Question

我在Doctrine中有2个实体：User和Club。两者都在权利中包含此文本：

 /**
 * @ORM\ManyToMany(targetEntity="User", mappedBy="sms_followers")
 **/
private $smsfollowers;

另一个目标实体是Club。

我使用findOneBy（）来检索俱乐部以获得概述。你可以看到俱乐部的所有数据。

现在我想知道有多少短信粉丝。我该怎么做？

Answer 1

这应该让你开始运行。我将所有代码放在控制器中，以便您理解。

 <?php

 namespace Acme\YourBundle\Controller;

 use Symfony\Component\DependencyInjection\ContainerAware;

 class YourBundle extends ContainerAware

    /**
     * @return EntityManager
     */
    protected function getEntityManager()
    {
        return $this->container
            ->get('doctrine')
            ->getEntityManager();
    }

    /**
     * Get the number of followers for a particular class
     *
     * @param string The class 
     * @return int The number of followers
     */
    protected function getNumberOfSMSFollowers($class)
    { 
        $entityManager = $this->container
            ->get('doctrine')
            ->getEntityManager();

        $queryBuilder = $entityManager
            ->createQueryBuilder()
            ->select('count(f.id)')
        //  from the appropriate class
            ->from($class, 'c')
            ->innerJoin('c.smsfollowers','f');

        return $queryBuilder
            ->getQuery()
            ->getSingleScalarResult();
    }

     /**
     * Get the number of followers in 2 different entities
     *
     * @return response The response you wish to give
     */
    public function getNumberOfFollowersAction()
    {
        // Your classes
        $userClass ="Acme\UserBundle\User";
        $clubClass ="Acme\ClubBundle\Club";

        $nbFollowersInUserClass = $this->getNumberOfSMSFollowers($userClass);
        echo $nbFollowersInUserClass;

        $nbFollowersInClubClass = $this->getNumberOfSMSFollowers($userClass);
        echo $nbFollowersInClubClass;

       //...
    }
}

Doctrine 2 EM - ＆gt;从1个表中获得2个实体的结果

1 个答案: