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1 | <?php |
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2 | |||
3 | namespace Kunstmaan\SeoBundle\EventListener; |
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4 | |||
5 | use Doctrine\ORM\EntityManager; |
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6 | use Kunstmaan\AdminBundle\Entity\AbstractEntity; |
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7 | use Kunstmaan\AdminBundle\Event\DeepCloneAndSaveEvent; |
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8 | use Kunstmaan\AdminBundle\Helper\CloneHelper; |
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9 | use Kunstmaan\SeoBundle\Entity\Seo; |
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10 | |||
11 | /** |
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12 | * This event will make sure the seo metadata is copied when a page is cloned |
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13 | */ |
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14 | class CloneListener |
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15 | { |
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16 | /** |
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17 | * @var EntityManager |
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18 | */ |
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19 | private $em; |
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20 | |||
21 | /** |
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22 | * @var CloneHelper |
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23 | */ |
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24 | private $cloneHelper; |
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25 | |||
26 | /** |
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27 | * @param EntityManager $em The entity manager |
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28 | * @param CloneHelper $cloneHelper The clone helper |
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29 | */ |
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30 | public function __construct(EntityManager $em, CloneHelper $cloneHelper) |
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31 | { |
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32 | $this->em = $em; |
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33 | $this->cloneHelper = $cloneHelper; |
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34 | } |
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35 | |||
36 | /** |
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37 | * @param DeepCloneAndSaveEvent $event |
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38 | */ |
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39 | public function postDeepCloneAndSave(DeepCloneAndSaveEvent $event) |
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40 | { |
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41 | $originalEntity = $event->getEntity(); |
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42 | |||
43 | if ($originalEntity instanceof AbstractEntity) { |
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44 | /* @var Seo $seo */ |
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45 | $seo = $this->em->getRepository('KunstmaanSeoBundle:Seo')->findFor($originalEntity); |
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46 | |||
47 | if (!is_null($seo)) { |
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48 | /* @var Seo $clonedSeo */ |
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49 | $clonedSeo = $this->cloneHelper->deepCloneAndSave($seo); |
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50 | $clonedSeo->setRef($event->getClonedEntity()); |
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51 | |||
52 | $this->em->persist($clonedSeo); |
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53 | $this->em->flush($clonedSeo); |
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54 | } |
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55 | } |
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56 | } |
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57 | } |
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58 |
The
EntityManager
might become unusable for example if a transaction is rolled back and it gets closed. Let’s assume that somewhere in your application, or in a third-party library, there is code such as the following:If that code throws an exception and the
EntityManager
is closed. Any other code which depends on the same instance of theEntityManager
during this request will fail.On the other hand, if you instead inject the
ManagerRegistry
, thegetManager()
method guarantees that you will always get a usable manager instance.