我有一个与实体类别相关的实体视频,我需要使用Doctrine QueryBuilder运行此SQL,我可以在所有视频中获得最常用的类别(1000 +):
SELECT c.*
FROM Video v
INNER JOIN video_category vc ON vc.video_id = v.id
INNER JOIN Category c ON vc.category_id = c.id
GROUP BY c.id
HAVING COUNT(v.id) > 1000
ORDER BY c.name ASC;
我的查询编译器:
$queryBuilder = $this->getEntityManager()
->createQueryBuilder()
->select('c')
->from('AcmeVideoBundle:Video', 'v')
// Can Doctrine join itself silently with relational info in the Entities?
->join('AcmeCategoryBundle:Category', 'c', Expr\Join::WITH, 'v.id = c.id')
->groupBy('c.id')
->having('COUNT(v.id) > 1000')
->orderBy('c.name', 'ASC')
->getQuery();
但queryBuilder输出的SQL查询是这样的:
SELECT c0_.id AS id0, c0_.NAME AS name1
FROM Video v1_
INNER JOIN Category c0_ ON (v1_.id = c0_.id)
GROUP BY c0_.id
HAVING COUNT(v1_.id) > 1000
ORDER BY c0_.NAME ASC
没有关系表(video_category)
实体映射:
/**
* Video
*
* @ORM\Table
* @ORM\Entity(repositoryClass="Acme\VideoBundle\Entity\VideoRepository")
*/
class Video
{
/**
* @ORM\Id
* @ORM\Column(type="integer")
* @ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* @ORM\ManyToMany(targetEntity="Acme\CategoryBundle\Entity\Category", cascade={"persist"})
*/
private $category;
// More fields, getters and setters etc...
}
/**
* Category
*
* @ORM\Table
* @ORM\Entity(repositoryClass="Acme\CategoryBundle\Entity\CategoryRepository")
*/
class Category
{
/**
* @ORM\Id
* @ORM\Column(type="integer")
* @ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* @ORM\Column(type="string", length=255)
*/
private $name;
// More fields, getters and setters etc...
}
如何使用关系表与doctrine Querybuilder一起运行原始SQL查询?我错过了什么?
信息:当我找到{field},persist,flush,clear,所有实体工作正常,Doctrine关系都没问题,我有一个Video,Category和video_category表,原始SQL查询工作正常。
答案 0 :(得分:15)
// Can Doctrine join itself silently with relational info in the Entities?
->join('AcmeCategoryBundle:Category', 'c', Expr\Join::WITH, 'v.id = c.id')
是的!事实上,这是使用ORM的主要原因之一,例如Doctrine 2.
尝试:
->leftJoin('v.category','c')
手册进入更多细节但奇怪的是似乎没有连接示例。因此常见的困惑。
http://docs.doctrine-project.org/en/latest/reference/query-builder.html
你可能没有意识到这一点,但联合国通过了一项禁止使用别名缩写的决议。为了安全起见,请尝试:
$queryBuilder = $this->getEntityManager()
->createQueryBuilder()
->addSelect('category')
->from('AcmeVideoBundle:Video', 'video')
->leftJoin('video.category', 'category')
->groupBy('category.id')
->having('COUNT(video.id) > 1000')
->orderBy('category.name', 'ASC')
->getQuery();
答案 1 :(得分:-1)
好的,解决了,问题是实体没有完全映射到ManyToMany双向关系。
实体现在是:
class Video
{
/**
* @var ArrayCollection
*
* @ORM\ManyToMany(targetEntity="Acme\CategoryBundle\Entity\Category", inversedBy="video") // Note the inversedBy key
*/
private $category;
}
class Category
{
/**
* @var Video
*
* @ORM\ManyToMany(targetEntity="Acme\VideoBundle\Entity\Video", mappedBy="category") // Again the inversed
*/
private $video; // New field for bidirectional ManyToMany
}
最终的QueryBuilder工作(现在使用完全别名版本:P):
$queryBuilder = $this->getEntityManager()
->createQueryBuilder()
->select('category')
->from('AcmeCategoryBundle:Category', 'category')
->join('category.video', 'video')
->groupBy('category.id')
->having('COUNT(video.id) > 1000')
->orderBy('category.name', 'ASC')
->getQuery();
祝你好运