Php Zend 2&x2B；实体请求原则_Php_Zend Framework2_Doctrine

Php Zend 2&x2B；实体请求原则

php zend-framework2 doctrine

Php Zend 2&x2B；实体请求原则,php,zend-framework2,doctrine,Php,Zend Framework2,Doctrine,我在使用教义方面有困难。当我尝试获取特定实体时，无法检索结果。我有这些实体： <?php namespace TDS\Entity; use Doctrine\ORM\Mapping as ORM; /** * Courses * * @ORM\Table(name="courses") * @ORM\Entity */ class Courses { /** * @var integer * * @ORM\Column(name="

我在使用教义方面有困难。当我尝试获取特定实体时，无法检索结果。我有这些实体：

<?php

namespace TDS\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * Courses
 *
 * @ORM\Table(name="courses")
 * @ORM\Entity
 */
class Courses
{
    /**
     * @var integer
     *
     * @ORM\Column(name="id", type="integer", nullable=false)
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="IDENTITY")
     */
    private $id;

    /**
     * @var string
     *
     * @ORM\Column(name="name", type="string", length=64, nullable=false)
     */
    private $name;



    /**
     * Get id
     *
     * @return integer
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * Set name
     *
     * @param string $name
     *
     * @return Courses
     */
    public function setName($name)
    {
        $this->name = $name;

        return $this;
    }

    /**
     * Get name
     *
     * @return string
     */
    public function getName()
    {
        return $this->name;
    }
}

以下是我提出请求的方式：

$qb = $this->getEm()->createQueryBuilder();
$qb->select('clp')->from('TDS\Entity\CoursesLevelsPlaces', 'clp');
$list = $qb->getQuery()->getResult();

问题是我无法检索我的实体。例如，如果我对课程提出请求，结果将正确显示。每个CoursesLevelsPlaces行都是唯一的，并且与其他实体具有一对一的关系

作为参考，我从数据库模式中生成了这些实体（反向原则）

你知道我为什么会得到这个结果吗？

谢谢

您不应该

打印\u r

或

var\u dump

完整的原则2实体，因为所有元数据等也将被打印。这将导致内存问题，并且输出将对您的浏览器显示太多

你有几个选择

只需遍历结果并使用getter检索数据

foreach ($list as $entity) {
    echo $entity->getId() . PHP_EOL;
}

使用原则中的调试util

foreach ($list as $entity) {
    Doctrine\Common\Util\Debug::dump($entity);
}

使用调试器（xdebug）并在IDE中放置断点，然后观察实体内容

谢谢，就这样。我没有想到这一点。

<?php

namespace TDS\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * CoursesLevelsPlaces
 *
 * @ORM\Table(name="courses_levels_places", uniqueConstraints={@ORM\UniqueConstraint(name="id_course", columns={"id_course", "id_level", "id_place", "id_time_slot"})}, indexes={@ORM\Index(name="courses", columns={"id_course"}), @ORM\Index(name="levels", columns={"id_level"}), @ORM\Index(name="places", columns={"id_place"}), @ORM\Index(name="time_slot", columns={"id_time_slot"})})
 * @ORM\Entity
 */
class CoursesLevelsPlaces
{
    /**
     * @var integer
     *
     * @ORM\Column(name="id", type="integer", nullable=false)
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="IDENTITY")
     */
    private $id;

    /**
     * @var \TDS\Entity\Courses
     *
     * @ORM\ManyToOne(targetEntity="TDS\Entity\Courses")
     * @ORM\JoinColumns({
     *   @ORM\JoinColumn(name="id_course", referencedColumnName="id")
     * })
     */
    private $idCourse;

    /**
     * @var \TDS\Entity\Levels
     *
     * @ORM\ManyToOne(targetEntity="TDS\Entity\Levels")
     * @ORM\JoinColumns({
     *   @ORM\JoinColumn(name="id_level", referencedColumnName="id")
     * })
     */
    private $idLevel;

    /**
     * @var \TDS\Entity\Places
     *
     * @ORM\ManyToOne(targetEntity="TDS\Entity\Places")
     * @ORM\JoinColumns({
     *   @ORM\JoinColumn(name="id_place", referencedColumnName="id")
     * })
     */
    private $idPlace;

    /**
     * @var \TDS\Entity\TimeSlot
     *
     * @ORM\ManyToOne(targetEntity="TDS\Entity\TimeSlot")
     * @ORM\JoinColumns({
     *   @ORM\JoinColumn(name="id_time_slot", referencedColumnName="id")
     * })
     */
    private $idTimeSlot;



    /**
     * Get id
     *
     * @return integer
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * Set idCourse
     *
     * @param \TDS\Entity\Courses $idCourse
     *
     * @return CoursesLevelsPlaces
     */
    public function setIdCourse(\TDS\Entity\Courses $idCourse = null)
    {
        $this->idCourse = $idCourse;

        return $this;
    }

    /**
     * Get idCourse
     *
     * @return \TDS\Entity\Courses
     */
    public function getIdCourse()
    {
        return $this->idCourse;
    }

    /**
     * Set idLevel
     *
     * @param \TDS\Entity\Levels $idLevel
     *
     * @return CoursesLevelsPlaces
     */
    public function setIdLevel(\TDS\Entity\Levels $idLevel = null)
    {
        $this->idLevel = $idLevel;

        return $this;
    }

    /**
     * Get idLevel
     *
     * @return \TDS\Entity\Levels
     */
    public function getIdLevel()
    {
        return $this->idLevel;
    }

    /**
     * Set idPlace
     *
     * @param \TDS\Entity\Places $idPlace
     *
     * @return CoursesLevelsPlaces
     */
    public function setIdPlace(\TDS\Entity\Places $idPlace = null)
    {
        $this->idPlace = $idPlace;

        return $this;
    }

    /**
     * Get idPlace
     *
     * @return \TDS\Entity\Places
     */
    public function getIdPlace()
    {
        return $this->idPlace;
    }

    /**
     * Set idTimeSlot
     *
     * @param \TDS\Entity\TimeSlot $idTimeSlot
     *
     * @return CoursesLevelsPlaces
     */
    public function setIdTimeSlot(\TDS\Entity\TimeSlot $idTimeSlot = null)
    {
        $this->idTimeSlot = $idTimeSlot;

        return $this;
    }

    /**
     * Get idTimeSlot
     *
     * @return \TDS\Entity\TimeSlot
     */
    public function getIdTimeSlot()
    {
        return $this->idTimeSlot;
    }
}

$qb = $this->getEm()->createQueryBuilder();
$qb->select('clp')->from('TDS\Entity\CoursesLevelsPlaces', 'clp');
$list = $qb->getQuery()->getResult();

foreach ($list as $entity) {
    echo $entity->getId() . PHP_EOL;
}

foreach ($list as $entity) {
    Doctrine\Common\Util\Debug::dump($entity);
}