我想知道在symfony2中使用额外字段创建处理多对多关系的表单的最佳方法是什么。
对于这个例子,我想说我想为用户创建一个通知功能。我有User
和Notification
个实体。另外,为了能够在实体之间的多对多关系中添加额外参数,我创建了第三个实体UserNotification
。额外参数指示用户是否已阅读通知。
* @ORM\Entity() */
class Notification
{
/** @Id @Column(type="integer") */
private $id;
/** @OneToMany(targetEntity="UserNotification", mappedBy="notification") */
private $usernotifications;
/** @Column() */
private $message;
...
}
* @ORM\Entity() */
class User
{
/** @Id @Column(type="integer") */
private $id;
/** @OneToMany(targetEntity="UserNotification", mappedBy="user") */
private $usernotifications;
/** @Column() */
private $name;
...
}
* @ORM\Entity() */
class UserNotification
{
/** @ManyToOne(targetEntity="User", inversedBy="usernotifications")
private $user;
/** @ManyToOne(targetEntity="Message", inversedBy="usernotifications")
private $message;
/** @Column(type="boolean") */
private $isRead;
...
}
这样我就可以获得这种数据
User
+----+---------+
| id | name |
+----+---------+
| 1 | John |
| 2 | Paul |
+----+---------+
Notification
+----+----------------------+
| id | message |
+----+----------------------+
| 1 | Cool stuff |
| 2 | Lorem ipsum |
+----+----------------------+
UserNotification
+---------+-----------------+---------+
| user_id | notification_id | isRead |
+---------+-----------------+---------+
| 1 | 1 | 1 |
| 2 | 1 | 0 |
| 1 | 2 | 0 |
| 2 | 2 | 1 |
+---------+-----------------+---------+
好了,现在问题是,如何制作一个允许向某些用户发送通知的表单?凭借经典的多对多关系,这不是问题。我有NotificationType
个builder
:
$builder->add('users', 'entity', array(
'class' => 'User',
'property' => 'name',
'multiple' => 'true',
))
->add('message', 'text');
但是由于我必须创建中间UserNotification
实体,我不知道该怎么做。谢谢你的帮助;)
答案 0 :(得分:4)
我做的完全一样。我的InternalMessage
实体是您的Notification
。在表单中,users
字段未映射(property_path
为false
)并且已使用订阅者验证:
public function buildForm(FormBuilder $builder, array $options)
{
$builder
->add('title', 'text', array(
'label' => 'Titolo *'
))
->add('content', 'textarea', array(
'label' => 'Contenuto *'
))
->add('priority', new PriorityType(), array(
'label' => 'Priorità *'
))
->add('users', 'entity', array(
'label' => 'Destinatari *',
'class' => 'Acme\HelloBundle\Entity\User',
'property' => 'select_label',
'multiple' => true,
'expanded' => true,
'property_path' => false,
));
;
$builder->addEventSubscriber(new AddUsersValidationSubscriber());
}
在我的控制器中,我唯一必须做的事情(假设表单有效)是在表单模型中为每个用户创建一个InternalMessageFeedback
实体(与UserNotification
相同):
$message = new InternalMessage();
$form = $this->createForm(new InternalMessageType(), $message);
// ...
// The sender
$message->setUser($this->getSecurityContext()->getToken()->getUser());
// Persist the inverse side
$em = $this->getEntityManager();
$em->persist($message);
// One feedback for each user
/** @var $user \Acme\HelloBundle\Entity\User */
foreach($form->get('users')->getData() as $user) {
$feedback = new InternalMessageFeedback();
// Se the message and user for current feedback
$feedback->setInternalMessage($message);
$feedback->setUser($user);
// Persist the owning side
$em->persist($feedback);
// Sync the inverse side
$message->addInternalMessageFeedback($feedback);
}
$em->flush();
希望这会有所帮助:)