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Aug 3, 2020
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Add public typed properties autowiring #13851

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25 changes: 23 additions & 2 deletions service_container/autowiring.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -530,8 +530,8 @@ You wire up the difficult arguments, Symfony takes care of the rest.

.. _autowiring-calls:

Autowiring other Methods (e.g. Setters)
---------------------------------------
Autowiring other Methods (e.g. Setters and Public Typed Properties)
-------------------------------------------------------------------

When autowiring is enabled for a service, you can *also* configure the container
to call methods on your class when it's instantiated. For example, suppose you want
Expand Down Expand Up @@ -562,6 +562,27 @@ Autowiring will automatically call *any* method with the ``@required`` annotatio
above it, autowiring each argument. If you need to manually wire some of the arguments
to a method, you can always explicitly :doc:`configure the method call </service_container/calls>`.

Despite property injection has some :ref:`drawbacks <property-injection>`, autowiring with ``@required`` annotation
can also be applied to public typed properties::

namespace App\Util;

class Rot13Transformer
{
/** @required */
public LoggerInterface $logger;

public function transform($value)
{
$this->logger->info('Transforming '.$value);
// ...
}
}

.. versionadded:: 5.1

Public typed properties autowiring was introduced in Symfony 5.1.

Autowiring Controller Action Methods
------------------------------------

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2 changes: 2 additions & 0 deletions service_container/injection_types.rst
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Expand Up @@ -295,6 +295,8 @@ The disadvantages of setter injection are:
* You cannot be sure the setter will be called and so you need to add checks
that any required dependencies are injected.

.. _property-injection:

Property Injection
------------------

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