不允许 ResultSetMappingBuilder 工作的原则

2022-01-16 00:00:00 php symfony doctrine doctrine-orm

我将 Symfony 2 与教义一起使用.我已经建立了一个具有自定义查找功能的自定义存储库.当它加入子查询时，我很确定从我所读到的内容中，我需要使用 ResultSetMappingBuilder 从查询中获取结果.但我不断收到以下错误:

I'm using Symfony 2 with doctrine. I've set up a custom repository with a custom find function. As it joins to a subquery I'm pretty sure from what I've read that I'll need to use the ResultSetMappingBuilder to get the results back from the query. But I keep getting the following error:

The column 'id' conflicts with another column in the mapper.

我的代码是:

    $sql ="SELECT c.id as cid, c.country, c.rank, c.continent, q.*
        FROM country c
        INNER JOIN (
            SELECT d.* , MAX( d.rating ) AS maxrating
            FROM ducks d
            GROUP BY d.country_id
        )q ON ( q.country_id = c.id )";

    $rsm = new DoctrineORMQueryResultSetMappingBuilder($this->getEntityManager());
    $rsm->addRootEntityFromClassMetadata('WfukDuckBundleEntityCountry', 'c', array('id' => 'cid'));
    $rsm->addJoinedEntityFromClassMetadata('WfukDuckBundleEntityDucks', 'ducks', 'c', 'country_id');

    $query = $this->getEntityManager()->createNativeQuery($sql, $rsm);
    return $query->getResult();

SQL 查询自行运行，没有任何问题，并返回我期望的结果.

The SQL query runs on it's own without any problems and returns the results I'd expect.

更新，我已经通过重新映射 addRootEntityFromClassMetadata 上的 id 字段解决了 id 问题，但修改后的joinedEntity 仍然存在问题:

UPDATE, I've fixed the id issue by remapping the id field on the addRootEntityFromClassMetadata, but I've still got a remaining problem with the revised joinedEntity:

    $rsm->addJoinedEntityFromClassMetadata('WfukDuckBundleEntityDucks', 'ducks', 'c', 'country_id');

我收到以下错误:

Notice: Undefined index: country_id in E:DocumentswfukWorkduck travelswampvendordoctrinelibDoctrineORMInternalHydrationObjectHydrator.php line 85

我很确定这是调用中的最后一个值 country_id，但我不能 100% 确定这是什么.这里的解释:http://readthedocs.org/docs/doctrine-orm/en/latest/reference/native-sql.html 不太清楚，我不完全理解类文档块的描述.

I'm pretty sure this is down to the last value in the call, country_id, but I'm not 100% sure what this is. The explanation here: http://readthedocs.org/docs/doctrine-orm/en/latest/reference/native-sql.html isn't too clear and I don't fully understand the description from the class docblock.

它给出的错误是:

The error it gives is:

The column 'id' conflicts with another column in the mapper.

但我已为其中一个结果重命名了 id 字段，因此结果集只有一列称为id".

Yet I have renamed the id field for one of the results so the result set only has one column called 'id'.

错误的堆栈跟踪显示它被抛出这里:

The stacktrace on the error shows it's being thrown here:

at ResultSetMappingBuilder ->addAllClassFields ('WfukDuckBundleEntityDucks', 'q', array())
in E:DocumentswfukWorkduck travelswampvendordoctrinelibDoctrineORMQueryResultSetMappingBuilder.php at line 71

我怀疑这很明显，但是我可以在任何地方找到有关此功能的文档方式并不多...

I suspect it's something obvious but there's not much in the way of documentation on this function that I could find anywhere...

已解决:

我不能在另外 5 小时内将其添加为答案，因此为避免任何人浪费时间回答此问题，答案是:

I can't add this as an answer for another 5 hours, so to avoid anyone wasting time answering this the answer is:

对于任何有同样问题的人，问题出在这一行发送的第四个参数:

For anyone who has the same problem the problem was with the 4th parameter sent on this line:

$rsm->addJoinedEntityFromClassMetadata('WfukDuckBundleEntityDucks', 'ducks', 'c', 'ducks');

这应该包含 Country 类中的字段，我用来在其中存储鸭子的 arrayCollection.

Which should have held the field within the Country class that I was using to store the arrayCollection of ducks within it.

推荐答案

在问题解决后结束:

对于任何有同样问题的人，问题出在这一行发送的第四个参数:

For anyone who has the same problem the problem was with the 4th parameter sent on this line:

$rsm->addJoinedEntityFromClassMetadata('WfukDuckBundleEntityDucks', 'ducks', 'c', 'ducks');

这应该包含 Country 类中的字段，我用来在其中存储鸭子的 arrayCollection.

Which should have held the field within the Country class that I was using to store the arrayCollection of ducks within it.

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