Symfony / Doctrine 错误：“未定义类 'FROM'。”在 getResult() 上

Question

我正在开发我的第一个 symfony 应用程序，在尝试使用 queryBuilder 时，我已经为一个问题苦苦挣扎了几个小时。

我正在尝试执行 SQL 查询并收到以下错误：

request.CRITICAL：未捕获的 PHP 异常 Doctrine\ORM\Query\QueryException：“[语义错误] 第 0 行，'FROM StatsBundle\Entity\PlayerRealMatch' 附近的第 288 列：错误：未定义类 'FROM'。”

基本上，我存储的是足球运动员的评分和进球数，现在我想检索它们的聚合，包括总和和平均值。

我在一个服务里面，我正在调用我的PlayerRealMatchRepository里面的一个方法，这个方法的核心代码如下：

        $qb = $this->createQueryBuilder('prm');
        $qb->select(
            "SUM(prm.has_started) as tit,
            SUM(prm.has_entered) as rempl,
            SUM(prm.yellow_cards) as yc,
            SUM(prm.red_card) as rc,
            SUM(prm.goals) AS gf,
            SUM(prm.own_goals) as ga,
            AVG(prm.rating) as avg"
        )
            ->innerJoin('prm.realMatch', 'rm')
            ->where('prm.playerId = :idPlayer')
            ->groupBy('rm.season')
            ->setParameter('idPlayer', $player->getId())
            ->getQuery();
        $query =$qb->getQuery();
        $seasonData = $query->getResult();

如果我用我的调试器查看 $query 对象的 _dql 属性，这就是我所拥有的：

SELECT SUM(prm.has_started) as tit,
                SUM(prm.has_entered) as rempl,
                SUM(prm.yellow_cards) as yc,
                SUM(prm.red_card) as rc,
                SUM(prm.goals) AS gf,
                SUM(prm.own_goals) as ga,
                AVG(prm.rating) as avg 
FROM StatsBundle\Entity\PlayerRealMatch prm 
INNER JOIN prm.realMatch rm 
WHERE prm.playerId = :idPlayer 
GROUP BY rm.season

在我看来，这并没有那么糟糕，你们知道这里出了什么问题吗？

注意：这是我试图实现的查询示例，它直接在我的数据库上完美运行：

SELECT SUM(prm.has_started) as tit,
                SUM(prm.has_entered) as rempl,
                SUM(prm.yellow_cards) as yc,
                SUM(prm.red_card) as rc,
                SUM(prm.goals) AS gf,
                SUM(prm.own_goals) as ga,
                AVG(prm.rating) as avg 
FROM player_real_match prm 
INNER JOIN real_match rm ON prm.real_match_id = rm.id 
WHERE prm.player_id = 327 
GROUP BY rm.season;

详情如下

3 个实体：

• 播放器
• RealMatch：关于比赛的一般数据
• PlayerRealMatch : 球员在比赛中的表现

下面是它们各自配置的摘录，以显示它们的链接方式。

StatsBundle\Entity\Player: 
...
    manyToOne:
        real_team:
            targetEntity: RealTeam
            inversedBy: players
            joinColumn:
                onDelete: CASCADE
                name: real_team_id
                referencedColumnName: id
    oneToMany:
        player_real_matches:
            targetEntity: PlayerRealMatch
            mappedBy: player 
...

---

StatsBundle\Entity\RealMatch:
...
    home_team:
        targetEntity: RealTeam
        inversedBy: home_matches
        joinColumn:
            onDelete: CASCADE
            name: home_team_id
            referencedColumnName: id
    away_team:
        targetEntity: RealTeam
        inversedBy: away_matches
        joinColumn:
            onDelete: CASCADE
            name: away_team_id
            referencedColumnName: id
oneToMany:
    player_real_matches:
        targetEntity: PlayerRealMatch
        mappedBy: real_match
...

---

StatsBundle\Entity\PlayerRealMatch:
...
manyToOne:
    real_match:
        targetEntity: RealMatch
        inversedBy: player_real_matches
        joinColumn:
            onDelete: CASCADE
            name: real_match_id
            referencedColumnName: id
    player:
        targetEntity: Player
        inversedBy: player_real_matches
        joinColumn:
            onDelete: CASCADE
            name: player_id
            referencedColumnName: id
...

---

从服务调用存储库方法

    foreach ($players as $player) {
        $this->aggregatePlayerData($player, $match);
    }

    private function aggregatePlayerData(Player $player, RealMatch $match)
    {
        $playerStats = $this->_em
            ->getRepository('StatsBundle:PlayerRealMatch')
            ->getAggregatedStats($player, $match);
    }

public function __construct(EntityManager $entityManager)
{
    $this->_em = $entityManager;
}

这里是关于我的服务的 services.yml

stats.aggregator:
    class: StatsBundle\Service\Aggregator
    arguments: [ "@doctrine.orm.entity_manager"]

存储库方法

 /**
 * getAggregatedStats
 *
 * @param $player the player entity
 * @param RealMatch $match  the real match entity
 *
 * @return array
 */
public function getAggregatedStats($player, RealMatch $match)
{

    $qb = $this->createQueryBuilder('prm');
    $qb->select(
        "SUM(prm.has_started) as tit,
        SUM(prm.has_entered) as rempl,
        SUM(prm.yellow_cards) as yc,
        SUM(prm.red_card) as rc,
        SUM(prm.goals) AS gf,
        SUM(prm.own_goals) as ga,
        AVG(prm.rating) as avg"
    )
    ->from('StatsBundle:PlayerRealMatch', 'prm')
    ->innerJoin('prm.realMatch', 'rm')
    ->where('prm.playerId = :idPlayer')
    ->groupBy('rm.season')
    ->setParameter('idPlayer', $player->getId())
    ->getQuery();
    $query = $qb->getQuery();
    $seasonData = $query->getResult();

    return $seasonData;
}

抱歉，这篇文章太长了，我试图尽可能清楚地记录下来。 非常感谢您的帮助！

Answer 1

您正在尝试使用保留的 sql 字作为列名， 尝试改变

"AVG(prm.rating) as avg" -> "AVG(prm.rating) as avgRating"

Answer 2

我终于找到了问题，我相信这是一个经典的初学者错误：

在我的选择指令中，我使用了小写属性，因为这是我的 SQL 列的格式。

但是，我的实体属性并非如此。所以这是我的选择指令的正确语法

   "SUM(prm.hasStarted) as tit,
    SUM(prm.hasEntered) as rempl,
    SUM(prm.yellowCards) as yc,
    SUM(prm.redCard) as rc,
    SUM(prm.goals) as gf,
    SUM(prm.ownGoals) as ga,
    AVG(prm.rating) as avg"

因此结论是：在执行 DQL 时，请始终参考您的实体属性，而不是您的数据库列。

虽然错误消息很奇怪，但我希望更明确一些，例如“实体 X 没有属性 Y”

非常感谢 Azam Alvi 抽出宝贵时间。

Answer 3

您没有在查询中给出 from 字段尝试这样做

$qb = $this->createQueryBuilder('prm');
    $qb->select(
        "SUM(prm.has_started) as tit,
        SUM(prm.has_entered) as rempl,
        SUM(prm.yellow_cards) as yc,
        SUM(prm.red_card) as rc,
        SUM(prm.goals) AS gf,
        SUM(prm.own_goals) as ga,
        AVG(prm.rating) as avg"
    )
        ->from('StatsBundle:PlayerRealMatch ', 'prm') // this one is missing
        ->innerJoin('prm.realMatch', 'rm')
        ->where('prm.playerId = :idPlayer')
        ->groupBy('rm.season')
        ->setParameter('idPlayer', $player->getId());

    $seasonData = $qb->getQuery()->getResult();