How to update your project?

This document explains how to upgrade from one Symfony2 PR version to the next one. It only discusses changes that need to be done when using the "public" API of the framework. If you "hack" the core, you should probably follow the timeline closely anyway.

beta1 to beta2

The annotation parsing process has been changed (it now uses Doctrine Common 3.0). All annotations which are used in a class must now be imported (just like you import PHP namespaces with the "use" statement):

Before:

/**
- @orm:Entity / class MyUser { /*
  - @orm:Id
  - @orm:GeneratedValue(strategy = "AUTO")
  - @orm:Column(type="integer")
  - @var integer */ private $id;
  /**
  - @orm:Column(type="string", nullable=false)
  - @assert:NotBlank
  - @var string */ private $name; }
After:

use Doctrine\ORM\Mapping as ORM; use Symfony\Component\Validator\Constraints as Assert;

/**
- @ORM\Entity / class MyUser { /*
  - @ORM\Id
  - @ORM\GeneratedValue(strategy="AUTO")
  - @ORM\Column(type="integer")
  - @var integer */ private $id;
  /**
  - @ORM\Column(type="string", nullable=false)
  - @Assert\NotBlank
  - @var string */ private $name; }
The config under "framework.validation.annotations" has been removed and was replaced with a boolean flag "framework.validation.enable_annotations" which defaults to false.
The Set constraint has been removed as it is not required anymore.

Before:

/**
- @assert:Set({@assert:Callback(...), @assert:Callback(...)}) */ private $foo;
After:

use Symfony\Component\Validator\Constraints\Callback;

/**
- @Callback(...)
- @Callback(...) */ private $foo;
Forms must now be explicitly enabled (automatically done in Symfony SE):
```
  form: ~

  # equivalent to
  form:
      enabled: true
```

The Routing Exceptions have been moved:

Before:

  Symfony\Component\Routing\Matcher\Exception\Exception
  Symfony\Component\Routing\Matcher\Exception\NotFoundException
  Symfony\Component\Routing\Matcher\Exception\MethodNotAllowedException

After:

  Symfony\Component\Routing\Exception\Exception
  Symfony\Component\Routing\Exception\NotFoundException
  Symfony\Component\Routing\Exception\MethodNotAllowedException

The form component's csrf_page_id option has been renamed to intention.
The error_handler setting has been removed. The ErrorHandler class is now managed directly by Symfony SE in AppKernel.
The Doctrine metadata files has moved from Resources/config/doctrine/metadata/orm/ to Resources/config/doctrine, the extension from .dcm.yml to .orm.yml, and the file name has been changed to the short class name.

Before:
```
  Resources/config/doctrine/metadata/orm/Bundle.Entity.dcm.xml
  Resources/config/doctrine/metadata/orm/Bundle.Entity.dcm.yml
```
After:
```
  Resources/config/doctrine/Entity.orm.xml
  Resources/config/doctrine/Entity.orm.yml
```

With the introduction of a new Doctrine Registry class, the following parameters have been removed (replaced by methods on the doctrine service):

doctrine.orm.entity_managers
doctrine.orm.default_entity_manager
doctrine.dbal.default_connection

Before:

  $container->getParameter('doctrine.orm.entity_managers')
  $container->getParameter('doctrine.orm.default_entity_manager')
  $container->getParameter('doctrine.orm.default_connection')

After:

  $container->get('doctrine')->getEntityManagerNames()
  $container->get('doctrine')->getDefaultEntityManagerName()
  $container->get('doctrine')->getDefaultConnectionName()

But you don't really need to use these methods anymore, as to get an entity manager, you can now use the registry directly:

Before:

  $em = $this->get('doctrine.orm.entity_manager');
  $em = $this->get('doctrine.orm.foobar_entity_manager');

After:

  $em = $this->get('doctrine')->getEntityManager();
  $em = $this->get('doctrine')->getEntityManager('foobar');

The doctrine:generate:entities arguments and options changed. Run ./app/console doctrine:generate:entities --help for more information about the new syntax.
The doctrine:generate:repositories command has been removed. The functionality has been moved to the doctrine:generate:entities.

Doctrine event subscribers now use a unique "doctrine.event_subscriber" tag. Doctrine event listeners also use a unique "doctrine.event_listener" tag. To specify a connection, use the optional "connection" attribute.

Before:

  listener:
      class: MyEventListener
      tags:
          - { name: doctrine.common.event_listener, event: name }
          - { name: doctrine.dbal.default_event_listener, event: name }
  subscriber:
      class: MyEventSubscriber
      tags:
          - { name: doctrine.common.event_subscriber }
          - { name: doctrine.dbal.default_event_subscriber }

After:

  listener:
      class: MyEventListener
      tags:
          - { name: doctrine.event_listener, event: name }                      # register for all connections
          - { name: doctrine.event_listener, event: name, connection: default } # only for the default connection
  subscriber:
      class: MyEventSubscriber
      tags:
          - { name: doctrine.event_subscriber }                      # register for all connections
          - { name: doctrine.event_subscriber, connection: default } # only for the default connection

Application translations are now stored in the Resources directory:

Before:

app/translations/catalogue.fr.xml

After:

app/Resources/translations/catalogue.fr.xml

The option "modifiable" of the "collection" form type was split into two options "allow_add" and "allow_delete".

Before:

$builder->add('tags', 'collection', array(
    'type' => 'text',
    'modifiable' => true,
));

After:

$builder->add('tags', 'collection', array(
    'type' => 'text',
    'allow_add' => true,
    'allow_delete' => true,
));

Request::hasSession() has been renamed to Request::hasPreviousSession(). The method hasSession() still exists, but only checks if the request contains a session object, not if the session was started in a previous request.
Serializer: The NormalizerInterface's supports() method has been split in two methods: supportsNormalization and supportsDenormalization.
ParameterBag::getDeep() has been removed, and is replaced with a boolean flag on the ParameterBag::get() method.
Serializer: AbstractEncoder & AbstractNormalizer were renamed to SerializerAwareEncoder & SerializerAwareNormalizer.
Serializer: The $properties argument has been dropped from all interfaces.
Form: Renamed option value "text" of "widget" option of the "date" type was renamed to "single-text". "text" indicates to use separate text boxes now (like for the "time" type).
Form: Renamed view variable "name" to "full_name". The variable "name" now contains the local, short name (equivalent to $form->getName()).

PR12 to beta1

The CSRF secret configuration has been moved to a mandatory global secret setting (as the secret is now used for everything and not just CSRF):

Before:
```
  framework:
      csrf_protection:
          secret: S3cr3t
```
After:
```
  framework:
      secret: S3cr3t
```
The File::getWebPath() and File::rename() methods have been removed, as well as the framework.document_root configuration setting.
The File::getDefaultExtension() method has been renamed to File::guessExtension(). The renamed method now returns null if it cannot guess the extension.
The session configuration has been refactored:
- The class option has been removed (use the session.class parameter instead);
- The PDO session storage configuration has been removed (a cookbook recipe is in the work);
- The storage_id option now takes a service id instead of just part of it.
The DoctrineMigrationsBundle and DoctrineFixturesBundle bundles have been moved to their own repositories.
The form framework has been refactored extensively (more information in the documentation).
The trans tag does not accept a message as an argument anymore:

{% trans "foo" %} {% trans foo %}

Use the long version the tags or the filter instead:

{% trans %}foo{% endtrans %} {{ foo|trans }}

This has been done to clarify the usage of the tag and filter and also to make it clearer when the automatic output escaping rules are applied (see the doc for more information).

Some methods in the DependencyInjection component's ContainerBuilder and Definition classes have been renamed to be more specific and consistent:

Before:

  $container->remove('my_definition');
  $definition->setArgument(0, 'foo');

After:

  $container->removeDefinition('my_definition');
  $definition->replaceArgument(0, 'foo');

In the rememberme configuration, the token_provider key now expects a real service id instead of only a suffix.

PR11 to PR12

HttpFoundation\Cookie::getExpire() was renamed to getExpiresTime()

XML configurations have been normalized. All tags with only one attribute have been converted to tag content:

Before:

  <bundle name="MyBundle" />
  <app:engine id="twig" />
  <twig:extension id="twig.extension.debug" />

After:

  <bundle>MyBundle</bundle>
  <app:engine>twig</app:engine>
  <twig:extension>twig.extension.debug</twig:extension>

Fixes a critical security issue which allowed all users to switch to arbitrary accounts when the SwitchUserListener was activated. Configurations which do not use the SwitchUserListener are not affected.
The Dependency Injection Container now strongly validates the references of all your services at the end of its compilation process. If you have invalid references this will result in a compile-time exception instead of a run-time exception (the previous behavior).

PR10 to PR11

Extension configuration classes should now implement the Symfony\Component\Config\Definition\ConfigurationInterface interface. Note that the BC is kept but implementing this interface in your extensions will allow for further developments.
The "fingerscrossed" Monolog option has been renamed to "fingers_crossed".

PR9 to PR10

Bundle logical names earned back their Bundle suffix:

Controllers: Blog:Post:show -> BlogBundle:Post:show

Templates: Blog:Post:show.html.twig -> BlogBundle:Post:show.html.twig

Resources: @Blog/Resources/config/blog.xml -> @BlogBundle/Resources/config/blog.xml

Doctrine: $em->find('Blog:Post', $id) -> $em->find('BlogBundle:Post', $id)
ZendBundle has been replaced by MonologBundle. Have a look at the changes made to Symfony SE to see how to upgrade your projects: https://github.com/symfony/symfony-standard/pull/30/files
Almost all core bundles parameters have been removed. You should use the settings exposed by the bundle extension configuration instead.
Some core bundles service names changed for better consistency.
Namespace for validators has changed from validation to assert (it was announced for PR9 but it was not the case then):

Before:
```
  @validation:NotNull
```
After:
```
  @assert:NotNull
```
Moreover, the Assert prefix used for some constraints has been removed (AssertTrue to True).
ApplicationTester::getDisplay() and CommandTester::getDisplay() method now return the command exit code

PR8 to PR9

Symfony\Bundle\FrameworkBundle\Util\Filesystem has been moved to Symfony\Component\HttpKernel\Util\Filesystem
The Execute constraint has been renamed to Callback

The HTTP exceptions classes signatures have changed:

Before:

  throw new NotFoundHttpException('Not Found', $message, 0, $e);

After:

  throw new NotFoundHttpException($message, $e);

The RequestMatcher class does not add ^ and $ anymore to regexp.

You need to update your security configuration accordingly for instance:

Before:
```
  pattern:  /_profiler.*
  pattern:  /login
```
After:
```
  pattern:  ^/_profiler
  pattern:  ^/login$
```

Global templates under app/ moved to a new location (old directory did not work anyway):

Before:

  app/views/base.html.twig
  app/views/AcmeDemoBundle/base.html.twig

After:

  app/Resources/views/base.html.twig
  app/Resources/AcmeDemo/views/base.html.twig

Bundle logical names lose their Bundle suffix:

Controllers: BlogBundle:Post:show -> Blog:Post:show

Templates: BlogBundle:Post:show.html.twig -> Blog:Post:show.html.twig

Resources: @BlogBundle/Resources/config/blog.xml -> @Blog/Resources/config/blog.xml

Doctrine: $em->find('BlogBundle:Post', $id) -> $em->find('Blog:Post', $id)
Assetic filters must be now explicitly loaded:

assetic: filters: cssrewrite: ~ yui_css: jar: "/path/to/yuicompressor.jar" my_filter: resource: "%kernel.root_dir%/config/my_filter.xml" foo: bar

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How to update your project?

beta1 to beta2

PR12 to beta1

PR11 to PR12

PR10 to PR11

PR9 to PR10

PR8 to PR9