如何在preUpdate事件侦听器中更改字段的值? [英] How do I change a field's value in preUpdate event listener?
问题描述
已更新的实体的字段的更改不再被刷新操作识别,使用计算的更改集传递给事件以修改原始字段值。
但它也说:
getCntetChangeSet()获取一个更改集数组的副本
对此返回的数组的更改不会影响更新。
这是否意味着我无法更改preUpdate事件侦听器中的实体的字段?如果没有,我将如何完成此更新?
显然,您需要自己重新计算更改集,以进行更改效果:
$ em = $ args-> getEntityManager();
$ uow = $ em-> getUnitOfWork();
$ meta = $ em-> getClassMetadata(get_class($ entity));
$ uow-> recomputeSingleEntityChangeSet($ meta,$ entity);
Documentation says:
Changes to fields of the passed entities are not recognized by the flush operation anymore, use the computed change-set passed to the event to modify primitive field values.
But it also says:
getEntityChangeSet() to get a copy of the changeset array. Changes to this returned array do not affect updating.
Does this mean I can not change fields of an entity in preUpdate event listener? If not, how would I go about accomplishing this update?
Apparently you need to recompute the changeset yourself for the changes to take effect:
$em = $args->getEntityManager();
$uow = $em->getUnitOfWork();
$meta = $em->getClassMetadata(get_class($entity));
$uow->recomputeSingleEntityChangeSet($meta, $entity);
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