Attachments to Doctrine Jira Issue DDC-1054 - https://github.com/doctrine/doctrine2/issues/1645

10948_Doctrine LazyLoad.php

<?php
use Doctrine\Common\Collections\ArrayCollection;
/**
 * @Entity
 * @Table(name="Privileges")
 */

class Users_Model_Entity_Privilege extends Viscomp_Doctrine_Entity_Abstract
{
	/**
	 *  @Id  @Column(name="privilegeID", type="integer")
	 *  @GeneratedValue(strategy="AUTO")
	 *
	 */
	protected $privilegeID;

	/**
	 * @Column (name="name", type="string", length="45")
	 *
	 *
	 */
	protected $name;

	/**
     * @ManyToMany (targetEntity="Users_Model_Entity_Role", mappedBy="privilege")
     */
	protected $roles;

	public function __construct() {
		$this->roles = new ArrayCollection();
   }

}

/**
 *
 * @Table(name="Roles")
 * @entity(repositoryClass="Users_Model_RoleRepo")
 */

class Users_Model_Entity_Role extends Viscomp_Doctrine_Entity_Abstract
{
	/**
	 *  @Id  @Column(name="roleID", type="integer")
	 *  @GeneratedValue(strategy="AUTO")
	 *
	 */
	protected $roleID;

	/**
	 * @Column (name="name", type="string", length="45")
	 *
	 *
	 */
	protected $name;

	/**
	 * @Column (name="shortName", type="string", length="45")
	 *
	 *
	 */
	protected $shortName;

	/**
	 * @ManyToMany (targetEntity="Users_Model_Entity_Privilege", inversedBy="roles")
	 * @JoinTable (name="RolePrivileges",
	 *      joinColumns={@JoinColumn(name="roleID", referencedColumnName="roleID")},
	 *      inverseJoinColumns={@JoinColumn(name="privilegeID", referencedColumnName="privilegeID")}
	 *      )
	 */
	protected $privilege;


 	/**
 	 * @ManyToMany (targetEntity="Users_Model_Entity_Role", mappedBy="extends")
  	 */
	protected $extendedBy;

	/**
	 * @ManyToMany (targetEntity="Users_Model_Entity_Role", inversedBy="extendedBy")
	 * @JoinTable (name="RoleRelations",
	 *      joinColumns={@JoinColumn(name="roleID", referencedColumnName="roleID")},
	 *      inverseJoinColumns={@JoinColumn(name="extendsRoleID", referencedColumnName="roleID")}
	 *      )
	 */
	protected $extends;

	public function __construct() {
		$this->extends    = new ArrayCollection();
		$this->extendedBy = new ArrayCollection();
		$this->privilege  = new ArrayCollection();
		$this->users      = new ArrayCollection();
   }
}

Data:
------------------------------------------------------------------------------
Role Relations:

roleRelationID | roleID | extendsRoleID
1              | 3      | 1
2              | 4      | 3
3              | 2      | 1


All the roles have priviliges.


----------------------------------------------------------------------------

$Q1 = $em->createQueryBuilder()
         ->select(array('roles', 'privilege', 'extendedBy', 'extends'))
         ->from('Users_Model_Entity_Role', 'roles')
         ->leftJoin('roles.privilege', 'privilege')
         ->leftJoin('roles.extendedBy', 'extendedBy')
         ->leftJoin('roles.extends', 'extends')
         ->where('roles.roleID = ?1')
         ->setParameter('1', '1')
         ->getQuery()
         ->getResult();
         
//As you can see from the data role with ID 2 extends role with ID 1
// so it is initialized through eager loading.
     
$Q2 = $em->createQueryBuilder()
         ->getRepository('Users_Model_Entity_Role')
         ->findOneBy(array('roleID' => 2));

// invoked with lazy loading
$Q2->getPrivilege();
/**
 * Expected to return all the priviliges
 * instead the result is 'NULL'
 * /