Question

我有MoneyChanger实体与AddTransaction实体有多对多关系。

我希望获取属于AddTransaction实体的MoneyChanger实体的所有行。

这是我桌子的结构。

MoneyChanger tbl

id  | created_at
----------------
1   | 2017-08-28 
2   | 2017-08-28 
3   | 2017-08-28

money_changer_add_transaction tbl

money_changer_id: |  add_transaction_id
---------------------------------------
       1          |       1
---------------------------------------
       1          |       2
---------------------------------------
       1          |       3
---------------------------------------
       2          |       4
---------------------------------------
       3          |       5

add_transaction tbl

id
---
1
2
3
4
5

这是我到目前为止所做的，但我没有运气。

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

            $repository = $em->getRepository('MontealBundle:MoneyChanger');
            $query = $repository->createQueryBuilder('p')
                   ->where('p.createdAt BETWEEN :startDate AND :endDate')
                   ->andWhere('p.type = :type')
                   ->setParameter('startDate', $startDate)
                   ->setParameter('endDate', $endDate)
                   ->setParameter('type', $type)
                   ->getQuery();

            $records = $query->getResult();

            foreach ($records as $record) {

                echo "</b>".$record->getId()."</b></br>";

                $transactions = $em->getRepository('MontealBundle:AddTransaction');
                $qry = $repository->createQueryBuilder('a')
                    ->innerJoin('a.money_changer_add_transaction', 'm')
                    ->where('a.money_changer_id = :money_changer_id')
                    ->setParameter('money_changer_id', $record->getId())
                    ->getQuery();

                $transactions = $qry->getResult();

                dump($transactions);

                foreach ($transactions as $trans) {
                   echo "</b>".$trans->getId()."</b></br>"; 
                }
            }

这是MoneyChanger实体

/**
 * @ORM\Entity
 * @ORM\Table(name="money_changer")
 * @ORM\Entity(repositoryClass="MontealBundle\Repository\MoneyChangerRepository")
 * @ORM\HasLifecycleCallbacks()
 */
class MoneyChanger
{
    /**
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     * @ORM\Column(type="integer")
     */
    private $id;

    /**
     * @ORM\ManyToMany(targetEntity="AddTransaction", inversedBy="moneyChanger", cascade={"persist"})
     * @ORM\JoinTable(name="money_changer_add_transaction",
     *      joinColumns={@ORM\JoinColumn(name="money_changer_id", referencedColumnName="id")},
     *      inverseJoinColumns={@ORM\JoinColumn(name="add_transaction_id", referencedColumnName="id", unique=true)}
     *   )
     */
    private $addTransaction;

    public function __construct()
    {
        $this->addTransaction = new ArrayCollection();
    }

这是AddTransaction实体

/**
 * @ORM\Entity
 * @ORM\Table(name="add_transaction")
 */
class AddTransaction 
{

    /**
     * @ORM\ManyToMany(targetEntity="MoneyChanger", mappedBy="addTransaction", cascade={"persist"})
     *  
     */
    private $moneyChanger;

     public function __construct(){
        $this->moneyChanger = new ArrayCollection();
    }

错误：

Class MontealBundle\Entity\MoneyChanger has no association named money_changer_add_transaction

Answer 1

试试这个;

$qry = $repository->createQueryBuilder('a')
     ->innerJoin('a.addTransaction', 'm')
     ->where('a.id = :money_changer_id')
     ->setParameter('money_changer_id', $record->getId())
     ->getQuery();

Answer 2

要获取MoneyChanger对象的相关事务，您的第一个查询构建器很好，当您循环访问这些记录时，它会为您提供MoneyChanger个对象，因此无需再次运行查询构建器来获取相关AddTransaction个对象，因为每个MoneyChanger对象都有一组相关的AddTransaction个对象，您只需调用getter方法并遍历AddTransaction个对象，如

$records = $query->getResult();
foreach ($records as $record) {
    /* your other code */
    $transactions = $record->getAddTransaction();
    foreach ($transactions as $trans) {
        echo "</b>".$trans->getId()."</b></br>"; 
    }

}

另外，请确保您的MoneyChanger课程具有以下方法，该方法将包含ArrayCollection个相关AddTransaction个对象

public function getAddTransaction()
{
    return $this->addTransaction;
}

参考5.9. Many-To-Many, Bidirectional

Symfony Doctrine多对多获取数据

2 个答案: