Question

我在持久化对象时遇到错误，说我需要在ManyToMany关系中配置cascade persist选项，但它已配置。

通过这种关系找到了一个新的实体＆appBundle \ Entity \ ShopProducts＃shopProductImages＆＃39;未配置为级联实体的持久操作：AppBundle \ Entity \ ShopProductImages @ 000000007d4db89e00000000344e8db2。要解决此问题：在此未知实体上显式调用EntityManager＃persist（）或在映射中配置级联持久保存此关联，例如@ManyToOne（..，cascade = {＆＃34; persist＆＃34;}）。如果你找不到哪个实体导致问题的实现＆＃39; AppBundle \ Entity \ ShopProductImages #__ toString（）＆＃39;得到一个线索。

控制器/ ShopController.php

    $product = new ShopProducts();
    $form = $this->createForm(ProductTypeNew::class, $product);

    if ($form->isSubmitted() && $form->isValid())
    {
        $image = new ShopProductImages();
        ...
        $product->addShopProductImages($image);
        ...
        $em->persist($product);
        $em->flush();

实体/ ShopProducts.php

/**
 * @var \Doctrine\Common\Collections\Collection
 *
 * @ORM\ManyToMany(
 *     targetEntity="AppBundle\Entity\ShopProductImages",
 *     mappedBy="shopProducts",
 *     cascade={"persist"}
 * )
 */
private $shopProductImages;

/**
 * @return ArrayCollection|ShopProductImages[]
 */
public function getShopProductImages()
{
    return $this->shopProductImages;
}


public function addShopProductImages(ShopProductImages $image)
{
    if ($this->shopProductImages->contains($image)) {
        return;
    }
    $this->shopProductImages[] = $image;
    $image->addImagesProduct($this);
}

public function removeShopProductImages(ShopProductImages $image)
{
    if (!$this->shopProductImages->contains($image)) {
        return;
    }
    $this->shopProductImages->removeElement($image);
    $image->removeImagesProduct($this);
}

实体/ ShopProductImages.php

/**
 * @var \Doctrine\Common\Collections\Collection
 *
 * @ORM\ManyToMany(targetEntity="AppBundle\Entity\ShopProducts",
 *     inversedBy="shopProductImages",
 *     cascade={"persist"}
 *     )
 * @ORM\JoinTable(name="shop_product_images_has_shop_products"),
 *   joinColumns={
 *     @ORM\JoinColumn(name="shop_product_images_id", referencedColumnName="id")
 *   },
 *   inverseJoinColumns={
 *     @ORM\JoinColumn(name="shop_products_id", referencedColumnName="id")
 *   }
 */
private $shopProducts;

public function addImagesProduct(ShopProducts $product)
{
    if ($this->shopProducts->contains($product)) {
        return;
    }
    $this->shopProducts[] = $product;
    $product->addShopProductImages($this);
}

public function removeImagesProduct(ShopProducts $product)
{
    if (!$this->shopProducts->contains($product)) {
        return;
    }
    $this->shopProducts->removeElement($product);
    $product->removeShopProductImages($this);
}

窗体/类型/ ProductTypeNew.php

public function buildForm(FormBuilderInterface $builder, array $options)
{
    $builder
        ->add('name')
        ->add('price')
        ->add('description', TextareaType::class)
        ->add('quantity')
        ->add('file', FileType::class, array('label' => 'Zdjęcie'))

Answer 1

在您的控制器中，尝试在刷新前添加$em->persist($image);。

您的问题似乎是他无法创建shop_product_images_has_shop_products表的值，因为图片还没有ID，因此您必须保留$image和{{填充之前1}}实体。

此外，您的$product应仅位于图片实体实体注释中，而不应位于产品实体注释中。

Answer 2

在manyToMany上，你不需要cascade = {＆＃34; persist＆＃34;}

你有你的添加...（）和删除...（）它取代你的级联来将数据保存到中间表

在您的表单构建器中，您需要： - ＆gt;添加（＆＃39; ShopProductImages＆＃39;，＆＃39; collection＆＃39;，array（＆＃39; by_reference＆＃39; =＆gt; false，））

从注释中删除级联

Symfony3 ManyToMany关系和级联持久性。 cascade = {＆＃34; persist＆＃34;}已配置但发生错误

2 个答案: