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Merge branch '3.4' into 4.2
* 3.4: [Flex] Replace `SYMFONY_*` env vars with `APP_*` [Validator] Added documentation for Traverse constraint added requirements for {_format}
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‎reference/constraints/Traverse.rst

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Traverse
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========
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Objects do not validate nested objects by default unless explicitly using
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this constraint.
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If only specific nested objects should be validated by cascade, consider
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using the :doc:`references/constraints/Valid` instead.
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+----------------+-------------------------------------------------------------------------------------+
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| Applies to | :ref:`class <validation-class-target>` |
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+----------------+-------------------------------------------------------------------------------------+
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| Options | - `payload`_ |
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+----------------+-------------------------------------------------------------------------------------+
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| Class | :class:`Symfony\\Bridge\\Doctrine\\Validator\\Constraints\\Traverse` |
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+----------------+-------------------------------------------------------------------------------------+
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Basic Usage
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-----------
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In the following example, create three classes ``Book``, ``Author`` and
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``Editor`` that all have constraints on their properties. Furthermore,
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``Book`` stores an ``Author`` and an ``Editor`` instance that must be
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valid too. Instead of adding the ``Valid`` constraint to both fields,
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configure the ``Traverse`` constraint on the ``Book`` class.
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.. configuration-block::
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.. code-block:: php-annotations
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// src/AppBundle/Entity/Book.php
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namespace AppBundle\Entity;
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use Symfony\Component\Validator\Constraints as Assert;
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use Doctrine\ORM\Mapping as ORM;
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/**
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* @ORM\Entity
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* @Assert\Traverse
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*/
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class Book
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{
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/**
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* @var Author
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*
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* @ORM\ManyToOne(targetEntity="AppBundle\Entity\Author")
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*/
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protected $author;
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/**
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* @var Editor
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*
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* @ORM\ManyToOne(targetEntity="AppBundle\Entity\Editor")
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*/
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protected $editor;
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// ...
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}
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.. code-block:: yaml
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# src/AppBundle/Resources/config/validation.yml
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AppBundle\Entity\Book:
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constraints:
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- Symfony\Component\Validator\Constraints\Traverse: ~
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.. code-block:: xml
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<!-- src/AppBundle/Resources/config/validation.xml -->
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<?xml version="1.0" encoding="UTF-8" ?>
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<constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping https://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
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<class name="AppBundle\Entity\Book">
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<constraint name="Symfony\Component\Validator\Constraints\Traverse"/>
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</class>
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</constraint-mapping>
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.. code-block:: php
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// src/AppBundle/Entity/Book.php
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namespace AppBundle\Entity;
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use Symfony\Component\Validator\Constraints as Assert;
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use Symfony\Component\Validator\Mapping\ClassMetadata;
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class Book
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{
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public static function loadValidatorMetadata(ClassMetadata $metadata)
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{
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$metadata->addConstraint(new Assert\Traverse());
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}
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}
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Options
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-------
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.. include:: /reference/constraints/_payload-option.rst.inc

‎setup/flex.rst

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#. Move the source of the assets (e.g. the SCSS files) to ``assets/`` and use
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:doc:`Webpack Encore </frontend>` to manage and compile them.
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#. ``SYMFONY_DEBUG`` and ``SYMFONY_ENV`` environment variables were replaced by
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``APP_DEBUG`` and ``APP_ENV``. Copy their values to the new vars and then remove
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the former ones.
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#. Create the new ``public/index.php`` front controller
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`copying Symfony's index.php source`_ and, if you made any customization in
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your ``web/app.php`` and ``web/app_dev.php`` files, copy those changes into
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#. Remove ``src/AppBundle/``.
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#. Move the original source code from ``src/{App,...}Bundle/`` to ``src/`` and
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update the namespaces of every PHP file to be ``App\...`` (advanced IDEs can do
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this automatically).
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#. Remove the ``bin/symfony_requirements`` script and if you need a replacement
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for it, use the new `Symfony Requirements Checker`_.
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‎templating/formats.rst

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special ``_format`` placeholder in your route definition::
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/**
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* @Route("/{slug}.{_format}", defaults={"_format"="html"})
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* @Route("/{slug}.{_format}", defaults={"_format"="html"}, requirements={"_format"="html|xml"}))
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*/
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public function show(Request $request, $slug)
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{

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