Snippet for post Install nelmio/alice di Framework Symfony

AppFixtures.php

<?php
// src/AppBundle/DataFixtures/ORM/AppFixtures.php

namespace AppBundle\DataFixtures\ORM;

use Doctrine\Bundle\FixturesBundle\Fixture;
use Doctrine\Common\Persistence\ObjectManager;
use Nelmio\Alice\Loader\SimpleFileLoader;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * @property ContainerInterface container
 */
class AppFixtures extends Fixture
{
    public function load(ObjectManager $manager)
    {
        /** @var string $fixtureDir */
        $fixtureDir = __DIR__ . '/fixtures/';
        // fixture files
        $files = [
            'user' => [],
            'admin' => ['require'=>'user'],
            'operator' => ['require'=>'user'],
        ];

        // fix setup
        foreach ($files as $fileName => $config) {
            $config += [
                'require'=>[],
                'required' => false,
                'items' => [],
                'parameters' => [],
            ];
            $files[$fileName] += $config;
            if ($config['require']) {
                $requirements = (array) $config['require'];
                foreach ($requirements as $requirement) {
                    $files[$requirement]['required'] = true;
                }
            }
        }

        /** @var SimpleFileLoader $loader */
        $loader = $this->container->get('nelmio_alice.file_loader');

        // loading objects
        foreach ($files as $fileName => $config) {
            $file = $fixtureDir . $fileName . '.yml';
            $parameters = $config['require'] ? $files[$config['require']]['parameters'] : [];
            $parents = $config['require'] ? $files[$config['require']]['items'] : [];

            $items = $loader
                ->loadFile($file, $parameters, $parents)
                ->getObjects();
            foreach ($items as $item) {
                $manager->persist($item);
            }
            if ($config['required']) {
                $files[$fileName]['items'] = array_merge(
                    $files[$fileName]['items'],
                    $items
                );
            }
        }
        unset($items, $item, $files);

        $manager->flush();
    }

}