UPGRADE FROM 4.0 to 4.1

Config

Implementing ParentNodeDefinitionInterface without the getChildNodeDefinitions() method is deprecated.

Console

Deprecated the setCrossingChar() method in favor of the setDefaultCrossingChar() method in TableStyle.

DependencyInjection

Deprecated the TypedReference::canBeAutoregistered() and TypedReference::getRequiringClass() methods.

EventDispatcher

The TraceableEventDispatcherInterface has been deprecated.

FrameworkBundle

Deprecated bundle:controller:action and service:action syntaxes to reference controllers. Use serviceOrFqcn::method instead where serviceOrFqcn is either the service ID when using controllers as services or the FQCN of the controller.

Before:

bundle_controller:
    path: /
    defaults:
        _controller: FrameworkBundle:Redirect:redirect

service_controller:
    path: /
    defaults:
        _controller: app.my_controller:myAction

After:

bundle_controller:
    path: /
    defaults:
        _controller: Symfony\Bundle\FrameworkBundle\Controller\RedirectController::redirectAction

service_controller:
    path: /
    defaults:
        _controller: app.my_controller::myAction

Deprecated Symfony\Bundle\FrameworkBundle\Controller\ControllerNameParser
Warming up a router in RouterCacheWarmer that does not implement the WarmableInterface is deprecated and will not be supported anymore in 5.0.
The RequestDataCollector class has been deprecated. Use the Symfony\Component\HttpKernel\DataCollector\RequestDataCollector class instead.

HttpFoundation

Passing the file size to the constructor of the UploadedFile class is deprecated.
The getClientSize() method of the UploadedFile class is deprecated. Use getSize() instead.
Deprecated Symfony\Component\HttpFoundation\Request::getSession() when no session has been set. Use Symfony\Component\HttpFoundation\Request::hasSession() instead.

Security

The ContextListener::setLogoutOnUserChange() method is deprecated.
Using the AdvancedUserInterface is now deprecated. To use the existing functionality, create a custom user-checker based on the Symfony\Component\Security\Core\User\UserChecker.
AuthenticationUtils::getLastUsername() now always returns a string.

SecurityBundle

The logout_on_user_change firewall option is deprecated.
The switch_user.stateless firewall option is deprecated, use the stateless option instead.
The SecurityUserValueResolver class is deprecated, use Symfony\Component\Security\Http\Controller\UserValueResolver instead.

Serializer

Decoding XML with XmlEncoder now ignores comment node types by default.

Translation

The FileDumper::setBackup() method is deprecated.
The TranslationWriter::disableBackup() method is deprecated.

TwigBundle

Deprecated relying on the default value (false) of the twig.strict_variables configuration option. You should use %kernel.debug% explicitly instead, which will be the new default in 5.0.

Validator

The Email::__construct() 'strict' property is deprecated. Use 'mode'=>"strict" instead.
Calling EmailValidator::__construct() method with a boolean parameter is deprecated, use EmailValidator("strict") instead.
Deprecated the checkDNS and dnsMessage options of the Url constraint.

Workflow

Deprecated the add method in favor of the addWorkflow method in Workflow\Registry.
Deprecated SupportStrategyInterface in favor of WorkflowSupportStrategyInterface.
Deprecated the class ClassInstanceSupportStrategy in favor of the class InstanceOfSupportStrategy.
Deprecated passing the workflow name as 4th parameter of Event constructor in favor of the workflow itself.

Uh oh!