Doctrine 2 EM - >从2个实体获得结果1个表

Question

我在Doctrine：User和Club中有2个实体。两者都包含此文本的权利：

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

另一个目标实体是俱乐部。

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

现在我想表明有多少SMS追随者。我应该怎么做？

Answer 1

这应该让你启动并运行。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; 

     //... 
    } 
}