Doctrine2一对多/多对一的关系给出重复的记录
问题描述：
我有三个表 1）产品类别（一个类别可以有很多产品） 2）产品（一个产品应该属于一个类别，可以有0或多个图像） 3）产品图片（一个图像应该属于一个产品）Doctrine2一对多/多对一的关系给出重复的记录
现在我想从偏移0 施加8的限制的产品有6种产品在我的数据库。 我想要的是每个产品都有类别和图像的细节。为此我使用了doctrine 2关联映射。
我的实体如下： -
<?php
namespace Nitin\TestBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\Validator\Constraints as Assert;
/**
* Nitin\TestBundle\Entity\Product
*
* @ORM\Table(name="product", indexes={@ORM\Index(name="fk_product_cat", columns={"fk_product_cat"})})
* @ORM\Entity(repositoryClass="Nitin\TestBundle\Repository\ProductRepository")
*/
class Product
{
/**
* @var integer
*
* @ORM\Column(name="id", type="integer", nullable=false)
* @ORM\Id
* @ORM\GeneratedValue(strategy="IDENTITY")
*/
private $id;
/**
* @var string
*
* @ORM\Column(name="product_title", type="string", length=250, nullable=false)
* @Assert\NotBlank(message = "Please enter valid product title.")
*/
private $productTitle;
/**
* @var string
*
* @ORM\Column(name="description", type="text", nullable=true)
*/
private $description;
/**
* @var float
*
* @ORM\Column(name="price", type="float", precision=10, scale=0, nullable=false)
* @Assert\NotBlank
* Assert\Type(type="float", message="The value should have decimal points.")
*/
private $price;
/**
* @var \DateTime
*
* @ORM\Column(name="created_date", type="datetime", nullable=false)
*/
private $createdDate;
/**
* @var \DateTime
*
* @ORM\Column(name="modified_date", type="datetime", nullable=false)
*/
private $modifiedDate;
/**
* @var boolean
*
* @ORM\Column(name="featured", type="boolean", precision=0, scale=0, nullable=false, unique=false)
*/
private $featured;
/**
* @var \Nitin\TestBundle\Entity\ProductCategory
*
* @ORM\ManyToOne(targetEntity="Nitin\TestBundle\Entity\ProductCategory", cascade={"persist", "remove"})
* @ORM\JoinColumns({
* @ORM\JoinColumn(name="fk_product_cat", referencedColumnName="id", onDelete="CASCADE")
* })
* @Assert\NotBlank(message = "Please Select Product Category.")
*/
private $fkProductCat;
/**
* @var \Doctrine\Common\Collections\Collection
*
* @ORM\OneToMany(targetEntity="Nitin\TestBundle\Entity\ProductImages", mappedBy="fkProduct", cascade={"persist"})
*
*/
private $images;
代码产品类别实体是： -
<?php
namespace Nitin\TestBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\Validator\Constraints as Assert;
/**
* Nitin\TestBundle\Entity\ProductCategory
*
* @ORM\Table(name="product_category", indexes={@ORM\Index(name="fk_parent", columns={"fk_parent"})})
* @ORM\Entity(repositoryClass="Nitin\TestBundle\Repository\ProductCategoryRepository")
*/
class ProductCategory
{
/**
* @var integer
*
* @ORM\Column(name="id", type="integer", nullable=false)
* @ORM\Id
* @ORM\GeneratedValue(strategy="IDENTITY")
*/
private $id;
/**
* @var string
*
* @ORM\Column(name="category_name", type="string", length=250, nullable=false)
* @Assert\NotBlank
*/
private $categoryName;
/**
* @var string
*
* @ORM\Column(name="description", type="text", nullable=false)
*/
private $description;
/**
* @var \DateTime
*
* @ORM\Column(name="created_date", type="datetime", nullable=true)
*/
private $createdDate;
/**
* @var \DateTime
*
* @ORM\Column(name="modified_date", type="datetime", nullable=false)
*/
private $modifiedDate;
/**
* @var \Nitin\TestBundle\Entity\ProductCategory
*
* @ORM\ManyToOne(targetEntity="Nitin\TestBundle\Entity\ProductCategory", cascade={"persist", "remove"})
* @ORM\JoinColumns({
* @ORM\JoinColumn(name="fk_parent", referencedColumnName="id", onDelete="CASCADE")
* })
*/
private $fkParent;
/**
* @var \Doctrine\Common\Collections\Collection
*
* @ORM\OneToMany(targetEntity="Nitin\TestBundle\Entity\ProductCategory", mappedBy="fkParent", cascade={"persist"})
*/
private $child;
代码产品图片实体是
<?php
namespace Nitin\TestBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\HttpFoundation\File\UploadedFile;
use Symfony\Component\Validator\Constraints as Assert;
/**
* ProductImages
*
* @ORM\Table(name="product_images", indexes={@ORM\Index(name="fk_product", columns={"fk_product"})})
* @ORM\Entity
* @ORM\HasLifecycleCallbacks
*/
class ProductImages {
/**
* @var integer
*
* @ORM\Column(name="id", type="integer", nullable=false)
* @ORM\Id
* @ORM\GeneratedValue(strategy="IDENTITY")
*/
private $id;
/**
* @var string
*
* @ORM\Column(name="title", type="string", length=255, nullable=false)
*/
private $title;
/**
* @ORM\Column(type="string", length=255, nullable=true)
*/
private $path;
/**
* @var \DateTime
*
* @ORM\Column(name="created_date", type="datetime", nullable=false)
*/
private $createdDate;
/**
* @var \DateTime
*
* @ORM\Column(name="modified_date", type="datetime", nullable=false)
*/
private $modifiedDate;
/**
* @var \Nitin\TestBundle\Entity\Product
*
* @ORM\ManyToOne(targetEntity="Nitin\TestBundle\Entity\Product", inversedBy="id", cascade={"merge", "remove"})
* @ORM\JoinColumns({
* @ORM\JoinColumn(name="fk_product", referencedColumnName="id", onDelete="CASCADE")
* })
*/
private $fkProduct;
/**
* @Assert\File(maxSize="6000000")
*/
private $file;
为了获得结果，我通过存储库中的自定义函数使用Doctrine查询生成器： -
<?php
namespace Nitin\TestBundle\Repository;
use Doctrine\ORM\EntityRepository;
/**
* ProductRepository
*
* This class was generated by the Doctrine ORM. Add your own custom
* repository methods below.
*/
class ProductRepository extends EntityRepository {
public function getAllProduct($offset = 0, $limit = 10, $arrayResult = true) {
$qb = $this->_em->createQueryBuilder();
$qb->select(array('p', 'pc', 'img'))
->from($this->_entityName, 'p')
->leftJoin('p.fkProductCat', 'pc')
->leftJoin('p.images', 'img')
//->add('where ', $qb->expr()->countDistinct('p.id'))
;
//Pagination logic
$from = (int) $offset;
$start = ($from == 1) ? ($from - 1) : (($from - 1) * $limit);
$start = ($start < 0) ? 0 : $start;
$qb->setFirstResult($start);
$qb->setMaxResults($limit);
//echo $qb->getQuery()->getSQL();die;
if (TRUE === $arrayResult) {
return $qb->getQuery()->getArrayResult();
}
return $qb->getQuery()->getResult();
}
，并呼吁在控制器这样的功能： -
<?php
namespace Nitin\TestBundle\Controller;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
class IndexController extends Controller
{
private $data = array();
public function indexAction()
{
$em = $this->getDoctrine()->getEntityManager();
$this->data['latestProduct'] = $em->getRepository('BitcoinAdminBundle:Product')->getAllProduct(0, 8);
return $this->render('BitcoinSiteBundle:Default:index.html.twig', $this->data);
}
}
我期待着6条，但只获得了3。当我尝试打印SQL和运行在我的分贝该查询，我发现查询返回重复记录。
所以，任何人都可以提出我犯了错误的地方。
感谢
答
尝试setMaxResults();之后加入return $paginator = new Paginator($qb->getQuery, $fetchJoinCollection = true);。加入收藏时，这是一个常见问题。