Artist.php

<?php
/*                                                                      		  	*
 * This script belongs to the TYPO3 Flow package "BLEICKER.ArtManager.Structure".	*
 *                                                                        			*
 *                                                                        			*/

namespace BLEICKER\ArtManager\Structure\Domain\Model;

use TYPO3\Flow\Annotations as Flow;
use Doctrine\ORM\Mapping as ORM;

/**
 * @Flow\Entity
 */
class Artist {

	/**
	 * @var string
	 * @ORM\Id
	 * @ORM\Column(length=40)
	 */
	protected $id;

	/**
	 * @var string
	 * @ORM\Id
	 * @ORM\Column(length=40)
	 */
	protected $workspace;

	/**
	 * @param string $id
	 * @param string $workspace
	 */
	public function __construct($id, $workspace) {
		$this->id = $id;
		$this->workspace = $workspace;
	}

	/**
	 * @return string
	 */
	public function getId() {
		return $this->id;
	}

	/**
	 * @return string
	 */
	public function getWorkspace() {
		return $this->workspace;
	}

}

Artwork.php

<?php
/*                                                                      		  	*
 * This script belongs to the TYPO3 Flow package "BLEICKER.ArtManager.Structure".	*
 *                                                                        			*
 *                                                                        			*/

namespace BLEICKER\ArtManager\Structure\Domain\Model;

use TYPO3\Flow\Annotations as Flow;
use Doctrine\ORM\Mapping as ORM;

/**
 * @Flow\Entity
 */
class Artwork {

	/**
	 * @var string
	 * @ORM\Id
	 * @ORM\Column(length=40)
	 */
	protected $id;

	/**
	 * @var string
	 * @ORM\Id
	 * @ORM\Column(length=40)
	 */
	protected $workspace;

	/**
	 * @var Artist
	 * @ORM\ManyToOne
	 * @ORM\JoinColumns({
	 *      @ORM\JoinColumn(name="ArtistId", referencedColumnName="id"),
	 *      @ORM\JoinColumn(name="WorkspaceId", referencedColumnName="workspace")
	 * })
	 */
	protected $artist;


	/**
	 * @param string $id
	 * @param string $workspace
	 */
	public function __construct($id, $workspace, Artist $artist) {
		$this->id = $id;
		$this->workspace = $workspace;
		$this->artist = $artist;
	}

	/**
	 * @return string
	 */
	public function getId() {
		return $this->id;
	}

	/**
	 * @return string
	 */
	public function getWorkspace() {
		return $this->workspace;
	}

	/**
	 * @return Artist
	 */
	public function getArtist() {
		return $this->artist;
	}






}

?>

TestCommandController.php

<?php
namespace BLEICKER\ArtManager\Structure\Command;

/*                                                                        *
 * This script belongs to the TYPO3 Flow package "BLEICKER.ArtManager.Structure".*
 *                                                                        *
 *                                                                        */

use BLEICKER\ArtManager\Structure\Domain\Model\Artwork;
use BLEICKER\ArtManager\Structure\Domain\Model\Artist;
use TYPO3\Flow\Annotations as Flow;
use TYPO3\Flow\Persistence\PersistenceManagerInterface;

/**
 * @Flow\Scope("singleton")
 */
class TestCommandController extends \TYPO3\Flow\Cli\CommandController {

	/**
	 * @var PersistenceManagerInterface
	 * @Flow\Inject
	 */
	protected $persistenceManager;

	/**
	 * @return void
	 */
	public function createCommand() {

		$artist = new Artist('foo', 'Acme.Foo');
		$this->persistenceManager->add($artist);

		$artwork = new Artwork('bar', 'Acme.Foo', $artist);
		$this->persistenceManager->add($artwork);

		$this->persistenceManager->persistAll();

	}

	/**
	 * @return void
	 */
	public function fetchCommand() {

		$clientEntity = $this->persistenceManager->getObjectByIdentifier(array('id' => 'foo', 'workspace' => 'Acme.Foo'), 'BLEICKER\ArtManager\Structure\Domain\Model\Artist');
		\TYPO3\Flow\var_dump($clientEntity, __CLASS__ . '#' . __LINE__, FALSE, TRUE);

		$artwork = $this->persistenceManager->getObjectByIdentifier(array('id' => 'bar', 'workspace' => 'Acme.Foo'), 'BLEICKER\ArtManager\Structure\Domain\Model\Artwork');
		\TYPO3\Flow\var_dump($artwork, __CLASS__ . '#' . __LINE__, FALSE, TRUE);

	}
}