Associate a Custom Sonata Admin Class to a Sonata Block Service

ProductBlockService.php

<?php

namespace Application\Sonata\PageBundle\Block\Service;

use Sonata\BlockBundle\Block\BlockContextInterface;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Bundle\FrameworkBundle\Templating\EngineInterface;
use Sonata\AdminBundle\Form\FormMapper;
use Sonata\AdminBundle\Validator\ErrorElement;
use Sonata\BlockBundle\Model\BlockInterface;
use Sonata\BlockBundle\Block\BaseBlockService;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;

/**
 * Class ProductBlockService
 *
 * @package Application\Sonata\PageBundle\Block\Service
 */
class ProductBlockService extends BaseBlockService
{

    protected $productAdmin;

    /**
     * @param string             $name
     * @param EngineInterface    $templating
     * @param ContainerInterface $container
     */
    public function __construct($name, EngineInterface $templating, ContainerInterface $container)
    {
        parent::__construct($name, $templating);

        $this->container =  $container;
        $this->manager   =  $this->container->get('doctrine')->getManager();
    }

    /**
     * {@inheritdoc}
     */
    public function getName()
    {
        return "Product" ;
    }

    /**
     * {@inheritdoc}
     */
    public function execute(BlockContextInterface $blockContext, Response $response = null)
    {
        $settings = $blockContext->getSettings();
        $product = $blockContext->getBlock()->getSetting('productId');

        $parameters = array(
            'context'   => $blockContext,
            'settings'  => $settings,
            'block'     => $blockContext->getBlock(),
            'product'   => $product,
        );

        return $this->renderResponse($blockContext->getTemplate(), $parameters, $response);
    }

    /**
     * {@inheritdoc}
     */
    public function buildEditForm(FormMapper $formMapper, BlockInterface $block)
    {
        $formMapper->add('settings', 'sonata_type_immutable_array', array(
            'keys' => array(
                array('title', 'text', array('required' => true)),
                array($this->getProductBuilder($formMapper), null, array()),
            )));
    }

    /**
     * @param \Sonata\AdminBundle\Form\FormMapper $formMapper
     *
     * @return \Symfony\Component\Form\FormBuilder
     */
    protected function getProductBuilder(FormMapper $formMapper)
    {
        // simulate an association ...
        $fieldDescription = $this->getProductAdmin()->getModelManager()->getNewFieldDescriptionInstance($this->productAdmin->getClass(), 'product');
        $fieldDescription->setAssociationAdmin($this->getProductAdmin());
        $fieldDescription->setAdmin($formMapper->getAdmin());
        //$fieldDescription->setOption('edit', 'list');
        $fieldDescription->setAssociationMapping(array(
            'fieldName' => 'product',
            'type'      => \Doctrine\ORM\Mapping\ClassMetadataInfo::ONE_TO_MANY
        ));

        return $formMapper->create('productId', 'sonata_type_model', array(
            'sonata_field_description' => $fieldDescription,
            'class'                    => $this->getProductAdmin()->getClass(),
            'model_manager'            => $this->getProductAdmin()->getModelManager()
        ));
    }

    /**
     * @return mixed
     */
    public function getProductAdmin()
    {
        if (!$this->productAdmin) {
            $this->productAdmin = $this->container->get('my.admin.product'); // cf. sonata services in .yml files
        }

        return $this->productAdmin;
    }

    /**
     * {@inheritdoc}
     */
    public function validateBlock(ErrorElement $errorElement, BlockInterface $block)
    {
        $errorElement
            ->with('settings.title')
            ->assertNotNull(array())
            ->assertNotBlank()
            ->assertMaxLength(array('limit' => 255))
            ->end();
    }

    /**
     * {@inheritdoc}
     */
    public function setDefaultSettings(OptionsResolverInterface $resolver)
    {

        $resolver->setDefaults(array(
            'title'     => '',
            'product'   => false,
            'productId' => false,
            'template'  => 'ApplicationSonataPageBundle:Block:product.html.twig',
        ));
    }

    /**
     * {@inheritdoc}
     */
    public function prePersist(BlockInterface $block)
    {
        $block->setSetting('productId', is_object($block->getSetting('productId')) ? $block->getSetting('productId')->getId() : null);
    }

    /**
     * {@inheritdoc}
     */
    public function preUpdate(BlockInterface $block)
    {
        $block->setSetting('productId', is_object($block->getSetting('productId')) ? $block->getSetting('productId')->getId() : null);
    }

    /**
     * {@inheritdoc}
     */
    public function load(BlockInterface $block)
    {
        $product = $block->getSetting('productId');

        if ($product) {
            $product = $this->manager->getRepository('My\CustomBundle\Entity\Product')->findOneBy(array('id' => $product));
        }

        $block->setSetting('productId', $product);
    }
}

👍

Big thank you !