Symfony3 ClassNotFoundException after bundle creation

Question

I wanted to start a new 3.3 project in Symfony and started as usual:

1.) Creating the new project: symfony new ArtProject

2.) Creating a new Bundle: php app/console generate:bundle (Paul/ArtBundle, yml, src/)

Then I run the local server and when I open 127.0.0.1:8000 I get this beautiful message:

(1/1) ClassNotFoundException

Attempted to load class "PaulArtBundle" from namespace "Paul\ArtBundle". Did you forget a "use" statement for another namespace? in AppKernel.php (line 19)

Which is strange and I haven't figured out why this happen so far. Before creating the Bundle, there was no error; I saw the typical startpage of symfony.

public function registerBundles()
{
    $bundles = [
        new Symfony\Bundle\FrameworkBundle\FrameworkBundle(),
        ......
        new Sensio\Bundle\FrameworkExtraBundle\SensioFrameworkExtraBundle(),
        new AppBundle\AppBundle(),
        new Paul\ArtBundle\PaulArtBundle(),
    ];
}

---

<?php

namespace Paul\ArtBundle;

use Symfony\Component\HttpKernel\Bundle\Bundle;

class PaulArtBundle extends Bundle
{
}

Any idea whats going on there? I did not change a thing, I only ran these commands.

Answer 1

I just installed a fresh copy of S3.3.4 (latest version as of this writing) using:

composer create-project symfony/framework-standard-edition s334 "3.3.4" bin/console generate:bundle Share across multiple apps: yes namespace: Paul\ArtBundle bundle name: PaulArtBundle Target Directory: src/ 

Refreshed the browser and sure enough I got the class not found message.

The generate:bundle command is not updating the autload section of composer.json when a new namespace is introduced. Edit composer.json and:

# composer.json "autoload": {     "psr-4": {         "AppBundle\\": "src/AppBundle",         "Paul\\": "src/Paul"     },     "classmap": [ "app/AppKernel.php", "app/AppCache.php" ] }, 

Then run

composer dumpautoload 

And restart the server(maybe). That should fix the bundle class not found problem.

I have not used the generate:bundle command is quite some time ever since the standard was to put everything under AppBundle so I don't know how long this has been "broken". But at least three questions in the last week or so indicates it was something recent.

And by the way, when I refreshed the browser I got "Hello World" which threw me for a bit. Turns out the new bundle overrides the / route which is also sort of special.

And in case anybody is wondering why this started happening, Symfony 3.2 changed from

#composer.json "psr-4": { "": "src/" }, To "psr-4": { "AppBundle\\": "src/AppBundle" }, 

You could always just change it back though I think spelling out individual namespaces might be "better". Not sure.

And here is an issue with more details: https://github.com/symfony/symfony-standard/issues/1098

Looks like the maintainer favored a tiny speed improvement over breaking an existing command. Oh well. Symfony Flex is supposed to make everything great again.

Answer 2

If you generate a bundle for usage in multiple projects (with own namespace) you need to add it in the composer.json as follwed:

Lets assume your bundle name is CompanyFooBundle with namespace Company\Bundle\FooBundle then the composer autoload section should look like:

... "autoload": {     "psr-4": {         "Company\\Bundle\\FooBundle\\": "src/Company/Bundle/FooBundle"     },     "classmap": [         "app/AppKernel.php",         "app/AppCache.php"     ] }, ...