多对多插入原则

问题描述

我有一些问题.我正在研究并尝试所有建议但没有一个工作.

i have some promblem. i was research and try all suggest but no one work.

我最终得到:

传递给 EntityUser::addCategories() 的参数 1 必须是 EntityCategory 的实例，给定字符串，

我有很多关系，用户、用户类别和类别

i have manytomany relationship, user, user_category, and category

用户

<?php

namespace Entity;

use DoctrineCommonCollectionsArrayCollection;

use GedmoMappingAnnotation as Gedmo;
use DoctrineORMMapping as ORM;

/**
 * @Entity
 * @Table(name="user")
 */
class User
{

    /**
     * @Id
     * @Column(type="integer", nullable=false)
     * @GeneratedValue(strategy="AUTO")
     */
    public $id;

    /**
     * @Column(type="string", length=255, unique=true, nullable=false)
     */
    public $name;


    /**
     * @ManyToMany(targetEntity="EntityCategory", inversedBy="user")
     * @ORMJoinTable(name="user_category")
     */
    public $categories;

        public function __construct() {
            $this->category = new DoctrineCommonCollectionsArrayCollection();
    }

    public function getCategories()
    {
        return $this->categories;
    }

    public function addCategories(Category $category = null)
    {
        $this->categories = $category;
    }

    public function setName($name)
    {
        $this->name = $name;
    }
    public function getName()
    {
        return $this->name;
    }

}

类别

<?php

namespace Entity;

use DoctrineCommonCollectionsArrayCollection;

use GedmoMappingAnnotation as Gedmo;
use DoctrineORMMapping as ORM;

/**
 * @Entity
 * @Table(name="category")
 */
class Category
{

    /**
     * @Id
     * @Column(type="integer", nullable=false)
     * @GeneratedValue(strategy="AUTO")
     */
    public $id;

    /**
     * @Column(type="string", length=255, unique=true, nullable=false)
     */
    public $name;

    /**
     * @ManyToMany(targetEntity="EntityUser", mappedBy="category")
     */
    public $user;


    public function __construct() {
        $this->user = new DoctrineCommonCollectionsArrayCollection();
    }

    public function getUser()
    {
        return $this->user;
    }

    public function addUser(User $user = null)
    {
        $user->addCategory($this);
        $this->user = $user;
    }


    public function setName($name)
    {
        $this->name = $name;
    }
    public function getName()
    {
    return $this->name;
    }
}

插入函数

        // check existence object in database
        $res = $this->em->find('EntityUser', $this->input->post('id'));

        if($res){
            $data = $this->em->find('EntityUser', $this->input->post('id'));
        }else{
            // create a new User object
            $data = new EntityUser;                
        }


        $data->setName($this->input->post('name'));
        $data->addCategories($this->input->post('category'));


        // save the data object to the database
        $this->em->persist($data);

        $this->em->flush();

get 一切顺利，但我对开始工作感到很困惑.

Everything goes fine on get but i'm so confuse for set to work.

感谢您的帮助.对不起我的英语.

thanks for your help. sorry for my english.

推荐答案

你有很多错误(注意语法):

You have lot of errors (pay attention to grammar):

代替

public $categories;
public function __construct() {
    $this->category = new DoctrineCommonCollectionsArrayCollection();
}

应该是:

protected $categories;

public function __construct() {
    $this->categories = new DoctrineCommonCollectionsArrayCollection();
}

代替:

public $user;
public function __construct() {
    $this->user = new DoctrineCommonCollectionsArrayCollection();
}

使用

protected $users;
public function __construct() {
    $this->users = new DoctrineCommonCollectionsArrayCollection();
}

代替

public function addCategories(Category $category = null)
{
    $this->categories = $category;
}

一定是

public function addCategory(Category $category = null)
{
    $this->categories->add($category);
}

和

public function removeCategory(Category $category)
{
    $this->categories->removeElement($category) ;
}
public function setCategories($categories)
{
    $this->categories = categories;
}

双方的逻辑相同.我不知道 CI 是如何工作的，但 Symfony 会自动找到 addSomething/removeSomething 方法.即使 CI 不支持该功能，您仍应按上述方式更改代码.

Same logic on both sides. I don't know how CI works but Symfony will automatically find addSomething/removeSomething methods. Even if CI doesn't support that feature, you should still change your code as above.

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