Php 查询生成器-获取另一个查询旁边的行数
我正在参加一个摄影比赛，我有这样的关系Php 查询生成器-获取另一个查询旁边的行数,php,mysql,doctrine,symfony,query-builder,Php,Mysql,Doctrine,Symfony,Query Builder,我正在参加一个摄影比赛，我有这样的关系 所有图像都有和id、标题、作者和文件名 namespace AppBundle\Entity; use Doctrine\ORM\Mapping as ORM; /** * @ORM\Entity */ class Image { /** * @ORM\Id * @ORM\Column(type="integer") * @ORM\GeneratedValue(strategy="AUTO") *
- 所有图像都有和id、标题、作者和文件名
namespace AppBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* @ORM\Entity
*/
class Image {
/**
* @ORM\Id
* @ORM\Column(type="integer")
* @ORM\GeneratedValue(strategy="AUTO")
*/
protected $id;
/**
* @ORM\Column(type="string", length=255, name="file_name")
* @var string $fileName
*/
protected $fileName;
/**
* @ORM\Column(type="string", length=255, name="title", nullable=true)
* @var string $title
*/
protected $title = null;
/**
* @ORM\Column(type="string", length=255, name="author", nullable=true)
* @var string $author
*/
protected $author = null;
/**
* @ORM\Column(type="datetime", name="upload_at")
*/
protected $uploadDate;
/**
* @ORM\Column(type="boolean", name="in_pool")
*/
protected $inPool;
/**
* Get id
*
* @return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set fileName
*
* @param string $fileName
*
* @return Image
*/
public function setFileName($fileName)
{
$this->fileName = $fileName;
return $this;
}
/**
* Get fileName
*
* @return string
*/
public function getFileName()
{
return $this->fileName;
}
/**
* Set title
*
* @param string $title
*
* @return Image
*/
public function setTitle($title)
{
$this->title = $title;
return $this;
}
/**
* Get title
*
* @return string
*/
public function getTitle()
{
return $this->title;
}
/**
* Set author
*
* @param string $author
*
* @return Image
*/
public function setAuthor($author)
{
$this->author = $author;
return $this;
}
/**
* Get author
*
* @return string
*/
public function getAuthor()
{
return $this->author;
}
/**
* Set uploadDate
*
* @param \DateTime $uploadDate
*
* @return Image
*/
public function setUploadDate($uploadDate)
{
$this->uploadDate = $uploadDate;
return $this;
}
/**
* Get uploadDate
*
* @return \DateTime
*/
public function getUploadDate()
{
return $this->uploadDate;
}
/**
* Set inPool
*
* @param boolean $inPool
*
* @return Image
*/
public function setInPool($inPool)
{
$this->inPool = $inPool;
return $this;
}
/**
* Get inPool
*
* @return boolean
*/
public function getInPool()
{
return $this->inPool;
}
public function __construct()
{
$this->uploadDate = new \DateTime('now');
$this->inPool = false;
}
}
namespace AppBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* @ORM\Entity
*/
class Image {
/**
* @ORM\Id
* @ORM\Column(type="integer")
* @ORM\GeneratedValue(strategy="AUTO")
*/
protected $id;
/**
* @ORM\Column(type="string", length=255, name="file_name")
* @var string $fileName
*/
protected $fileName;
/**
* @ORM\Column(type="string", length=255, name="title", nullable=true)
* @var string $title
*/
protected $title = null;
/**
* @ORM\Column(type="string", length=255, name="author", nullable=true)
* @var string $author
*/
protected $author = null;
/**
* @ORM\Column(type="datetime", name="upload_at")
*/
protected $uploadDate;
/**
* @ORM\Column(type="boolean", name="in_pool")
*/
protected $inPool;
/**
* Get id
*
* @return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set fileName
*
* @param string $fileName
*
* @return Image
*/
public function setFileName($fileName)
{
$this->fileName = $fileName;
return $this;
}
/**
* Get fileName
*
* @return string
*/
public function getFileName()
{
return $this->fileName;
}
/**
* Set title
*
* @param string $title
*
* @return Image
*/
public function setTitle($title)
{
$this->title = $title;
return $this;
}
/**
* Get title
*
* @return string
*/
public function getTitle()
{
return $this->title;
}
/**
* Set author
*
* @param string $author
*
* @return Image
*/
public function setAuthor($author)
{
$this->author = $author;
return $this;
}
/**
* Get author
*
* @return string
*/
public function getAuthor()
{
return $this->author;
}
/**
* Set uploadDate
*
* @param \DateTime $uploadDate
*
* @return Image
*/
public function setUploadDate($uploadDate)
{
$this->uploadDate = $uploadDate;
return $this;
}
/**
* Get uploadDate
*
* @return \DateTime
*/
public function getUploadDate()
{
return $this->uploadDate;
}
/**
* Set inPool
*
* @param boolean $inPool
*
* @return Image
*/
public function setInPool($inPool)
{
$this->inPool = $inPool;
return $this;
}
/**
* Get inPool
*
* @return boolean
*/
public function getInPool()
{
return $this->inPool;
}
public function __construct()
{
$this->uploadDate = new \DateTime('now');
$this->inPool = false;
}
}
namespace AppBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* @ORM\Entity
*/
class Image {
/**
* @ORM\Id
* @ORM\Column(type="integer")
* @ORM\GeneratedValue(strategy="AUTO")
*/
protected $id;
/**
* @ORM\Column(type="string", length=255, name="file_name")
* @var string $fileName
*/
protected $fileName;
/**
* @ORM\Column(type="string", length=255, name="title", nullable=true)
* @var string $title
*/
protected $title = null;
/**
* @ORM\Column(type="string", length=255, name="author", nullable=true)
* @var string $author
*/
protected $author = null;
/**
* @ORM\Column(type="datetime", name="upload_at")
*/
protected $uploadDate;
/**
* @ORM\Column(type="boolean", name="in_pool")
*/
protected $inPool;
/**
* Get id
*
* @return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set fileName
*
* @param string $fileName
*
* @return Image
*/
public function setFileName($fileName)
{
$this->fileName = $fileName;
return $this;
}
/**
* Get fileName
*
* @return string
*/
public function getFileName()
{
return $this->fileName;
}
/**
* Set title
*
* @param string $title
*
* @return Image
*/
public function setTitle($title)
{
$this->title = $title;
return $this;
}
/**
* Get title
*
* @return string
*/
public function getTitle()
{
return $this->title;
}
/**
* Set author
*
* @param string $author
*
* @return Image
*/
public function setAuthor($author)
{
$this->author = $author;
return $this;
}
/**
* Get author
*
* @return string
*/
public function getAuthor()
{
return $this->author;
}
/**
* Set uploadDate
*
* @param \DateTime $uploadDate
*
* @return Image
*/
public function setUploadDate($uploadDate)
{
$this->uploadDate = $uploadDate;
return $this;
}
/**
* Get uploadDate
*
* @return \DateTime
*/
public function getUploadDate()
{
return $this->uploadDate;
}
/**
* Set inPool
*
* @param boolean $inPool
*
* @return Image
*/
public function setInPool($inPool)
{
$this->inPool = $inPool;
return $this;
}
/**
* Get inPool
*
* @return boolean
*/
public function getInPool()
{
return $this->inPool;
}
public function __construct()
{
$this->uploadDate = new \DateTime('now');
$this->inPool = false;
}
}
namespace AppBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* @ORM\Entity
*/
class Image {
/**
* @ORM\Id
* @ORM\Column(type="integer")
* @ORM\GeneratedValue(strategy="AUTO")
*/
protected $id;
/**
* @ORM\Column(type="string", length=255, name="file_name")
* @var string $fileName
*/
protected $fileName;
/**
* @ORM\Column(type="string", length=255, name="title", nullable=true)
* @var string $title
*/
protected $title = null;
/**
* @ORM\Column(type="string", length=255, name="author", nullable=true)
* @var string $author
*/
protected $author = null;
/**
* @ORM\Column(type="datetime", name="upload_at")
*/
protected $uploadDate;
/**
* @ORM\Column(type="boolean", name="in_pool")
*/
protected $inPool;
/**
* Get id
*
* @return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set fileName
*
* @param string $fileName
*
* @return Image
*/
public function setFileName($fileName)
{
$this->fileName = $fileName;
return $this;
}
/**
* Get fileName
*
* @return string
*/
public function getFileName()
{
return $this->fileName;
}
/**
* Set title
*
* @param string $title
*
* @return Image
*/
public function setTitle($title)
{
$this->title = $title;
return $this;
}
/**
* Get title
*
* @return string
*/
public function getTitle()
{
return $this->title;
}
/**
* Set author
*
* @param string $author
*
* @return Image
*/
public function setAuthor($author)
{
$this->author = $author;
return $this;
}
/**
* Get author
*
* @return string
*/
public function getAuthor()
{
return $this->author;
}
/**
* Set uploadDate
*
* @param \DateTime $uploadDate
*
* @return Image
*/
public function setUploadDate($uploadDate)
{
$this->uploadDate = $uploadDate;
return $this;
}
/**
* Get uploadDate
*
* @return \DateTime
*/
public function getUploadDate()
{
return $this->uploadDate;
}
/**
* Set inPool
*
* @param boolean $inPool
*
* @return Image
*/
public function setInPool($inPool)
{
$this->inPool = $inPool;
return $this;
}
/**
* Get inPool
*
* @return boolean
*/
public function getInPool()
{
return $this->inPool;
}
public function __construct()
{
$this->uploadDate = new \DateTime('now');
$this->inPool = false;
}
}
在投票中添加反向
/**
* @ORM\ManyToOne(targetEntity="Image", inversedBy="votes")
* @ORM\JoinColumn(onDelete="CASCADE")
*/
private $image;
在图像实体中添加属性$vots
/**
* One image has many votes
* @ORM\OneToMany(targetEntity="Vote", mappedBy="image")
*/
private $votes;
function __construct() {
$this-> votes = new ArrayCollection()
}
然后使用getter，您可以获得选票收集：
function getVotes()
{
return $this->votes;
}
ArrayCollection有count（）方法，因此您可以使用它来获取投票
实体的存储库类中的票数（它应该是VoteRepository
，如果它不存在，则创建该类）添加方法countVotesForImage
：
/**
* Method returns count of votes assigned to an Image entity
*
* @param Image $image Instance of Image entity
*
* @return int Result of count query
*/
public function countVotesForImage(Image $image)
{
$imageID = $image->getId();
if (!is_numeric($imageID)) {
// for new images which are not stored in DB
// we dont have to query database
return 0;
}
return (int) $this->createQueryBuilder('v')
->select('COUNT(v.id)')
->where('v.image = :id')
->setParameter('id', $image->getId())
->getQuery()
->getSingleScalarResult();
}
进入任何控制器后，您将能够使用它：
$image; // this variable should contain valid class of Image entity
$counter = $this->getDoctrine()->getRepository('AppBundle:Vote')
->countVotesForImage($image);
最后一步是将其传递给视图：
return $this->render(
'your/template.html.twig',
array('counter' => $counter)
);
如果要对所有图像进行所有投票，请将此方法添加到ImageRepository
：
/**
* Method returns count of votes assigned to an Image entity
*
* @return ArrayCollection
*/
public function countVotesForAllImages()
{
return $this->createQueryBuilder('i')
->select(array(
'i',
'COUNT(i.id) as counter'
))
->join('i.votes', 'v')
->groupBy('i.id')
->getQuery()
->getResult();
}
如果添加此方法，还需要添加投票实体：
/**
* This is internal variable, it does not have to be mapped into database field
* @var int Counter of votes for an Image
*/
private $counter;
/**
* Method sets internal counter of votes for an Image
*
* @param int $counter
*/
public function setCounter($counter)
{
$this->counter = $counter;
}
/**
* Method gets internal counter of votes for an Image
*
* @return int
*/
public function getCounter()
{
return $this->counter;
}
@Markownikow提出的方法也会起作用，但它会将DB中的所有投票放入内存中，将它们水合，然后在内存中作为数组项进行计数。因为这太过分了，我建议选择我的方法。使用了您的代码。我的选择如下：`$images=$em->createQueryBuilder（）->select（'i，count（i.voces））->from（'AppBundle:Image'，'i'）->orderBy（'id'，'DESC'）->getQuery（）->getResult（）；`但是我得到了一个无效的表达式。StateFieldPathExpression或`SingleValuedAssociationField应为。
此方法将DB中的所有投票放入内存，将其水合物化，然后在内存中作为数组项计数。因为这可能会有点过分，所以我建议选择我的方法（见我的答案）。我认为michail_w有更好的方法，实际上我也想提出一些类似于他在countVotesForAllImages（）方法中所做的事情，但我对正确的语法没有信心，如果关于您的错误我不太确定，但可能是因为它应该是“->orderBy（'I.id'，'DESC'））-“i”别名丢失