php – Symfony2 ManytoMany双向关系 – 如何手动持久化

我正在处理一个包含2个输入字段和一个提交按钮的表单.第一个字段是简单的下拉列表(类别),但另一个字段是标签输入字段(标签),您可以一次输入多个标签.两个字段仅接受预定义的输入选项.

类别选项值在javascript中是硬编码的：

categories = [
                        {"id": 1,"categoryname": "standard"},{"id": 2,"categoryname": "premium"},{"id": 3,"categoryname": "gold"}
                    ];

标记的选项是从数据库中的标记表中获取的.以下是数据库表的屏幕截图：

Category和Tag实体与Doctrine的ManytoMany双向关系相关联,类别是拥有方.

注意：我没有使用Symfony formType来创建表单,而是我使用了javascript.

javascript工作正常,我在控制器中获取输入数据.问题是我从未手动持有ManytoMany关系.
读过文档但不确定我是否遗漏了任何内容.

这是Tag实体(Tag.php)：

<?php

namespace AppBundleEntity;

use DoctrineCommonCollectionsArrayCollection;
use DoctrineORMMapping as ORM;
use AppBundleEntityCategory;

/**
 * Tag
 *
 * @ORMTable(name="tag")
 * @ORMEntity(repositoryClass="AppBundleRepositoryTagRepository")
 */
class Tag {

    /**
     * @var int
     *
     * @ORMColumn(name="Id",type="integer")
     * @ORMId
     * @ORMGeneratedValue(strategy="AUTO")
     */
    protected $id;

    /**
     * 
     * @var string
     *
     * @ORMColumn(name="TagName",type="string")
     */
    protected $tagname;

    /**
     * @ORMManyToMany(targetEntity="Category",mappedBy="tags")
     */
    protected $categories;

    /**
     * @return ArrayCollection 
     */
    public function __construct() {
        $this->categories = new ArrayCollection();
    }

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


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

    /**
     * Set tagname
     *
     * @param string $tagname
     * @return Tag
     */
    public function setTagname($tagname)
    {
        $this->tagname = $tagname;

        return $this;
    }

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

    /**
     * Add categories
     *
     * @param AppBundleEntityCategory $categories
     * @return Tag
     */
    public function addCategory(AppBundleEntityCategory $categories)
    {
        $this->categories[] = $categories;

        return $this;
    }

    /**
     * Remove categories
     *
     * @param AppBundleEntityCategory $categories
     */
    public function removeCategory(AppBundleEntityCategory $categories)
    {
        $this->categories->removeElement($categories);
    }

    /**
     * Get categories
     *
     * @return DoctrineCommonCollectionsCollection 
     */
    public function getCategories()
    {
        return $this->categories;
    }
}

这是Category实体(Category.php)：

<?php

namespace AppBundleEntity;

use DoctrineCommonCollectionsArrayCollection;
use DoctrineORMMapping as ORM;
use AppBundleEntityTag;

/**
 * Category
 *
 * @ORMTable(name="category")
 * @ORMEntity(repositoryClass="AppBundleRepositoryCategoryRepository")
 */
class Category {

    /**
     * @var int
     *
     * @ORMColumn(name="Id",type="integer")
     * @ORMId
     * @ORMGeneratedValue(strategy="AUTO")
     */
    protected $id;

    /**
     * 
     * @var string
     *
     * @ORMColumn(name="CategoryName",type="string")
     */
    protected $categoryname;

    /**
     * 
     * @var string
     *
     * @ORMColumn(name="Description",type="string")
     */
    protected $description;

    /**
     * @ORMManyToMany(targetEntity="Tag",cascade={"persist"},inversedBy="categories")
     */
    protected $tags;

    /**
     * @return ArrayCollection 
     */
    public function __construct() {
        $this->tags = new ArrayCollection();
    }

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

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

    /**
     * Set categoryname
     *
     * @param string $categoryname
     * @return Category
     */
    public function setCategoryname($categoryname) {
        $this->categoryname = $categoryname;

        return $this;
    }

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

    /**
     * Set description
     *
     * @param string $description
     * @return Category
     */
    public function setDescription($description) {
        $this->description = $description;

        return $this;
    }

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

    /**
     * Add tags
     *
     * @param AppBundleEntityTag $tags
     * @return Category
     */
    public function addTag(AppBundleEntityTag $tags) {
        $this->tags[] = $tags;

        return $this;
    }

    /**
     * Remove tags
     *
     * @param AppBundleEntityTag $tags
     */
    public function removeTag(AppBundleEntityTag $tags) {
        $this->tags->removeElement($tags);
    }

    /**
     * Get tags
     *
     * @return DoctrineCommonCollectionsCollection 
     */
    public function getTags() {
        return $this->tags;
    }

}

这是控制器(DefaultController.php)：

/**
 * @Route("/formsubmit",options={"expose"=true},name="my_route_to_submit")
 */
public function submitAction(Request $request) {
    $jsonString = file_get_contents('php://input');
    $form_data = json_decode($jsonString,true);

    $em = $this->getDoctrine()->getManager();

    // set category details
    $categoryId = $form_data[0]['id'];
    $category = $em->getRepository('AppBundle:Category')->findOneById($categoryId);

    // set tags
    $len = count($form_data[1]);

    for ($i = 0; $i < $len; $i++) {
        $tagId = $form_data[1][$i]['id'];
        $tag = $em->getRepository('AppBundle:Tag')->findOneById($tagId);
        $category->addTag($tag);
    }

    // persist/save in database
    $em->persist($category);
    $em->flush();
}

$form_data是一个带有输入类别和添加标签详细信息的数组.它看起来像这样：

$form_data = [
            ['id' => 3,'categoryname' => 'gold'],[
                ['id' => 1,'tagname' => 'wifi'],['id' => 4,'tagname' => 'geyser'],['id' => 2,'tagname' => 'cable']
            ]
        ];

它仍然没有坚持下去. var_dump($category);显示具有类别id和categoryname的所选类别对象,但关联的tags属性为空.

以下是输出的屏幕截图：

有任何想法吗？

旁边的快速问题：我是否需要在这里的关系定义的两侧添加cascade = {“persist”}？

编辑：在这里,我已经硬编码$form_data而不是像上面那样使用输入数据. DefaultController.php：

/**
     * @Route("/formsubmit",name="my_route_to_submit")
     */
    public function submitAction(Request $request) {
        $form_data = [
            ['id' => 3,'tagname' => 'cable']
            ]
        ];

        $em = $this->getDoctrine()->getManager();

        // set category details
        $categoryId = $form_data[0]['id'];
        $category = $em->getRepository('AppBundle:Category')->findOneById($categoryId);

        // set tags
        $len = count($form_data[1]);

        for ($i = 0; $i < $len; $i++) {
            $tagId = $form_data[1][$i]['id'];
            $tag = $em->getRepository('AppBundle:Tag')->findOneById($tagId);
//            $tag->addCategory($category);
            $category->addTag($tag);
        }
        var_dump($category);
        exit;

        // persist/save in database
        $em->persist($category);
        $em->flush();
    }

控制器输出：

如您所见,类别对象的tags属性仍为空.

希望这有助于更好地理解这个问题.
等待回复……

$tag = $em->getRepository('AppBundle:Tag')->findOneById($tagId);

$category->addTag($tag[0]);