Symfony2 Doctrine ManyToMany不持久

Question

嘿伙计们，我又在寻求帮助了。

我的问题是两个相关的ORM实体没有被存储。

我运行以下单元测试，但它失败了：

public function testCategoryRelation()
{
    $doctrine = $this->client->getContainer()->get('doctrine');
    $itemRepo = $doctrine->getRepository("AppBundle:Item");
    $item = $itemRepo->find(230045);
    $this->assertTrue($item instanceof AcmeTestBundleEntityItem);
    $categories = $item->getCategories();
    $this->assertGreaterThan(0, $categories->count());
    foreach ($categories as $category) {
        $this->assertTrue($category instanceof AcmeTestBundleEntityCategory);
    }
    $count = $categories->count();
    $categoryRepo = $doctrine->getRepository("AppBundle:Category");
    $categories = $categoryRepo->findBy(array(), null, 2);
    $this->assertEquals( 2, count($categories) );
    foreach ($categories as $category) {
        $this->assertTrue($category instanceof AcmeTestBundleEntityCategory);
        $category->addItem($item);
        $item->addCategory($category);
    }
    $this->assertGreaterThan($count, $item->getCategories()->count());
    $em = $doctrine->getManager();
    foreach ($categories as $category) {
        $em->persist($category);
    }
    $em->persist($item);
    $em->flush();
    $em->clear($item);
    $item = $itemRepo->find(230045);
    $categories = $item->getRelatedItems();
    $this->assertGreaterThan($count, $categories->count()); /* Here it fails */
}

我不知道为什么上次测试失败了。你能帮我找到我的错误吗？

我运行Symfony 2.1.4和Doctrine 2.3

我有两个ORM对象。

1. 项目

namespace AcmeTestBundleEntity;
use DoctrineORMMapping as ORM;
/**
 * @ORMTable(name="item")
 */
class Item
{
  /**
   * @ORMManyToMany(targetEntity="Category", mappedBy="items")
   */
  private $categories;
  public function __construct()
  {
      $this->categories = new DoctrineCommonCollectionsArrayCollection();
  }
  /**
   * @param AcmeTestBundleEntityCategory $category
   */
  public function addCategory(AcmeTestBundleEntityCategory $category)
  {
      $this->categories[] = $category;
      return $this;
  }
  /**
   * @return DoctrineCommonCollectionsCollection
   */
  public function getCategories()
  {
      return $this->categories;
  }
}

2. 类别

namespace AcmeTestBundleEntity;
use DoctrineORMMapping as ORM;
/**
 * @ORMTable(name="category")
 * @ORMEntity(repositoryClass="AcmeTestBundleRepositoryCategoryRepository")
 */
class Category
{
  /**
   * @var DoctrineCommonCollectionsArrayCollection
   *
   * @ORMManyToMany(targetEntity="Item", inversedBy="categories")
   * @ORMJoinTable(name="category_item",
   *   joinColumns={
   *     @ORMJoinColumn(name="cat_id", referencedColumnName="id")
   *   },
   *   inverseJoinColumns={
   *     @ORMJoinColumn(name="item_id", referencedColumnName="id")
   *   }
   * )
   */
  private $items;
  /**
   * @param AcmeTestBundleEntityItem $item
   * @return Category
   */
  public function addItem(AcmeTestBundleEntityItem $item)
  {
      $this->items[] = $item;
      return $this;
  }
  /**
   * @return DoctrineCommonCollectionsCollection
   */
  public function getItems()
  {
      return $this->items;
  }
}

提前感谢您的帮助！

Answer 1

嗯，$categories = $item->getRelatedItems(); .也许写$categories = $item->getCategories();更好？

另一个建议是将__construct方法添加到类别实体类并使用new ArrayCollection初始化$items