Configure FormElementManager about mezzio

[weierophinney]

How do you configure FormElementManager? Do you have a factory that injects it with configuration?

I did something similar here: https://github.com/mtymek/blast-input-filter - I configure validator, filter and input filter plugin managers in a similar manner as you do. Take a look - maybe it will give you some hints.
Alternatively, maybe you would like to contribute to my component and add support for form elements?

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Originally posted by @mtymek at zendframework/zend-expressive#387 (comment)

[weierophinney]

Like I said, I only have a special ConfigProvider which reads the config file and adds it to the configuration in the /config/config.php. i thought that all the configuration is passed to formElementManager and others. To fix this I added the lines I mentioned.

Your package looks like a better solution though I am missing hydrators and form elements. The name of the package seems a bit misleading when adding hydrators and form elements.

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Originally posted by @RalfEggert at zendframework/zend-expressive#387 (comment)

[weierophinney]

So, basically you're missing a factory that does the code you put in config.php ;) By itself, FormElementManager doesn't know that it should look for form_elements config key.

My package doesn't have hydrators and form elements because I don't use them (well, I use hydrators but I keep them in main SM...). But I'll be happy to accept PR or even consider changing the package name to something more relevant afterwards.

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Originally posted by @mtymek at zendframework/zend-expressive#387 (comment)

[weierophinney]

@RalfEggert for this i usually use Delegator Factories like

<?php

namespace My\Namespace\Form;

use Interop\Container\ContainerInterface;
use Zend\Form\FormElementManager\FormElementManagerV3Polyfill;
use Zend\ServiceManager\Config;
use Zend\ServiceManager\Factory\DelegatorFactoryInterface;

class FormElementManagerDelegatorFactory implements DelegatorFactoryInterface
{
    public function __invoke(ContainerInterface $container, $name, callable $callback, array $options = null)
    {
        $formElementManager = $callback();

        $config = $container->has('config') ? $container->get('config') : [];
        $config = isset($config['form_elements']) ? $config['form_elements'] : [];
        (new Config($config))->configureServiceManager($formElementManager);

        return $formElementManager;
    }
}

and in my ConfigProvider config

<?php

return [
    'dependencies' => [
        'delegators' => [
            'HydratorManager' => [
                My\Namespace\Hydrator\HydratorManagerDelegatorFactory::class,
            ],
            'InputFilterManager' => [
                My\Namespace\InputFilter\InputFilterManagerDelegatorFactory::class,
            ],
            'FormElementManager' => [
                My\Namespace\Form\FormElementManagerDelegatorFactory::class,
            ],
        ],
    ],
];

yes, class naming could be improved ;-)

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Originally posted by @skors at zendframework/zend-expressive#387 (comment)