New in Symfony 6.1: Expressions as Service Factories

Contributed by Nicolas Grekas in #45512.

The service container provided by the DependencyInjection component allows you to configure the creation of objects. However, sometimes you need to apply the factory design pattern to delegate the object creation to some special object called "the factory". In Symfony 6.1 we're improving the service container to allow you to use expressions as service factories. This can help you in advanced cases such as selecting the factory based on the value of an environment variable. The syntax to use depends on the configuration format: in YAML: factory: '@=service("foo").bar()' in XML: in PHP: ->factory(expr('service("foo").bar()')) The following example shows how to select the factory to use based on the value of a configuration parameter:

    # config/services.yaml

services: App\Mailer: factory: "@=parameter('some_param') ? service('some_service') : arg(0)" arguments:

  • '@some_other_service'

The arg() function returns the value of arguments passed to the factory (e.g. arg(0) returns the first argument, arg(1) returns the second argument, etc.)

                Sponsor the Symfony project.

https://symfony.com/blog/new-in-symfony-6-1-expressions-as-service-factories?utm_source=Symfony%20Blog%20Feed&utm_medium=feed

Creată 3y | 10 mai 2022, 11:20:07


Autentifică-te pentru a adăuga comentarii

Alte posturi din acest grup

A Week of Symfony #962 (June 2–8, 2025)

This week, development activity focused on the upcoming Symfony 7.4 and 8.0 versions, which will deprecate and remove many features. In addition, we published a case study about Yousign. Finally, we'r

8 iun. 2025, 07:50:05 | Symfony
Case study - Yousign: Scaling Trust with Smart, Scalable Architecture

As digital signatures become the norm in modern business, Yousign has established itself as a trusted leader across Europe. Behind its simple, intuitive interface is a powerful technical engine, handl

6 iun. 2025, 07:10:24 | Symfony
SymfonyOnline June 2025 starts next week!

Get ready for the exciting SymfonyOnline June 2025, kicking off in a few days only! There’s still time to register and join the international online Symfony conference—along with pre-conferenc

5 iun. 2025, 10:20:09 | Symfony
A Week of Symfony #961 (May 26 – June 1, 2025)

This week, Symfony released the stable version of Symfony 7.3, which includes lots of amazing new features. We also published the maintenance versions 6.4.22 and 7.2.7.

Symfony development highlights

1 iun. 2025, 08:50:16 | Symfony
New in Symfony 7.3: DX Improvements (part 2)

This is the second part of the blog post showcasing the main DX (developer experience) features introduced in Symfony 7.3. Read the first part of this blog post.

Verify URI Signatures… https://symfon

29 mai 2025, 09:10:19 | Symfony
Symfony 6.4.22 released

Symfony 6.4.22 has just been released. Read the Symfony upgrade guide to learn more about upgrading Symfony and use the SymfonyInsight upgrade reports to detect the code you will need to change in you

29 mai 2025, 09:10:19 | Symfony
Symfony 7.2.7 released

Symfony 7.2.7 has just been released. Read the Symfony upgrade guide to learn more about upgrading Symfony and use the SymfonyInsight upgrade reports to detect the code you will need to change in your

29 mai 2025, 09:10:18 | Symfony