Php symfony 2.1日期不'；t在使用->；修改方法

我对Symfony 2.1和将日期持久化到数据库有问题。我使用PHP5.3。我的代码如下：

public function moveAction()
    {
        $request = $this->getRequest();

        $id = $request->get('id');
        $daydelta = $request->get('daydelta');
        $minutedelta = $request->get('minutedelta');

        $em = $this->getDoctrine()->getManager();

        $entity = $em->getRepository('MedSystemTimetableBundle:Appointment')->find($id);

        if (!$entity) {
            throw $this->createNotFoundException('Unable to find Appointment entity.');
        }

            if (0 != $daydelta) {

            $day = ($daydelta > 0) ? '+'.$daydelta : $daydelta;
            $day .= (abs($daydelta) == 1) ? ' day' : ' days';

            $modifyFrom = $entity->getTimeFrom()->modify($day);
            $modifyTo = $entity->getTimeTo()->modify($day);

            $entity->setTimeFrom($modifyFrom);
            $entity->setTimeTo($modifyTo);
        }
        if (0 != $minutedelta) {

            $month = ($minutedelta > 0) ? '+'.$minutedelta : $minutedelta;
            $month .= (abs($minutedelta) == 1) ? ' minute' : ' minutes';

            $modifyFrom = $entity->getTimeFrom()->modify($month);
            $modifyTo = $entity->getTimeTo()->modify($month);        

            $entity->setTimeFrom($modifyFrom);
            $entity->setTimeTo($test);
        }

        $em->flush();

        return new Response('ok', 200);
    }

---

我已经转储了新的times值，它正确地更改了，但由于某些原因，它没有保存到数据库中。但是如果我将该值设置为new\DateTime，它就可以正常工作。对这种奇怪的行为有什么想法吗？

我检查了你的代码。而你却错过了机会。只需在

flush（）之前添加

希望这会有所帮助。
我找到了解决办法。因为我一直在做参考书，所以条令没有看到变化。答案是克隆对象，然后修改它。下面是正确的代码：

public function moveAction()
{
    $request = $this->getRequest();

    $id = $request->get('id');
    $daydelta = $request->get('daydelta');
    $minutedelta = $request->get('minutedelta');

    $em = $this->getDoctrine()->getManager();

    $entity = $em->getRepository('MedSystemTimetableBundle:Appointment')->find($id);

    if (!$entity) {
        throw $this->createNotFoundException('Unable to find Appointment entity.');
    }

        if (0 != $daydelta) {

        $day = ($daydelta > 0) ? '+'.$daydelta : $daydelta;
        $day .= (abs($daydelta) == 1) ? ' day' : ' days';

        $modifyFrom = clone $entity->getTimeFrom();
        $modifyTo = clone $entity->getTimeTo();

        $entity->setTimeFrom($modifyFrom->modify($day));
        $entity->setTimeTo($modifyTo->modify($day));
    }
    if (0 != $minutedelta) {

        $month = ($minutedelta > 0) ? '+'.$minutedelta : $minutedelta;
        $month .= (abs($minutedelta) == 1) ? ' minute' : ' minutes';

        $modifyFrom = clone $entity->getTimeFrom();
        $modifyTo = clone $entity->getTimeTo();        

        $entity->setTimeFrom($modifyFrom->modify($month));
        $entity->setTimeTo($test)->modify($month);
    }

    $em->flush();

    return new Response('ok', 200);
}

为什么不使用
gedmo
timestable
条令扩展？它会随着事件监听器的持久化而自动运行。我不想保存当前日期，而是从日历中保存非常具体的日期。Timestable在这种情况下不适用。更新条目时不需要持久化。仅在创建新条目时才需要。
public function moveAction()
{
    $request = $this->getRequest();

    $id = $request->get('id');
    $daydelta = $request->get('daydelta');
    $minutedelta = $request->get('minutedelta');

    $em = $this->getDoctrine()->getManager();

    $entity = $em->getRepository('MedSystemTimetableBundle:Appointment')->find($id);

    if (!$entity) {
        throw $this->createNotFoundException('Unable to find Appointment entity.');
    }

        if (0 != $daydelta) {

        $day = ($daydelta > 0) ? '+'.$daydelta : $daydelta;
        $day .= (abs($daydelta) == 1) ? ' day' : ' days';

        $modifyFrom = clone $entity->getTimeFrom();
        $modifyTo = clone $entity->getTimeTo();

        $entity->setTimeFrom($modifyFrom->modify($day));
        $entity->setTimeTo($modifyTo->modify($day));
    }
    if (0 != $minutedelta) {

        $month = ($minutedelta > 0) ? '+'.$minutedelta : $minutedelta;
        $month .= (abs($minutedelta) == 1) ? ' minute' : ' minutes';

        $modifyFrom = clone $entity->getTimeFrom();
        $modifyTo = clone $entity->getTimeTo();        

        $entity->setTimeFrom($modifyFrom->modify($month));
        $entity->setTimeTo($test)->modify($month);
    }

    $em->flush();

    return new Response('ok', 200);
}