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I tried to use

# app/config/services.yml services: project.controller.some: class: Project\SomeBundle\Controller\SomeController arguments: ['@templating']

and

namespace Project\SomeBundle\Controller; use Symfony\Bundle\FrameworkBundle\Templating\EngineInterface; use Symfony\Component\HttpFoundation\Response; class SomeController { private $templating; public function __construct(EngineInterface $templating) { $this->templating = $templating; } public function indexAction() { return $this->templating->render( 'SomeBundle::template.html.twig', array( ) ); } }

in Symfony 4 flex. Now I get the error

ServiceNotFoundException The service "project.controller.some" has a dependency on a non-existent service "templating".

Please tell me how to solve this. My composer.json already contains "symfony/templating": "^4.0" but this seems not to be enough.

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3

Symfony 4 doesn't include Twig by default, so you need to install it first:

composer require twig

should do the trick. Also, with service autowiring in Symfony 4 you don't need to manually declare it in the services.yml.

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2

Another solution is to add the configuration under framework as explained in the doc

# app/config/packages/framework.yaml framework: # ... templating: { engines: ['twig'] }
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With Symfony 4 you can also use new DI features (already available since Symfony 3.3):

They will simplify all to:

# app/config/services.yml services: _defaults: autowired: true Project\SomeBundle\Controller\SomeController: ~

If you want to know more with real before/after examples, read How to refactor to new Dependency Injection features in Symfony 3.3

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