Symfony2 Error: Object of class Doctrine\ORM\EntityManager could not be converted to string

Question

我有 2 个不相关的实体：外部和内部。我需要联合 select 实体的所有结果。我正在使用 ResultSetMapping 和 Native SQL 来执行此操作：

 $em = $this->getDoctrine()
        ->getManager()->getConnection();
 $rsm = new \Doctrine\ORM\Query\ResultSetMapping();
    $rsm->addEntityResult('ExternalBundle:External', 'e');
    $rsm->addFieldResult('e', 'id', 'id');
    $rsm->addFieldResult('e', 'status', 'status');
    $rsm->addFieldResult('e', 'name', 'name');
    $rsm->addEntityResult('InternalBundle:Internal', 'i');
    $rsm->addFieldResult('i', 'id', 'id');
    $rsm->addFieldResult('i', 'status', 'status');
    $rsm->addFieldResult('i', 'name', 'name');
    $sql = "SELECT e.*
FROM external_print e
UNION
SELECT i.*
FROM internal_print i";
    $objects = $this->$em->createNativeQuery($sql, $rsm)->getResult();

我不断收到此错误：可捕获的致命错误：class Doctrine\ORM\EntityManager 的对象无法转换为字符串。

需要修复什么？

Answer 1

你有一个代码错误而不是

$objects = $this->$em->createNativeQuery($sql, $rsm)->getResult();

只使用

$objects = $em->createNativeQuery($sql, $rsm)->getResult();

Symfony2 Error: Object of class Doctrine\ORM\EntityManager could not be converted to string

Symfony2 Error: Object of class Doctrine\ORM\EntityManager could not be converted to string

symfony

doctrine-orm

doctrine

native-sql

sqlresultsetmapping