bus">
<framework:middleware id="validation"/>
</framework:bus>
</framework:messenger>
</framework:config>
</container>

.. code-block:: php

// config/packages/messenger.php
$container->loadFromExtension('framework', [
'messenger' => [
'buses' => [
'command_bus' => [
'middleware' => [
'validation',
],
],
],
],
]);

Messenger Events
~~~~~~~~~~~~~~~~

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