Symfony2 &原则:创建自定义 SQL 查询

Symfony2 amp; Doctrine: Create custom SQL-Query(Symfony2 amp;原则:创建自定义 SQL 查询)

问题描述

如何使用 Doctrine 在 Symfony2 中创建自定义 SQL 查询?或者没有教义，我不在乎.

How can I create a custom SQL query in Symfony2 using Doctrine? Or without Doctrine, I don't care.

不能这样工作:

    $em = $this->getDoctrine()->getEntityManager();
    $em->createQuery($sql);
    $em->execute();

谢谢.

推荐答案

你可以直接从Entity Manager中获取Connection对象，并通过它直接运行SQL查询:

You can get the Connection object directly from the Entity Manager, and run SQL queries directly through that:

$em = $this->getDoctrine()->getManager(); // ...or getEntityManager() prior to Symfony 2.1
$connection = $em->getConnection();
$statement = $connection->prepare("SELECT something FROM somethingelse WHERE id = :id");
$statement->bindValue('id', 123);
$statement->execute();
$results = $statement->fetchAll();

但是，除非真的有必要，否则我建议不要这样做... Doctrine 的 DQL 几乎可以处理您可能需要的任何查询.

However, I'd advise against this unless it's really necessary... Doctrine's DQL can handle almost any query you might need.

官方文档:https://www.doctrine-project.org/projects/doctrine-dbal/en/2.9/reference/data-retrieval-and-manipulation.html

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