Forms Symfony2（2.7）表单实体数据转换器

我试图在使用实体ID时自定义选择列表的文本。这是因为我希望列表选项特定于经过身份验证的用户。数据库文本值是全名、按城市和州以及匿名，但我希望它实际显示用户的全名（John Smith）、科罗拉多州丹佛市的用户和匿名用户。我正试图使用视图数据转换器来实现这一点，但运气不好。如果可能的话，我宁愿不使用Javascript来实现这一点

以下是我的主要表单类型：

<?php

namespace Members\MessagesBundle\Form;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;
use Symfony\Component\Security\Core\SecurityContext;


class MessageType extends AbstractType
{
    /**
     * @param FormBuilderInterface $builder
     * @param array $options
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('viewability', 'viewability_entity', array(
                'class' => 'MessagesBundle:Viewability',
                'property' => 'name',
                'required' => true,
            ))
            ->add('body', new MessageBodyType())
        ;
    }

    /**
     * @param OptionsResolver $resolver
     */
    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => 'Members\MessagesBundle\Entity\Message',
        ));
    }

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

这是我的可视性实体：

<?php

namespace Members\MessagesBundle\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Entity()
 */
class Viewability
{
    /**
     * @ORM\Column(type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    protected $id;

    /**
     * @ORM\Column(type="string", length=255)
     */
    private $name;

    public function __construct()
    {
    }

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

    /**
     * @param mixed $name
     */
    public function setName($name)
    {
        $this->name = $name;
    }

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

    /**
     * @param mixed $id
     */
    public function setId($id)
    {
        $this->id = $id;
    }
}

---

所以我最终采取了不同的方法来解决这个问题。最初，我试图转换来自实体的数据。幸运的是，这个实体根本不需要是数据库实体，一个简单的选择类型就足够了。这并不能解决转换实体列表的具体问题，但它允许我自定义下拉列表值

可视性实体已删除，消息实体中的关系已更改为整数字段

我现在的主要类型如下：

class MessageType extends AbstractType
{
    private $user;

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

    /**
     * @param FormBuilderInterface $builder
     * @param array $options
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('body', new MessageBodyType())
            ->add('viewability', 'choice', array(
                'choices'   => array(
                    1 => $user->getFirstName(),
                    2 => $user->getAddress()->getCity(),
                    3 => 'Anonymous',
                ),
                'multiple'  => false,
                'label'     => 'Send Message As',
                'data'      => 0,
            ))
        ;
    }

    /**
     * @param OptionsResolver $resolver
     */
    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults(array(
            'data_class'    => 'Members\MessagesBundle\Entity\Message',
        ));
    }

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

---

我仍然对原始问题的答案感兴趣，因为我还没有找到任何关于如何将实体字段的显示文本转换为下拉列表的示例。

<?php

namespace Members\MessagesBundle\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Entity()
 */
class Viewability
{
    /**
     * @ORM\Column(type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    protected $id;

    /**
     * @ORM\Column(type="string", length=255)
     */
    private $name;

    public function __construct()
    {
    }

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

    /**
     * @param mixed $name
     */
    public function setName($name)
    {
        $this->name = $name;
    }

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

    /**
     * @param mixed $id
     */
    public function setId($id)
    {
        $this->id = $id;
    }
}

<?php

namespace Members\MessagesBundle\Form\DataTransformer;

use Symfony\Component\Form\DataTransformerInterface;
use Members\MessagesBundle\Entity\Viewability;
use Symfony\Component\Security\Core\SecurityContext;

class MessageNameTransformer implements DataTransformerInterface
{
    private $user;

    /**
     * @param SecurityContext $context
     */
    public function __construct(SecurityContext $context)
    {
        $this->user = $context->getToken()->getUser();
    }

    /**
     * @param Viewability|null $viewability
     * @return string
     */
    public function transform($viewability)
    {
        if (null === $viewability) {
            return '';
        }

        if($viewability === 'Full Name')
            return sprintf('%s %s', $this->user->getInfo()->getFirstName(), $this->user->getInfo()->getLastName());
        if($viewability === 2)
            return sprintf('Lawyer in %s,  %s', $this->user->getInfo()->getAddress()->getCity(), $this->user->getInfo()->getAddress()->getState());
        if($viewability === 3)
            return 'Anonymous';
    }

    /**
     * @param Viewability $viewability
     * @return Viewability
     */
    public function reverseTransform($viewability)
    {
        return $viewability;
    }
}

class MessageType extends AbstractType
{
    private $user;

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

    /**
     * @param FormBuilderInterface $builder
     * @param array $options
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('body', new MessageBodyType())
            ->add('viewability', 'choice', array(
                'choices'   => array(
                    1 => $user->getFirstName(),
                    2 => $user->getAddress()->getCity(),
                    3 => 'Anonymous',
                ),
                'multiple'  => false,
                'label'     => 'Send Message As',
                'data'      => 0,
            ))
        ;
    }

    /**
     * @param OptionsResolver $resolver
     */
    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults(array(
            'data_class'    => 'Members\MessagesBundle\Entity\Message',
        ));
    }

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