Question

尝试嵌入一个集合类型，基本上遵循一步一步的方法here。

我收到以下错误：

The form's view data is expected to be an instance of class
AppBundle\Entity\BenefitGroup, but is an instance of class 
AppBundle\Entity\BenefitItem. You can avoid this error by setting the 
"data_class" option to null or by adding a view transformer that transforms 
an instance of class AppBundle\Entity\BenefitItem to an instance of 
AppBundle\Entity\BenefitGroup.

为了澄清，BenefitItem是父亲，而BenefitGroup是孩子。

我基本上错了this。

我还没有实现（还）允许你动态添加BenefitGroup元素的部分，我甚至没有试图保留对象或删除它（所以我还没有实现最后一部分如实例中所解释的那样的学说。

这是我的代码：

BenefitItem实体：

<?php
// src/AppBundle/Entity/BenefitItem.php

namespace AppBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Collections\ArrayCollection;

/**
 * @ORM\Entity(repositoryClass="AppBundle\Entity\BenefitItemRepository")
 * @ORM\Table(name="benefit_items")
 */
class BenefitItem
{
/**
 * @ORM\Column(type="integer")
 * @ORM\Id
 * @ORM\GeneratedValue(strategy="AUTO")
 */
protected $id;

/**
 * @ORM\Column(type="string", length=400)
 */
protected $comment;

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

public function getBenefitGroups()
{
    return $this->BenefitGroups;
}

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

/**
 * Set comment
 *
 * @param string $comment
 * @return BenefitItem
 */
public function setComment($comment)
{
    $this->comment = $comment;

    return $this;
}

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

BenefitGroup实体：

<?php
// src/AppBundle/Entity/BenefitGroup.php

namespace AppBundle\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Entity(repositoryClass="AppBundle\Entity\BenefitGroupRepository")
 * @ORM\Table(name="benefit_groups")
 */
class BenefitGroup
{
/**
 * @ORM\Column(type="integer")
 * @ORM\Id
 * @ORM\GeneratedValue(strategy="AUTO")
 */
protected $id;

/**
 * @ORM\Column(type="string", length=100)
 */
protected $name;

/**
 * @ORM\ManyToOne(targetEntity="BenefitItem", cascade={"persist"})
 * @ORM\JoinColumn(name="benefitItem_id")
 */
protected $benefitItem;


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

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

    return $this;
}

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

/**
 * Set benefitItem
 *
 * @param \AppBundle\Entity\BenefitItem $benefitItem
 * @return BenefitGroup
 */
public function setBenefitItem(\AppBundle\Entity\BenefitItem $benefitItem = null)
{
    $this->benefitItem = $benefitItem;

    return $this;
}

/**
 * Get benefitItem
 *
 * @return \AppBundle\Entity\BenefitItem 
 */
public function getBenefitItem()
{
    return $this->benefitItem;
}
}

BenefitItemFormType：

<?php

namespace AppBundle\Form\Type;

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

class BenefitItemFormType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
    $builder->add('comment');

    $builder->add('benefitgroups', 'collection', array('type' => new BenefitGroupFormType()));
}

public function setDefaultOptions(OptionsResolverInterface $resolver)
{
    $resolver->setDefaults(array(
        'data_class' => 'AppBundle\Entity\BenefitGroup',
    ));
}

public function getName()
{
    return 'BenefitItem';
}
}

BenefitGroupFormType：

<?php

namespace AppBundle\Form\Type;

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

class BenefitGroupFormType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
    $builder->add('name');
}

public function setDefaultOptions(OptionsResolverInterface $resolver)
{
    $resolver->setDefaults(array(
        'data_class' => 'AppBundle\Entity\BenefitGroup',
    ));
}

public function getName()
{
    return 'BenefitGroup';
}
}

控制器：

<?php
// AppBundle\Controller\BenefitController.php

namespace AppBundle\Controller;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use AppBundle\Entity\BenefitItem;
use AppBundle\Entity\BenefitGroup;
use AppBundle\Form\Type\BenefitItemFormType;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;

class BenefitController extends Controller
{
/**
 * @Route("/benefit/show", name="benefit_show")
 */
public function showAction(Request $request)
{
    $BI = new BenefitItem();

    $BG1 = new BenefitGroup();
    $BG1->setName = 'Name 1';
    $BI->getBenefitGroups()->add($BG1);
    $BG2 = new BenefitGroup();
    $BG2->setName = 'Name 2';
    $BI->getBenefitGroups()->add($BG2);        

    $form = $this->createForm(new BenefitItemFormType(), $BI);

    $form->handleRequest($request);

    if ($form->isValid()) {
        // ... maybe do some form processing, like saving the Task and Tag objects
    }

    return $this->render('benefit/show.html.twig', array(
        'form' => $form->createView(),
    ));
}
}

有什么想法吗？

Answer 1

您说，您的data_class是BenefitGroup

$resolver->setDefaults(array(
    'data_class' => 'AppBundle\Entity\BenefitGroup',
));

然后设置BenefitItem。

$BI = new BenefitItem();
// ...
$form = $this->createForm(new BenefitItemFormType(), $BI);

那不行。我没有检查你的其余代码，但这也是异常所说的。

在Symfony2中嵌入一个集合类型

1 个答案: