22.06.2026 | Mathias Grab

How to enable Twig debug in Drupal

development.services.yml

parameters:
  twig.config:
    debug: true
    auto_reload: null
    cache: false

Issue:

You work with Twig templates and need to use the debugger.

Solution:

Code solution:
Enable Twig debug by copying the snippet provided from root/web/sites/default.services.yml into root/web/sites/development.services.yml

See also: Drupal Docs on Twig

Sitebuilding solution:
Navigate to the administrative area via the admin toolbar to Configuration -> Development -> Development settings or via the path /admin/config/development/settings

Enable the checkbox Twig development mode, as well as Twig debug mode and Disable Twig cache.

For further information regarding Drupal and Twig take a look at https://www.drupal.org/docs/develop/theming-drupal/twig-in-drupal/debugging-twig-templates

Info

This should only be used for local development environments but disabled in production.

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13.11.2025 | Peter Majmesku

Autowire services with the Autowire attribute in Drupal

Example.php

<?php

declare(strict_types=1);

namespace Drupal\my_module;

use Drupal\Core\Session\AccountInterface;
use Symfony\Component\DependencyInjection\Attribute\Autowire;

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    private readonly AccountInterface $currentUser,
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  }

  public function getCurrentUser(): AccountInterface {
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  }

}

my_module.services.yml

services:
  my_module.example:
    class: Drupal\my_module\Service\Example
    autowire: true
  Drupal\my_module\Service\Example: '@my_module.example'

php

services

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symfony_mailer.mailer_policy._.yml

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