更改主键值的getResult数组键

Question

是否可以在Doctrine2中更改getResult()的数组键值？

例:

$qb->select('t.id, t.name')->from('Table', 't');

当我打印这个时,我得到了,这不是我想要的:

print_r($qb->getQuery()->getResult());

//Print result: Array ( [0] => Array ( [id] => 20 [name] => Name1 ) [1] => Array ( [id] => 21 [percentagem] => Name2 ) )

我想要的是:

Array ( [20] => Array ( [id] => 20 [name] => Name1 ) [21] => Array ( [id] => 21 [percentagem] => Name2 ) )

建议,提示将不胜感激.

Answer 1

我真的很高兴这件事有多酷:

$query = $this->getEntityManager()->createQuery('
            SELECT user FROM UserBundle:User user
            INDEX BY user.id
            WHERE user.id = 1
            '
        );

INDEX BY构造不会直接转换为SQL,但会影响对象和数组的水合作用.在每个FROM和JOIN子句之后,您可以指定此类应在结果中编入索引的字段.默认情况下,结果会以从0开始的数字键递增.但是使用INDEX BY,您可以指定任何其他列作为结果的键,但它实际上只对主要或唯一字段有意义.

来源:使用INDEX BY的Doctrine ORM 2文档

• 请在WHERE之前使用INDEX BY

Answer 2

但是,为了完整起见,您可以对查询构建器执行相同操作,如下所示:

$queryBuilder = $this->getEntityManager()->createQueryBuilder();

$queryBuilder
    ->select('user')
    ->from('UserBundle:User', 'user', 'user.id')
    ->where('user.id = :userId')
    ->setParameter('userId', $userId)
;

var_dump(
    $queryBuilder->getQuery()->getArrayResult()
);

如您所见,index by option可用作查询构建器from方法的第三个参数:

/**
 * Creates and adds a query root corresponding to the entity identified by the given alias,
 * forming a cartesian product with any existing query roots.
 *
 * <code>
 *     $qb = $em->createQueryBuilder()
 *         ->select('u')
 *         ->from('User', 'u')
 * </code>
 *
 * @param string $from    The class name.
 * @param string $alias   The alias of the class.
 * @param string $indexBy The index for the from.
 *
 * @return QueryBuilder This QueryBuilder instance.
 */
public function from($from, $alias, $indexBy = null)
{
    return $this->add('from', new Expr\From($from, $alias, $indexBy), true);
}