php – 需要帮助从ManyToOne获取OneToMany关联

我有一个页面,列出所有’产品’以及他们尊重的ID,价格和名称.在同一页面上,我想获得我为每个人创建的描述.描述是它自己的实体,并拥有自己的控制器.

在我的ProductController中,在我的indexAction中,我试图让描述出现在这里.

问题是,我没有在indexAction中引用id(我使用findAll).我试图使用$key循环遍历所有产品和引用,但我要么在描述中输入最新描述,要么：

错误：在非对象上调用成员函数getDescriptions().

编辑：我应该提到$prodEnt为null …

我不想来这里寻求帮助,但我对如何获得我想要的东西没有更多的想法.

这是带有indexAction的ProductController：

namespace PasShopTestBundleController;

use SymfonyComponentHttpFoundationRequest;
use SymfonyBundleFrameworkBundleControllerController;
use SensioBundleFrameworkExtraBundleConfigurationMethod;
use SensioBundleFrameworkExtraBundleConfigurationRoute;
use SensioBundleFrameworkExtraBundleConfigurationTemplate;
use PasShopTestBundleEntityProduct;
use PasShopTestBundleFormProductType;

/**
 * Product controller.
 *
 * @Route("/product")
 */
class ProductController extends Controller
{
    /**
     * Lists all Product entities.
     *
     * @Route("/",name="product")
     * @Method("GET")
     * @Template()
     */
    public function indexAction()
    {
        $em = $this->getDoctrine()->getManager();

        $entities = $em->getRepository('PasShopTestBundle:Product')->findAll();

        //$entities = $em->getRepository('PasShopTestBundle:Product')->find($id);
        //var_dump($entities);
        //dump($entities); die;

        if (!$entities) {
            throw $this->createNotFoundException('Error Nothing in Entities.');
        } 
        else {
            //dump($entities); die;
            foreach ($entities as $key => $entity) {
                //dump($entities); die;
                //dump($entity); die;
                //dump($key); die; //needs to be 1
                //$entity = $em->getRepository('PasShopTestBundle:Product')->findAll($key);
                $prodEnt = $em->getRepository('PasShopTestBundle:Product')->find($key);
                //dump($entity); die;
                //dump($prodEnt); die;
                $descriptions = $prodEnt->getDescriptions();
                //dump($entity); die;
            }
            //dump($entities); die;
        }

        return array(
            'descriptions' => $descriptions,'entities' => $entities,'entity' => $entity,);
    }

这是indexActions Route twig文件：

{% extends '::base.html.twig' %}

{% block body -%}
    <h1>Product List</h1>

    <table class="records_list">
        <thead>
            <tr>
                <th>Id</th>
                <th>Name</th>
                <th>Price</th>
                <th>Quantity</th>
                <th>Description</th>
                <th>Actions</th>
            </tr>
        </thead>
        <tbody>
        {% for entity in entities %}
            <tr>
                <td><a href="{{ path('product_show',{ 'id': entity.id }) }}">{{ entity.id }}</a></td>
                <td>{{ entity.name }}</td>
                <td>{{ entity.price }}</td>
                <td>{{ entity.quantity }}</td>

                {% for key,entity in descriptions %}

                    <pre>{{ dump(entity) }}</pre>

                   {# <pre>{{ dump(key) }}</pre> #}

                        <td>{{ entity.productDesciption }}</td>

                    <pre>{{ dump(entity.productDesciption) }}</pre>

                {% endfor %}

                <td>
                    <ul>
                        <li>
                            <a href="{{ path('product_cart',{ 'id': entity.id }) }}">Add Product To Cart</a>
                        </li>
                        <li>
                            <a href="{{ path('product_show',{ 'id': entity.id }) }}">show</a>
                        </li>
                        <li>
                            <a href="{{ path('product_edit',{ 'id': entity.id }) }}">edit</a>
                        </li>
                    </ul>
                </td>
            </tr>
        {% endfor %}
        </tbody>
    </table>

        <ul>
        <li>
            <a href="{{ path('product_new') }}">
                Create a new entry
            </a>
        </li>
    </ul>
    {% endblock %}

产品实体：

namespace PasShopTestBundleEntity;

use DoctrineORMMapping as ORM;
use DoctrineCommonCollectionsArrayCollection;

/**
 * Product
 *
 * @ORMTable(name="products")
 * @ORMEntity(repositoryClass="PasShopTestBundleEntityProductRepository")
 */
class Product
{
    /**
     * @var ArrayCollection
     *
     * @ORMOneToMany(targetEntity="Description",mappedBy="product")
     */
    private $descriptions;

描述实体：

namespace PasShopTestBundleEntity;

use DoctrineORMMapping as ORM;
use DoctrineCommonCollectionArrayCollection;

/**
 * Description
 *
 * @ORMTable(name="descriptions")
 * @ORMEntity(repositoryClass="PasShopTestBundleEntityDescriptionRepository")
 */
class Description
{
    /**
     * @var string
     *
     * @ORMColumn(name="name",type="string")
     */
    private $productDescription;

    /**
     * @var Product
     *
     * @ORMManyToOne(targetEntity="Product",inversedBy="descriptions")
     * @ORMJoinColumn(name="product_id",referencedColumnName="id")
     */
    private $product;

非常感谢任何帮助,谢谢！