Symfony 4 Custom config yaml file for Bundle

Question

I'm trying to convert a bundle to symfony 4 and need to update my ancient parameters.yml to the modern symfony 4 way of life. Basicall the bundle itself - shared across multiple apps - should have a configurable file under /config/packages/.

However I receive this error:

(1/1) InvalidArgumentException

There is no extension able to load the configuration for "ptmr" (in /var/www/html/ptmr/pws_ptmrio_dev/PtmrBundle/DependencyInjection/../../config/packages/ptmr.yaml). Looked for namespace "ptmr", found none

/PtmrBundle/DependencyInjection/PtmrExtension.php

<?php
namespace PtmrBundle\DependencyInjection;

use Symfony\Component\Config\FileLocator;
use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
use Symfony\Component\HttpKernel\DependencyInjection\Extension;
use Symfony\Component\DependencyInjection\ContainerBuilder;

class PtmrExtension extends Extension
{

    public function load(array $configs, ContainerBuilder $container)
    {

        $configuration = new Configuration(true);
        $config = $this->processConfiguration($configuration, $configs);

        $loader = new YamlFileLoader(
            $container,
            new FileLocator(__DIR__ . '/../../config/packages')
        );

        $loader->load('ptmr.yaml');

    }


}

/PtmrBundle/DependencyInjection/Configuration.php

<?php
namespace PtmrBundle\DependencyInjection;

use Symfony\Component\Config\Definition\Builder\TreeBuilder;
use Symfony\Component\Config\Definition\ConfigurationInterface;

class Configuration implements ConfigurationInterface
{

    private $debug;

    public function  __construct($debug = true)
    {
        $this->debug = (bool) $debug;
    }

    public function getConfigTreeBuilder()
    {
        $treeBuilder = new TreeBuilder('ptmr');

        $treeBuilder->getRootNode()
            ->children()
            ->arrayNode('twitter')
            ->children()
            ->integerNode('client_id')->end()
            ->scalarNode('client_secret')->end()
            ->end()
            ->end() // twitter
            ->end()
        ;

        return $treeBuilder;
    }
}

/config/packages/ptmr.yaml

ptmr:
  twitter:
    client_id: 123
    client_secret: your_secret

-- Note: The Bundle itself works.

I added this line to psr-4 in composer.json:

    "PtmrBundle\\": "PtmrBundle/"

This lines to config/routes/annotations.yml

ptmr_bundle:
    resource: ../PtmrBundle/Controller/
    type: annotation

These lines to config/services.yaml

services:
    ...

    PtmrBundle\:
        resource: '../PtmrBundle/*'
        exclude: '../PtmrBundle/{DependencyInjection,Entity,Migrations,Tests,Kernel.php}'

    ...

    PtmrBundle\Controller\:
        resource: '../PtmrBundle/Controller'
        tags: ['controller.service_arguments']

And of course PtmrBundle/PtmrBundle.php

<?php

namespace PtmrBundle;

use Symfony\Component\HttpKernel\Bundle\Bundle;

class PtmrBundle extends Bundle
{

}

I'm following these instructions and I reaaaly do not see any errors. What am I missing? Symfony 4.2.

Answer 1

I found the answer after all. To make your own config/bundle.yaml parameters file, simply do:

Step 1: Create a file in your bundle DependencyInjection/{BundleNameWithoutBundle}Extension.php, e.g. for MyBundle > MyExtension.php

<?php
namespace MyBundle\DependencyInjection;

use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\Extension\Extension;

class MyExtension extends \Symfony\Component\DependencyInjection\Extension\Extension
{
    public function load(array $configs, ContainerBuilder $container)
    {
        $configuration = new Configuration();
        $config = $this->processConfiguration($configuration, $configs);

        $container->setParameter('my', $config);
    }
}

Also see How to Load Service Configuration inside a Bundle

Step 2: Make a configuration file that provides a schema for your .yaml file DependencyInjection/Configuration.php

<?php

namespace MyBundle\DependencyInjection;

use Symfony\Component\Config\Definition\Builder\TreeBuilder;
use Symfony\Component\Config\Definition\ConfigurationInterface;

class Configuration implements ConfigurationInterface
{
    public function getConfigTreeBuilder()
    {
        $treeBuilder = new TreeBuilder('my');

        $treeBuilder->getRootNode()
            ->children()
                ->variableNode('project_name')->end()
            ->end()
        ;

        return $treeBuilder;
    }
}

Also see How to Create Friendly Configuration for a Bundle

Step 3: Mirror the Configuration.php in your config/my.yaml

my:
  project_name: "My Name"

Now the parameter my is available (set in MyExtension Class). Simply get it in your Controller like:

class IndexController extends AbstractController
{
    public function indexAction(ParameterBagInterface $parameterBag)
    {
        ...
        dump($parameterBag->get('ptmr'));
        return $this->render('index.html.twig');
    }

}

Note: Most bundles go further and manipulate the bundles config xml files, which is out of scope for a simple question like this. A simple example on how to do this is the KnpPaginatorBundle which is not overly complicated to understand for settings parameters.

Personal Note: It seems to me, the Symfony docs are overly complicated and should provide a simple example. You got to know a lot of nomenclature and it's hard to learn it, especially compared to other well documented symfony chapters.

Answer 2

You are attempting to load configuration for your bundle before Symfony is aware of your bundle. Your bundle class must be loaded and configured before you can parse configuration under the ptmr property.

Typically your bundle would load __DIR__.'/../Resources/config/services.yaml which contains service and parameters definitions. Outside of your bundle, in your application config/ dir, you would then load configuration under the ptmr property.