Symfony 2 嵌入式表单集合多对多

Symfony 2 Embedded Form Collection Many to Many(Symfony 2 嵌入式表单集合多对多)

问题描述

我有 2 个实体 - 用户和组.它们具有多对多关系，Group 用于存储用户的角色.

I have 2 Entities - User and Group. They have a many-to-many relationship and Group is used to store a users' roles.

我正在尝试通过添加集合来制作用户编辑表单，我希望能够通过从下拉列表中选择来添加新角色(仅限于数据库中已有的内容)

I'm trying to make a User edit form by adding a collection, I want to be able to add a new role by selecting it from a dropdown (limited to what's already in the DB)

用户类型.php:

class UserType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('username')
            ->add('email')
            ->add('forename')
            ->add('surname')
            ->add('isActive')
            ->add('joinDate', 'date', array('input' => 'datetime', 'format' => 'dd-MM-yyyy'))
            ->add('lastActive', 'date', array('input' => 'datetime', 'format' => 'dd-MM-yyyy'))
            ->add('groups', 'collection', array(
                    'type' => new GroupType(),
                    'allow_add' => true,
                    ))
        ;
    }

    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => 'SfoxCoreBundleEntityUser'
        ));
    }
}

和 GroupType.php:

and GroupType.php:

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

    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setDefaults(array(
                "data_class" => 'SfoxCoreBundleEntityGroup'
                ));
    }
}

这会在基本文本框中显示表单中的角色，但是如果我在表单中添加一个条目，它会将一个新条目级联到 Groups 中，如果我要编辑一个条目，它会更改底层 Group 数据.

This displays the roles in the form in basic text boxes, but if I add an entry to the form, it will cascade persist a new entry into Groups and if I were to edit an entry, it would change the underlying Group data.

我尝试制作一个 GroupSelectType.php:

I tried making a GroupSelectType.php:

class GroupSelectType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('role', 'entity', array('class'=>'SfoxCoreBundle:Group', 'property'=>'name'));
    }

    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setDefaults(array(
                "data_class" => 'SfoxCoreBundleEntityGroup'
                ));
    }
}

将该字段添加为实体"类型，这将显示正确的选择框(但使用默认值)我似乎无法将其绑定到 UserType 表单！

Adding the field as an "entity" type, this displays the correct select box (but with the default values) I cant seem to bind it to the UserType form!

我想要表单做的只是修改用户实体中的底层组"ArrayCollection.

All I want the form to do is modify the underlying 'groups' ArrayCollection in the User entity.

有谁知道我如何做到这一点?

Does anyone know how I can achieve this?

推荐答案

我为其他遇到类似问题的人制定了解决方案...

Well I worked out a solution for anyone else struggling with similar problems...

我必须创建一个自定义表单类型并将其声明为服务，这样我才能传入实体管理器.然后我需要制作一个 dataTransformer 将我的组对象更改为表单的整数

I had to create a custom form type and declare it as a service so I could pass in the Entity Manager. I then needed to make a dataTransformer to change my group objects into an integer for the form

自定义组选择类型:

class GroupSelectType extends AbstractType

{
    /**
     * @var ObjectManager
     */
    private $om;

    private $choices;

    /**
     * @param ObjectManager $om
     */
    public function __construct(ObjectManager $om)
    {
        $this->om = $om;

        // Build our choices array from the database
        $groups = $om->getRepository('SfoxCoreBundle:Group')->findAll();
        foreach ($groups as $group)
        {
            // choices[key] = label
            $this->choices[$group->getId()] = $group->getName() . " [". $group->getRole() ."]";
        }
    }

    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $transformer = new GroupToNumberTransformer($this->om);
        $builder->addModelTransformer($transformer);
    }

    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setDefaults(array(
                "choices" => $this->choices,
                ));
    }

    public function getParent()
    {
        return 'choice';
    }

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

在构造函数中，我获取所有可用组并将它们放入选择"数组中，该数组作为选项传递给选择框.

In the constructor I'm getting all available groups and putting them into a "choices" array which is passed to the select box as an option.

您还会注意到我正在使用自定义数据转换器，这是为了将 groupId(用于呈现表单)更改为 Group 实体.我也将 GroupSelectType 设为服务并传入 [@doctrine.orm.entity_manager]

You'll also notice I'm using a custom data transformer, this is to change the groupId (which is used in the rendering of the form) to a Group entity. I made the GroupSelectType a service as well and passed in the [@doctrine.orm.entity_manager]

services.yml(捆绑配置):

services.yml (bundle config):

services:
    sfox_core.type.group_select:
        class: SfoxCoreBundleFormTypeGroupSelectType
        arguments: [@doctrine.orm.entity_manager]
        tags:
          - { name: form.type, alias: group_select }

GroupToNumberTransformer.php

GroupToNumberTranformer.php

class GroupToNumberTransformer implements DataTransformerInterface
{
    /**
     * @var ObjectManager
     */
    private $om;

    /**
     * @param ObjectManager $om
     */
    public function __construct(ObjectManager $om)
    {
        $this->om = $om;
    }

    /**
     * Transforms an object (group) to a string (number).
     *
     * @param  Group|null $group
     * @return string
     */
    public function transform($group)
    {
        if (null === $group) {
            return "";
        }

        return $group->getId();
    }

    /**
     * Transforms a string (number) to an object (group).
     *
     * @param  string $number
     * @return Group|null
     * @throws TransformationFailedException if object (group) is not found.
     */
    public function reverseTransform($number)
    {
        if (!$number) {
            return null;
        }

        $group = $this->om
        ->getRepository('SfoxCoreBundle:Group')
        ->findOneBy(array('id' => $number))
        ;

        if (null === $group) {
            throw new TransformationFailedException(sprintf(
                    'Group with ID "%s" does not exist!',
                    $number
            ));
        }

        return $group;
    }
}

还有我修改后的 UserType.php - 请注意，我现在正在使用我的自定义表单类型group_select"，因为它作为服务运行:

And my modified UserType.php - Notice I'm using my custom form type "group_select" now as it's running as a service:

class UserType extends AbstractType
{
    private $entityManager;

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

    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $transformer = new GroupToNumberTransformer($this->entityManager);

        $builder
            ->add('username')
            ->add('email')
            ->add('forename')
            ->add('surname')
            ->add('isActive')
            ->add('joinDate', 'date', array('input' => 'datetime', 'format' => 'dd-MM-yyyy'))
            ->add('lastActive', 'date', array('input' => 'datetime', 'format' => 'dd-MM-yyyy'));
        $builder
            ->add(
                $builder->create('groups', 'collection', array(
                    'type' => 'group_select',
                    'allow_add' => true,
                    'options' => array(
                            'multiple' => false,
                            'expanded' => false,
                            )
                    ))
        );
    }

    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => 'SfoxCoreBundleEntityUser'
        ));
    }

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

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