ModelWithMultipleId.php

<?php
namespace Flows\IdentityValidation\Domain\Model;

/*                                                                        *
 * This script belongs to the TYPO3 Flow package "Flows.IdentityValidation".*
 *                                                                        *
 *                                                                        */

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

/**
 * A Model with multiple id
 *
 * @Flow\Entity
 */
class ModelWithMultipleId {

  /**
	 * The first id
	 * @var integer
	 * @ORM\Id
	 */
	protected $firstId;

	/**
	 * The second id
	 * @var integer
	 * @ORM\Id
	 */
	protected $secondId;

	/**
	 * The third id
	 * @var integer
	 * @ORM\Id
	 */
	protected $thirdId;

	/**
	 * The var one
	 * @var string
	 * @Flow\Identity
	 * @Flow\Validate(type="NotEmpty")
	 */
	protected $varOne;

	/**
	 * The var two
	 * @var string
	 * @Flow\Identity
	 * @Flow\Validate(type="NotEmpty")
	 */
	protected $varTwo;

	/**
	 * The var three
	 * @var string
	 * @Flow\Identity
	 * @Flow\Validate(type="NotEmpty")
	 */
	protected $varThree;


	/**
	 * Get the Model with multiple id's first id
	 *
	 * @return integer The Model with multiple id's first id
	 */
	public function getFirstId() {
		return $this->firstId;
	}

	/**
	 * Sets this Model with multiple id's first id
	 *
	 * @param integer $firstId The Model with multiple id's first id
	 * @return void
	 */
	public function setFirstId($firstId) {
		$this->firstId = $firstId;
	}

	/**
	 * Get the Model with multiple id's second id
	 *
	 * @return integer The Model with multiple id's second id
	 */
	public function getSecondId() {
		return $this->secondId;
	}

	/**
	 * Sets this Model with multiple id's second id
	 *
	 * @param integer $secondId The Model with multiple id's second id
	 * @return void
	 */
	public function setSecondId($secondId) {
		$this->secondId = $secondId;
	}

	/**
	 * Get the Model with multiple id's third id
	 *
	 * @return integer The Model with multiple id's third id
	 */
	public function getThirdId() {
		return $this->thirdId;
	}

	/**
	 * Sets this Model with multiple id's third id
	 *
	 * @param integer $thirdId The Model with multiple id's third id
	 * @return void
	 */
	public function setThirdId($thirdId) {
		$this->thirdId = $thirdId;
	}

	/**
	 * Get the Model with multiple id's var one
	 *
	 * @return string The Model with multiple id's var one
	 */
	public function getVarOne() {
		return $this->varOne;
	}

	/**
	 * Sets this Model with multiple id's var one
	 *
	 * @param string $varOne The Model with multiple id's var one
	 * @return void
	 */
	public function setVarOne($varOne) {
		$this->varOne = $varOne;
	}

	/**
	 * Get the Model with multiple id's var two
	 *
	 * @return string The Model with multiple id's var two
	 */
	public function getVarTwo() {
		return $this->varTwo;
	}

	/**
	 * Sets this Model with multiple id's var two
	 *
	 * @param string $varTwo The Model with multiple id's var two
	 * @return void
	 */
	public function setVarTwo($varTwo) {
		$this->varTwo = $varTwo;
	}

	/**
	 * Get the Model with multiple id's var three
	 *
	 * @return string The Model with multiple id's var three
	 */
	public function getVarThree() {
		return $this->varThree;
	}

	/**
	 * Sets this Model with multiple id's var three
	 *
	 * @param string $varThree The Model with multiple id's var three
	 * @return void
	 */
	public function setVarThree($varThree) {
		$this->varThree = $varThree;
	}

}
?>

ModelWithMultipleId.sql

CREATE TABLE IF NOT EXISTS `flows_identityvalidation_domain_model_modelwithmultipleid` (
  `firstid` int(11) NOT NULL,
  `secondid` int(11) NOT NULL,
  `thirdid` int(11) NOT NULL,
  `varone` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
  `vartwo` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
  `varthree` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
  PRIMARY KEY (`firstid`,`secondid`,`thirdid`),
  UNIQUE KEY `flow_identity_flows_identityvalidation_domain_model_model_0ce54` (`varone`,`vartwo`,`varthree`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;