向zend表单字段集项添加顺序值

我有一个带有图像集合的产品实体。现在我要给图像排序。

我想通过拖放表单中的图像顺序来做到这一点。每个图片都有自己的名字，比如name="product['images][][url].

在简单的php中，我可以在提交后循环遍历post并将索引值设置为订单字段。但我怎么能用一个被教条浸渍的Zend形式做到这一点呢?

图像实体

<?php
/**
 * BjyAuthorize Module (https://github.com/bjyoungblood/BjyAuthorize)
 *
 * @link https://github.com/bjyoungblood/BjyAuthorize for the canonical source repository
 * @license http://framework.zend.com/license/new-bsd New BSD License
 */
namespace ApplicationShared'Entity;
use Doctrine'ORM'Mapping as ORM;
/**
 * An example entity that represents a image.
 *
 * @ORM'Entity
 * @ORM'Table(name="image")
 *
 * @author Tom Oram <tom@scl.co.uk>
 */
class Image
{
    /**
     * @var int
     * @ORM'Id
     * @ORM'Column(type="integer")
     * @ORM'GeneratedValue(strategy="AUTO")
     */
    protected $id;
    /**
     * @var string
     * @ORM'Column(type="string", name="url", length=255, unique=true, nullable=true)
     */
    protected $url;
    /**
     * @var int
     * @ORM'Column(type="integer", unique=false, nullable=false)
     */
    protected $order;  
    /**
     * @ORM'ManyToOne(targetEntity="ApplicationShared'Entity'Product", inversedBy="images")
     * @ORM'JoinColumn(name="product_id", referencedColumnName="id", nullable=true, onDelete="CASCADE")
     */
    protected $product;

    /**
     * Get the id.
     *
     * @return int
     */
    public function getId()
    {
        return $this->id;
    }
    /**
     * Set the id.
     *
     * @param int $id
     *
     * @return void
     */
    public function setId($id)
    {
        $this->id = (int)$id;
    }
    /**
     * Get the url.
     *
     * @return string
     */
    public function getUrl()
    {
        return $this->url;
    }
     /**
     * Set the store id.
     *
     * @param string $url
     *
     * @return void
     */
    public function setUrl($url)
    {
        $this->url = (string) $url;
    }
    /**
     * Allow null to remove association
     *
     * @param Product $product
     */
    public function setProduct(Product $product = null)
    {
        $this->product = $product;
    }
    /**
     * Get product.
     *
     * @return array
     */
    public function getProduct()
    {
        return $this->product;
    }
    /**
     * Get the order.
     *
     * @return integer
     */
    public function getOrder()
    {
        return $this->order;
    }
    /**
     * Set the order.
     *
     * @param int $order
     *
     * @return void
     */
    public function setOrder($order)
    {
        $this->order = (int) $order;
    }
}

<?php
namespace ApplicationShared'Entity;
use Doctrine'Common'Collections'ArrayCollection;
use Doctrine'Common'Collections'Collection;
use Doctrine'ORM'Mapping as ORM;
use ApplicationShared'Entity'ProductInterface;

/**
 *
 * @ORM'Entity
 * @ORM'Table(name="product")
 * @ORM'Entity(repositoryClass="ApplicationShared'Repositories'ProductRepository")
 *
 */
class Product implements ProductInterface
{
    ...
    /**
     * @ORM'OneToMany(targetEntity="ApplicationShared'Entity'Image", mappedBy="product", cascade={"all"},orphanRemoval=true)
     * )
     */
    protected $images;
    /**
     * Initialies the roles variable.
     */
    public function __construct()
    {
        $this->images = new ArrayCollection();
    }
    ...
    /**
     * Get images.
     *
     * @return array
     */
    public function getImages()
    {
        return $this->images;
    }
    /**
     * Add a image to the product.
     *
     * @param Images
     *
     * @return void
     */
    public function addImages(Collection $images)
    {
        foreach ($images as $image) {
            $image->setProduct($this);
            $this->images->add($image);
        }
    }
    /**
     * @param Collection $images
     */
    public function removeImages(Collection $images)
    {
        foreach ($images as $image) {
            $image->setProduct(null);
            $this->images->removeElement($image);
        }
    }
}

我的产品表格

<?php
namespace Backend'Form;
use ApplicationShared'Entity'Product;
use Doctrine'Common'Persistence'ObjectManager;
use DoctrineModule'Stdlib'Hydrator'DoctrineObject as DoctrineHydrator;
use Zend'Form'Fieldset;
use Zend'InputFilter'InputFilterProviderInterface;

 class ProductFieldset extends Fieldset implements InputFilterProviderInterface
 {
    public function __construct(ObjectManager $objectManager, $userid, $storeid)
    {
         parent::__construct('product');
         $this->setHydrator(new DoctrineHydrator($objectManager))
             ->setObject(new Product());

        $imagesFieldset = new ImageFieldset($objectManager);
        $this->add(array(
             'type' => 'Zend'Form'Element'Collection',
                'name' => 'images',
                'options' => array(
                    'count' => 0,
                    'target_element' => $imagesFieldset
                )
         ));
     }
 }

图片自定义字段

namespace Backend'Form;
use ApplicationShared'Entity'Image;
use Doctrine'Common'Persistence'ObjectManager;
use DoctrineModule'Stdlib'Hydrator'DoctrineObject as DoctrineHydrator;
use Zend'Form'Fieldset;
use Zend'InputFilter'InputFilterProviderInterface;

 class ImageFieldset extends Fieldset implements InputFilterProviderInterface
 {
    public function __construct(ObjectManager $objectManager)
    {
         parent::__construct('image');
         $this->setHydrator(new DoctrineHydrator($objectManager))
             ->setObject(new Image());
         $this->add(array(
            'type' => 'Zend'Form'Element'Hidden',
            'name' => 'id',
            'attributes' => array(
                'class'=>'imageId'
            )
        ));
         $this->add(array(
            'type' => 'Zend'Form'Element'Hidden',
            'name' => 'order'
        ));
         $this->add(array(
             'name' => 'url',
                'type' => 'hidden',
                'attributes' => array(
                    'required' => 'required'
                )
         ));
     }
     /**
      * @return array
      */
     public function getInputFilterSpecification()
     {
         return array(
             'id' => array(
                'required' => false
            ),
             'url' => array(
                 'required' => true,
             ),
         );
     }
 }