查询EXISTS for Doctrine Symfony2 [英] Query with EXISTS for Doctrine Symfony2
本文介绍了查询EXISTS for Doctrine Symfony2的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
如何使用Query Builder实现以下查询?
How can I implement the following query with Query Builder?
SELECT *
FROM t
WHERE t.status = 1
OR EXISTS(SELECT *
FROM r
WHERE r.t_id = t.id
AND r.status = 1
)
没有存在检查的部分很容易,但是有一种实现 EXISTS的方法
?
The part without exist check is easy, but is there a way to implement the EXISTS
?
推荐答案
您需要使用两个查询构建器:
You need to use two query builders:
$queryBuilder->expr()->exists($subQueryBuilder->getDql());
或直接使用DQL:
$queryBuilder->expr()->exists('SELECT *
FROM r
WHERE r.t_id = t.id
AND r.status = 1'
);
您将在文档中找到更多示例: http://doctrine-orm.readthedocs.org/en/latest/reference/query-builder.html
You'll find more examples in the docs: http://doctrine-orm.readthedocs.org/en/latest/reference/query-builder.html
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