Question

我试图找到我的问题的答案但是没有成功。我使用Symfony（我已经使用了2个月），当我想要建立多对多的关系时，我遇到了问题。

我有家，我有服务。一个家庭可以提供很多服务，一个服务可以拥有很多家庭。一切都很好，我理解许多人使用该学说的方式，我在我的控制器中刷新之前坚持所有值，但我总是得到这样的信息：

An exception occurred while executing 'INSERT INTO homess_services (home_id, service_id) VALUES (?, ?)' with params [25, 7]:

SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '25' for key 'home_id'

我的代码是（家庭实体）：

<?php

namespace Filip\SymfonyBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Collections\ArrayCollection;
use Filip\SymfonyBundle\FilipSymfonyBundle;

/**
 * Home
 *
 * @ORM\Table(name="homes")
 * @ORM\Entity
 *
 *
 */
class Home
{
    /**
     * @var ArrayCollection
     *
     * @ORM\ManyToMany(targetEntity="Service", inversedBy="homes")
     * @ORM\JoinTable(name="homess_services")
     */




       protected $services;

    public function __construct()   {
            $this->photos = new ArrayCollection();
            $this->services = new ArrayCollection();
        }

/**
     * Renders a publication as a string
     *
     * @return string
     */
    public function __toString (){
        return $this->getName();
    }

/**
     * Add services
     *
     * @param \Filip\SymfonyBundle\Entity\Service $services
     * @return Home
     */
    public function addService(\Filip\SymfonyBundle\Entity\Service $services)
    {
        $this->services[] = $services;

        return $this;
    }

    /**
     * Remove services
     *
     * @param \Filip\SymfonyBundle\Entity\Service $services
     */
    public function removeService(\Filip\SymfonyBundle\Entity\Service $services)
    {
        $this->services->removeElement($services);
    }

    /**
     * Get services
     *
     * @return \Doctrine\Common\Collections\Collection 
     */
    public function getServices()
    {
        return $this->services;
    }

服务实体：

<?php

namespace Filip\SymfonyBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Filip\SymfonyBundle\FilipSymfonyBundle;

/**
 * Service
 *
 * @ORM\Table("services")
 * @ORM\Entity

 */
class Service
{


    /**
     * @var ArrayCollection
     *
     * @ORM\ManyToMany(targetEntity="Home", mappedBy="services")
     */
    protected $homes;

    /**
     * @var integer
     *
     * @ORM\Column(name="id", type="integer")
     * @ORM

\Id
 * @ORM\GeneratedValue(strategy="AUTO")
 */
private $id;

/**
 * @var string
 *
 * @ORM\Column(name="category", type="string", length=45)
 */
private $category;

/**
 * @var string
 *
 * @ORM\Column(name="name", type="string", length=45)
 */
private $name;

/**
 * Renders a service as a string
 *
 * @return string
 */




/**
 * Get id
 *
 6

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

/**
 * Set category
 *
 * @param string $category
 * @return Service
 */
public function setCategory($category)
{
    $this->category = $category;

    return $this;
}

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

/**
 * Set name
 *
 * @param string $name
 * @return Service
 */
public function setName($name)
{
    $this->name = $name;

    return $this;
}

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

public function __construct()
{
    $this->homes = new ArrayCollection();
}

/**
 * Add homes
 *
 * @param \Filip\SymfonyBundle\Entity\Home $homes
 * @return Service
 */
public function addHome(\Filip\SymfonyBundle\Entity\Home $homes)
{
    $this->homes[] = $homes;

    return $this;
}

/**
 * Remove homes
 *
 * @param \Filip\SymfonyBundle\Entity\Home $homes
 */
public function removeHome(\Filip\SymfonyBundle\Entity\Home $homes)
{
    $this->homes->removeElement($homes);
}

/**
 * Get homes
 *
 * @return \Doctrine\Common\Collections\Collection 
 */
public function getHomes()
{
    return $this->homes;
}
}

表（HomeType）：

<?php

namespace Filip\SymfonyBundle\Form;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;


class HomeType extends AbstractType
{
    /**
     * @param FormBuilderInterface $builder
     * @param array $options
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('name')
            ->add('city')
            ->add('region')
            ->add('phone')
            ->add('address')
            ->add('email')
            ->add('website')
            ->add('content')
            ->add('youtubeApi')
            ->add('premium')

            ->add('services' , 'entity' , array(
                'class'    => 'FilipSymfonyBundle:Service' ,
                'property' => 'name' ,
                'expanded' => true ,
                'multiple' => true ,
                ));
    }

    /**
     * @param OptionsResolverInterface $resolver
     */
    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => 'Filip\SymfonyBundle\Entity\Home'
        ));
    }

    /**
     * @return string
     */
    public function getName()
    {
        return 'filip_symfonybundle_home';
    }
}

家庭控制器：

/**
     * Creates a new Home entity.
     *
     * @Route("/", name="home_create")
     * @Method("POST")
     * @Template("FilipSymfonyBundle:Home:new.html.twig")
     */
    public function createAction(Request $request)
    {
        $entity = new Home();
        $form = $this->createCreateForm($entity);
        $form->handleRequest($request);

        if ($form->isValid()) {

            $em = $this->getDoctrine()->getManager();
            $services = $entity->getServices();

            foreach($services as $service) {
                $entity->addService($service);
                $em->persist($service);
            }
            $em->persist($entity);
            $em->flush();

            return $this->redirect($this->generateUrl('home_show', array('id' => $entity->getId())));
        }

        return array(
            'entity' => $entity,
            'form'   => $form->createView(),
        );
    }

    /**
     * Creates a form to create a Home entity.
     *
     * @param Home $entity The entity
     *
     * @return \Symfony\Component\Form\Form The form
     */
    private function createCreateForm(Home $entity)
    {
        $form = $this->createForm(new HomeType(), $entity, array(
            'action' => $this->generateUrl('home_create'),
            'method' => 'POST',
        ));

        $form->add('submit', 'submit', array('label' => 'Create'));

        return $form;
    }

Answer 1

在if($form->isValid())部分，您不需要在foreach循环中调用addService()方法，因为Symfony会在handleRequest()调用中为您执行此操作。如果Home实体处于ManyToMany关系的所有者，那么您也不需要持久保存每个Service对象。所以你也可以尝试删除整个foreach循环。

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1 个答案: