Doctrine2 在字段数组中按值查找 [英] Doctrine2 find by value in field array

问题描述

我想知道是否有办法搜索看起来像这样的文档字段:

i wonder if there is a way to search for a document field looking like :

/**
 * @var array
 *
 * @ORMColumn(name="tags", type="array", nullable=true)
 */
private $tags;

在数据库中看起来像 php 数组解释:

which in database looks like php array interpretation :

a:3:{i:0;s:6:"tagOne";i:1;s:6:"tagTwo";i:2;s:8:"tagThree";}

现在我尝试通过标签搜索实体

now i try to search the entity by a tag tryed

public function findByTag($tag) {
    $qb = $this->em->createQueryBuilder();
    $qb->select('u')
        ->from("myBundle:Entity", 'u')
        ->where('u.tags LIKE :tag')
        ->setParameter('tag', $tag );
    $result=$qb->getQuery()->getResult();
    return $result;
}

总是返回 array[0]只是不明白

我能够更改它们的保存方式任何帮助，在此先感谢

i am able to change the way how they are saved for any help, thanks in advance

推荐答案

你需要为 % 在你想要的值之前和/或之后定义一个 literal 标签搜索;在这种情况下，您甚至不需要在短语前后加上单引号:

You need to define a literal tag for % before and/or after the value you want to search; in this case you won't even need to have single quotation before and after your phrase:

$qb = $this->em->createQueryBuilder();
$qb->select('u')
    ->from("myBundle:Entity", 'u')
    ->where($qb->expr()->like('u.tags', $qb->expr()->literal("%$tag%")))
$result=$qb->getQuery()->getResult();
return $result;

您可以关注所有 Doctrine expr 类

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