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New in Symfony 5.3: UID Improvements

The UID Component was introduced in Symfony 5.1 as an experimental feature to help you generate and work with UIDs (universally unique identifiers) such as UUIDs and ULIDs. In Symfony 5.3 this component is no longer considered experimental and we added some new features to it.

New Ways to Generate UIDs

Contributed by
Thomas Calvet
in #39507 and #39850.

Creating UID values is easy thanks to methods like Uuid::v1(), Uuid::v4(), new Ulid(), etc. In Symfony 5.3 we’ve added new methods so you can create UID objects from several string representations of UIDs:

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$uuid = Uuid::fromBinary("\xd9\xe7\xa1\x84\x5d\x5b\x11\xea\xa6\x2a\x34\x99\x71\x00\x62\xd0");
$uuid = Uuid::fromBase32('6SWYGR8QAV27NACAHMK5RG0RPG');
$uuid = Uuid::fromBase58('TuetYWNHhmuSQ3xPoVLv9M');
$uuid = Uuid::fromRfc4122('d9e7a184-5d5b-11ea-a62a-3499710062d0');

$ulid = Ulid::fromBinary("\x01\x71\x06\x9d\x59\x3d\x97\xd3\x8b\x3e\x23\xd0\x6d\xe5\xb3\x08");
$ulid = Ulid::fromBase32('01E439TP9XJZ9RPFH3T1PYBCR8');
$ulid = Ulid::fromBase58('1BKocMc5BnrVcuq2ti4Eqm');
$ulid = Ulid::fromRfc4122('0171069d-593d-97d3-8b3e-23d06de5b308');

In addition, we’ve added several services such as ulid.factory and uuid.factory (and their corresponding autowiring aliases UlidFactory, UuidFactory, etc.) so you can customize the creation of UIDs. The defaults of the generated UIDs are now configured semantically:

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# config/packages/framework.yaml
framework:
    uid:
        default_uuid_version: 4

Finally, we added UlidGenerator and UuidGenerator classes so you can use them as Doctrine ID generators, to use UIDs as the value of your primary keys in Doctrine entities.

UID Form Types

Contributed by
Gemorroj
in #39863.

The integration with the Form component was one of the last missing features of the UIDs. That’s why in Symfony 5.3 we’ve added the UuidType and UlidType form types so you can work with UID values in your forms.

These form types render a <input type="text"> field with the string representation of the given UID object and transform it back to a UID object when submitting the form.

Serializing UIDs

Contributed by
Thomas Calvet
in #39675.

The Serializer component includes a UidNormalizer to transform objects of type Symfony\Component\Uid\AbstractUid into strings. In Symfony 5.3 we’ve improved it to support different string formats.

You can now pass the UidNormalizer::NORMALIZATION_FORMAT_KEY context option to the serializer and set it to the desired format (e.g. UidNormalizer::NORMALIZATION_FORMAT_RFC_4122, etc.)

Generate and Inspect UIDs in the Console

Contributed by
Thomas Calvet
in #39883.

The UID component now includes some console commands to help you generate and inspect the details of UUID/ULID values.

For example:

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$ php bin/console uuid:generate --random-based
$ php bin/console ulid:generate --count=2 --format=rfc4122

# run them with the `--help` option to check all their options:
$ php bin/console uuid:generate --help
$ php bin/console ulid:generate --help
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$  php bin/console ulid:inspect 01F2TTCSYK1PDRH73Z41BN1C4X
  --------------------- --------------------------------------
   Label                 Value
  --------------------- --------------------------------------
   Canonical (Base 32)   01F2TTCSYK1PDRH73Z41BN1C4X
   Base 58               1BYGm16jS4kX3VYCysKKq6
   RFC 4122              0178b5a6-67d3-0d9b-889c-7f205750b09d
  --------------------- --------------------------------------
   Timestamp             2021-04-09 08:01:24.947
  --------------------- --------------------------------------

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