使用KnpPaginatorBundle对连接表进行排序

Question

我设置了一个测试来更熟悉Symfony2和KnpPaginatorBundle.我有宠物的表引用宠物动物类型(Dog,Cat等).我可以按id,排序name,但当我尝试按动物排序时,type我收到一条错误消息,说明:

在给定的Query组件中没有这样的字段[animalkind],由[a]别名

我尝试了各种字段名称,但似乎没有任何效果.

实体: MyPets.php

<?php
namespace Xyz\TestBundle\Entity;
use Doctrine\ORM\Mapping as ORM;

/**
 * MyPet
 */

class MyPet
{
    /**
     * @var integer
     */
    private $id;

    /**
     * @var string
     */
    private $name;

    /**
     * Set id
     *
     * @param integer $id
     * @return MyPet
     */
    public function setId($id)
    {
        $this->id = $id;
        return $this;
    }

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

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

    /**
     * Get name
     *
     * @return string 
     */
    public function getName()
    {
        return $this->name;
    }
    /**
     * @var \Xyz\TestBundle\Entity\AnimalKind
     */
    private $AnimalKind;

    /**
     * Set AnimalKind
     *
     * @param \Xyz\TestBundle\Entity\AnimalKind $animalKind
     * @return MyPet
     */
    public function setAnimalKind(\Xyz\TestBundle\Entity\AnimalKind $animalKind)
    {
        $this->AnimalKind = $animalKind;
        return $this;
    }

    /**
     * Get AnimalKind
     *
     * @return \Xyz\TestBundle\Entity\AnimalKind 
     */
    public function getAnimalKind()
    {
        return $this->AnimalKind;

    }
}

实体: AnimalKind.php

<?php
namespace Xyz\TestBundle\Entity;
use Doctrine\ORM\Mapping as ORM;

/**
 * AnimalKind
 */
class AnimalKind {

    /**
     * @var integer
     */
    private $id;

    /**
     * @var string
     */
    private $type;

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

    /**
     * Set type
     *
     * @param string $type
     * @return AnimalKind
     */
    public function setType($type) {
        $this->type = $type;

        return $this;
    }

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

    /**
     * @var \Doctrine\Common\Collections\Collection
     */
    private $MyPets;

    /**
     * Constructor
     */
    public function __construct() {
        $this->MyPets = new \Doctrine\Common\Collections\ArrayCollection();
    }

    /**
     * Add MyPets
     *
     * @param \Xyz\TestBundle\Entity\MyPet $myPets
     * @return AnimalKind
     */
    public function addMyPet(\Xyz\TestBundle\Entity\MyPet $myPets) {
        $this->MyPets[] = $myPets;

        return $this;
    }

    /**
     * Remove MyPets
     *
     * @param \Xyz\TestBundle\Entity\MyPet $myPets
     */
    public function removeMyPet(\Xyz\TestBundle\Entity\MyPet $myPets) {
        $this->MyPets->removeElement($myPets);
    }

    /**
     * Get MyPets
     *
     * @return \Doctrine\Common\Collections\Collection 
     */
    public function getMyPets() {
        return $this->MyPets;
    }

    public function __toString() {
        return $this->getType();
    }

}

控制器:MyPetController.php(IndexAction)

    public function indexAction()
    {
        $em = $this->getDoctrine()->getManager();

        $query = $em->createQuery("SELECT a FROM XyzTestBundle:MyPet a");

        $paginator  = $this->get('knp_paginator');

        $pagination = $paginator->paginate($query,$this->get('request')->query->get('page', 
          1)/*page number*/,15/*limit per page*/);

        return $this->render('XyzTestBundle:MyPet:index.html.twig', array(
         'pagination' => $pagination,

        ));
    }

查看:( MyPet/index.html.twig剪掉)

<table class="records_list">
    <thead>
        <tr>
            {# sorting of properties based on query components #}
            <th>{{ knp_pagination_sortable(pagination, 'Id', 'a.id') }}</th>
            <th>{{ knp_pagination_sortable(pagination, 'Name', 'a.name') }}</th>
            <th>{{ knp_pagination_sortable(pagination, 'kind', 'a.animalkind') }}</th>
        </tr>
    </thead>
    <tbody>
    {% for mypet in pagination %}
        <tr>
            <td><a href="{{ path('xyz_mypet_show', { 'id': mypet.id }) }}">{{ mypet.id }}</a></td>
            <td>{{ mypet.name }}</td>
            <td>{{ mypet.animalkind }}</td>
        </tr>
    {% endfor %}
    </tbody>
</table>

任何人都可以给我任何关于这个问题的见解吗？

Answer 1

第一个问题是缺少ORM关系声明; 基本上在你的DB YourPet中无法关联到AnimalKind.

您可以在Symfony的网站上找到有关实体关系和关联的文档.

从YourPet实体的角度来看,您可能希望使用ManyToOne关系.

第二个问题,一旦解决了上述问题,就是您没有加入AnimalKind查询中的实体.

第三个问题是您无法按实体订购查询结果.

首发潜在解决方案:

// In MyPet class
/**
 * @var \Xyz\TestBundle\Entity\AnimalKind
 * @ORM\OneToMany(targetEntity="AnimalKind", inversedBy="MyPets")
 */
private $AnimalKind;

// In AnimalKind class
/**
 * @var \Doctrine\Common\Collections\Collection
 * @ORM\ManyToOne(targetEntity="MyPet", inversedBy="AnimalKind")
 */
private $MyPets;

第二期潜在解决方案:

$query = $em->createQuery("
    SELECT a, k
    FROM XyzTestBundle:MyPet a
    JOIN a.animalKind k 
");

第三期潜在解决方案:

<th>{{ knp_pagination_sortable(pagination, 'kind', 'k.type') }}</th>