如何在Symfony2中执行类似的数据库查询

这应该很简单，但我找不到一个有效的例子。这里有一个控制器方法抛出错误“无效参数编号：绑定变量的数量与令牌的数量不匹配”。我已成功发布“searchterm”变量，但无法使查询正常工作。少了什么？谢谢

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

    $searchterm = $request->get('searchterm');

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

    $query = $em->createQuery("SELECT n FROM AcmeNodeBundle:Node n WHERE n.title LIKE '% :searchterm %'")
             ->setParameter('searchterm', $searchterm);

    $entities = $query->getResult();

    return array('entities' => $entities);

}

---

可能是

AcmeNodeBundle\Node

？在DQL

AcmeNodeBundle:Node

:Node

-命名参数中，应转储创建的查询，以便于调试

我只能建议您也尝试querybuilder：

$qb = $em->createQueryBuilder();
$result = $qb->select('n')->from('Acme\NodeBundle\Entity\Node', 'n')
  ->where( $qb->expr()->like('n.title', $qb->expr()->literal('%' . $searchterm . '%')) )
  ->getQuery()
  ->getResult();

---

我的Symfony2项目的工作示例：

$qb = $this->createQueryBuilder('u');
$qb->where(
         $qb->expr()->like('u.username', ':user')
     )
     ->setParameter('user','%Andre%')
     ->getQuery()
     ->getResult();

---

其中n.title类似“%:searchterm%”

应该是

其中n.title类似：searchterm

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

    $searchterm = $request->get('searchterm');

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

    $query = $em->createQuery("SELECT n FROM AcmeNodeBundle:Node n WHERE n.title LIKE :searchterm")->setParameter('searchterm', $searchterm);

    $entities = $query->getResult();

    return array('entities' => $entities);

}

---

我认为这一选择也有助于：

$qb = $this->createQueryBuilder('u');
$qb->where('u.username like :user')
     ->setParameter('user','%hereIsYourName%')
     ->getQuery()
     ->getResult();