php – Symfony2和Doctrine：OneToMany关系复制表中的数据

id    |  article_id |     email
1     |      1      |  test@etest.com
2     |      1      |  test2@test.com
3     |      2      |  test@etest.com
4     |      2      |  test3@test.com

等等….

article_id与articles表中的id之间存在关系.

在我的实体中,我有这个代码：

class Articles
{ 
    ....
     /**
      * @ORMOneToMany(targetEntity="AcmeDemoBundleEntityEmails",mappedBy="articles")
      */
      private $emails_rel; 

    ...
}

class Emails
{ 
    /**
     * @ORMManyToOne(targetEntity="AcmeDemoBundleEntityArticles",inversedBy="emails_rel",cascade={"all"})
     * @ORMJoinColumn(name="article_id",referencedColumnName="id")
     **/
    private $articles; 
}

在我的控制器中,我正在做一些测试,我将坚持或不坚持某些实体.
最后,我正在做同花

$em->flush();

而奇怪的行为是,在我的电子邮件表中,一旦我进行刷新,数据就会被复制.使用时测试实体管理器

$em->getUnitOfWork()->getScheduledEntityInsertions()

我得到一个空数组.

知道为什么吗？非常感谢你.

编辑：

这是测试：

$articl = new Articles();
$articl = $em->createQuery("SELECT p FROM AcmeDemoBundleEntityArticles p WHERE p.bMailToMatch = 1")->getResult();
$nb = count($articl);

// BECAUSE I WILL WORK WITH A LOTS OF ENTRIES - PREVENT MEMORY OVERFLOW
$em->clear();    

if(isset( $articl )) {
    foreach($articl as $i => $art) {
        $array_emails = null;

        $art_emails = $art->getEmailsRel();
        foreach ($art_emails as $e) {
            $array_emails[] = $e->getEmail();
        }

        $art_id = $art->getId ();
        echo "nn---------- $i ----------n " . $art->getDoi ();

        // TAKES ARTICLE WITH ZERO EMAIL
        if (!isset($array_emails) ) {
            $updated_article = $em->getRepository('AcmeDemoBundle:Articles')->findOneBy(array( 'id' => ($art_id)    )) ; 
            // Because of the clearing of the entity manager
            echo"nn$art_id Article DOI n".$updated_article->getDoi();
            echo "n==>Put the BMailToMatch's flag to 0";
            $updated_article->setBMailToMatch(0);
            $em->persist($updated_article);
        }
        else {
            echo " ==> okn";
        }

        if (($i % 3) == 0) {
            $em->flush();
            $em->clear();
        }
    }

    $em->flush();
    $em->clear();
}

return new Response ( "nnFinished!!n" );