New in Symfony 6.1: Misc. Improvements

Symfony 6.1 has just been released. During the past weeks we’ve published lots
of articles about the most important Symfony 6.1 features. In this article,
the last one in the Symfony 6.1 series, we showcase some minor but interesting
features introduced by Symfony 6.1.

Configure the Deprecation Messages to Ignore

Contributed by

in #45226.

If your application has some deprecations that you can’t fix yet for some reasons,
you can tell Symfony to ignore them. First, create a text file where each line is
a deprecation to ignore defined as a regular expression:

# tests/baseline-ignore.txt
%The „PHPUnit\Framework\TestCase::addWarning()“ method is considered internal%

Then, you can run the following command to use that file and ignore those deprecations:

$ SYMFONY_DEPRECATIONS_HELPER=‚ignoreFile=./tests/baseline-ignore.txt‘ ./vendor/bin/simple-phpunit

Allow to Exclude Services from Tagged Iterators and Locators

Contributed by
Ruud Kamphuis

in #44774.

When working with the Delegation pattern or the Chain-of-responsibility pattern
it’s common that the service that gets a list of services implementing a certain
interface, to also implement that interface itself.

For example, in Symfony, the ChainCacheClearer class implements
CacheClearerInterface and calls a list of services implementing CacheClearerInterface.
In those cases you cannot use autowiring because the main service would receive
it itself in the list of services implementing the interface.

In Symfony 6.1 we’ve improved TaggedIterator and TaggedLocator to allow
you exclude some services via the new exclude option:

final class DelegatingErrorTracker implements ErrorTracker
public function __construct(
#[TaggedIterator(ErrorTracker::class, exclude: self::class)]
private iterable $trackers

public function trackError(string $error): void
// …

Use Route Parameters in Route Conditions

Contributed by

in #46042.

Symfony provides a powerful feature to define route conditions as expressions.
In Symfony 6.1 we’ve improved it so you can use the matched route parameters in
the expression that is evaluated to decide if the route matches or not.

Use the new params variable and pass the name of the route parameter that
you want to get:

class FooController
#[Route(‚/foo/{id}‘, requirements: [‚id‘ => ‚d+‘], condition: „params[‚id‘] < 100“)]
public function index(int $id): Response
// …

Support Canners in Object Normalizer

Contributed by
Rokas Mikalk─Śnas

in #45282.

Currently, the Serializer component can normalize properties with methods that
start with get, set, has, is, add or remove (e.g.
getUser(), isPublished(), addCategory(), etc.)

In Symfony 6.1, the Serializer will also be able to normalize „canner methods“,
which are those that start with the can prefix (e.g. canPublish(),
canApprove(), etc.)

Detailed Checks for Collection Items Uniqueness

Contributed by
Wojciech Kania

in #42403.

When combining the Unique constraint with the Collection constraint, all
the properties of the collection elements are checked to be unique. In Symfony 6.1
we’ve improved the Unique constraint to allow defining which collection
fields should be checked for uniqueness.

The following example validates that each translation of the same resource must
be in a different language:

use SymfonyComponentValidatorConstraints as Assert;

#[AssertCount(min: 1)]
#[AssertUnique(fields: [‚language‘])]
#[AssertCollection(fields: [
‚language‘ => [
new AssertNotBlank,
new AssertLength(min: 2, max: 2),
new AssertLanguage,
‚title‘ => [
new AssertNotBlank,
new AssertLength(max; 255),
‚description‘ => [
new AssertNotBlank,
new AssertLength(max: 255),
public array $translations = [];

A Command to Invalidate Cache Tags

Contributed by
Kevin Bond

in #44692.

Using cache tags is a way to group different cache items based on arbitrary
criteria so you can later invalidate those items more efficiently. In Symfony 6.1
we’ve added a new cache:pool:invalidate-tags command so you can invalidate
those cache tags directly in the command line:

# invalidate `tag1` and `tag2` from all pools
$ php bin/console cache:pool:invalidate-tags tag1 tag2

# invalidate `tag1` and `tag2` only from a specific pool
$ php bin/console cache:pool:invalidate-tags tag1 tag2 –

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