教义2查询生成器和leftJoin子查询 [英] Doctrine 2 query builder and leftJoin subquery
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问题描述
我有以下实体。
实体产品:
namespace App\Model;
use Nette\Object;
use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Collections\ArrayCollection;
/**
* @ORM\Entity
*/
class Product extends Object
{
/**
* @ORM\Id
* @ORM\Column(type="integer")
* @ORM\GeneratedValue
* @var int
*/
private $id;
/**
* @ORM\ManyToOne(targetEntity="Category")
* @ORM\JoinColumn(name="category_id", referencedColumnName="id", onDelete="SET NULL")
* @var int
*/
private $category;
/**
* @ORM\OneToOne(targetEntity="Image", cascade={"persist", "remove"})
* @var Image
*/
private $image;
/**
* @ORM\OneToOne(targetEntity="Image", cascade={"persist", "remove"})
* @ORM\JoinColumn(nullable=true, onDelete="SET NULL")
* @var Image
*/
private $backgroundImage;
/**
* @ORM\ManyToOne(targetEntity="Layer")
* @ORM\JoinColumn(name="methodOfPreparing_id", referencedColumnName="id", onDelete="SET NULL")
* @var Layer|NULL
*/
private $methodOfPreparing;
}
实体层:
/**
* @ORM\Entity
*/
class Layer extends Object
{
/**
* @ORM\Id
* @ORM\Column(type="integer")
* @ORM\GeneratedValue
* @var int
*/
private $id;
/**
* @ORM\OneToMany(targetEntity="State", mappedBy="layer", indexBy="position", cascade={"persist", "remove"})
* @var ArrayCollection
*/
private $states;
/**
* @ORM\Column(type="string")
* @var string
*/
private $name;
/**
* @ORM\Column(type="integer")
* @var int
*/
private $position;
}
实体状态:
/**
* @ORM\Entity
*/
class State extends Object
{
/**
* @ORM\Id
* @ORM\Column(type="integer")
* @ORM\GeneratedValue
* @var int
*/
private $id;
/**
* @ORM\Column(type="string")
* @var string
*/
private $name;
/**
* @ORM\ManyToOne(targetEntity="Layer", inversedBy="states")
* @ORM\JoinColumn(name="layer_id", referencedColumnName="id", onDelete="CASCADE")
* @var Layer
*/
private $layer;
/**
* @ORM\Column(type="integer")
* @var int
*/
private $position;
/**
* @ORM\Column(type="integer", columnDefinition="int(1) NOT NULL")
* @var bool
*/
private $active;
}
骨架查询:
SELECT Product
FROM product
LEFT JOIN
(SELECT Layer, State
FROM layer
INNER JOIN state ON layer.id = state.layer_id
WHERE state.active = 1
) sub
ON sub.id = product.methodOfPreparing_id
我需要使用查询生成器创建DQL查询。
是否可以左联接子查询?
I need to create a DQL query using the query builder. It is possible left join subquery?
推荐答案
您可以在DQL中使用WITH子句作为LEFT JOIN子查询。联接条件。
You can do LEFT JOIN subqueries in DQL using a WITH clause as the JOIN criteria.
例如,
SELECT st
FROM SomeThings st
LEFT JOIN st.other ot WITH ot.id = (
SELECT ot2
FROM OtherThings ot2
WHERE ot2.id = 'some ID'
)
WHERE blah blah blah
...或...
SELECT st
FROM SomeThings st
LEFT JOIN st.others ot WITH ot.id IN (
SELECT ot2
FROM OtherThings ot2
WHERE ot2.status = true
)
WHERE blah blah blah
...等等。
以下是我正在研究的代码库中的工作示例:
Here are working samples from a codebase I work on:
SELECT f, df, d
FROM Entities\Main_frames f
LEFT JOIN f.dashboards df WITH df.dashboard IN (
SELECT dd
FROM Entities\Main_dashboards dd
WHERE dd.dashboard_addedby = :createdBy
AND dd.status = true
)
LEFT JOIN df.dashboard d
INDEX BY f.id
WHERE f.createdBy = :createdBy
AND f.frame_type IN (2, 6)
AND f.status = true
ORDER BY f.createdDate
排序
...和...
... and ...
SELECT m, cm, s
FROM Entities\Main_modules m
LEFT JOIN m.companyModules cm WITH cm.companyid = :companyId
LEFT JOIN m.subscriptions s WITH s.id = (
SELECT ss
FROM Entities\Subscriptions ss
WHERE ss.company = :companyId
AND ss.module = m.id
AND ss.createdDate = (
SELECT MAX(sss.createdDate)
FROM Entities\Subscriptions sss
WHERE sss.company = :companyId
AND sss.module = m.id
)
)
WHERE m.id <= 4
ORDER BY m.id
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