Implicit param converter seems to not work anymore 4.2.2

[fabienlem]

Symfony version(s) affected: 4.2.2

Hello!

Description
I'm in pain to make the well known implicit ParamConverter trick work with Symfony 4.2.2:

/**
 * @Route("/{id}", name="admin_post_show")
 */
public function show(Post $post)

It tells that the Post argument cannot be autowired.

How to reproduce
Just follow the exemple given in the best practices guide.

Possible Solution
No idea, sorry!

Additional context
Could relate to #29819 (not sure as the ticket is closed).

Thank you for your feedback!

[xabbuh]

Can you confirm that updating the DependencyInjection component to 4.2.3@dev solves the issue?

[fabienlem]

OK, I will try as soon as possible and keep you updated. Thank you!

[soullivaneuh]

@xabbuh I have a similar issue making entity creation impossible with API platform custom controllers.

Using the 4.2 dev branch seems to fix it indeed.

[xabbuh]

Let's close here then as the issue seems to be fixed by #29853.

[fabienlem]

Hello @xabbuh,

I found the solution by installing a vanilla Symfony 4.2 and comparing composer.json file with the one of my project. I saw that sensio/framework-extra-bundle was missing.

I don't remember how the project was initialised, so I don't know why this vendor was missing.

Thank you again for your help.

Regards!