我有一个表单酒店，其中包含一些CollectionType，它还包含一些CollectionType。在这种形式中，我想添加一个父实体，它可以包含多个子节点，这些子节点可能同样包含多个实体：
class HotelType extends AbstractType{
/**
* @param FormBuilderInterface $builder
* @param array $options
*/
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('rooms', CollectionType::class, array(
'entry_type' => RoomType::class,
"label" => "Add rooms",
'allow_add' => true,
'allow_delete' => true,
'prototype' => true,
))
class RoomType extends AbstractType{
/**
* @param FormBuilderInterface $builder
* @param array $options
*/
public function buildForm(FormBuilderInterface $builder, array $options){
$builder
->add('pictures', CollectionType::class, array(
'entry_type' => PictureRoomType::class,
"label" => "Add pictures",
'allow_add' => true,
'allow_delete' => true,
'prototype' => true,
))
->add('prices', CollectionType::class, array(
'entry_type' => PriceRoomType::class,
"label" => "Add prices",
'allow_add' => true,
'allow_delete' => true,
'prototype' => true,
))
;
这里是实体关系：
class Room {
/**
* @ORM\ManyToOne(targetEntity = "Hotel", inversedBy = "rooms")
* @ORM\JoinColumn(name = "id_hotel", referencedColumnName = "id")
*/
private $hotel;
/**
* @ORM\OneToMany(targetEntity="PictureRoom", mappedBy="room", cascade={"remove", "persist"})
*/
private $pictures;
/**
* @ORM\OneToMany(targetEntity="PriceRoom", mappedBy="room", cascade={"remove", "persist"})
*/
private $prices;
class Hotel {
/**
* @ORM\OneToMany(targetEntity="Room", mappedBy="hotel", cascade={"remove", "persist"})
*/
private $rooms;
酒店控制器：
class HotelController extends Controller{
/**
* Creates a new Hotel entity.
*
* @Route("/new", name="hotel_new")
* @Method({"GET", "POST"})
*/
public function newAction(Request $request)
{
$hotel = new Hotel();
$form = $this->createForm('AppBundle\Form\HotelType', $hotel);
$form->handleRequest($request);
if ($form->isSubmitted() && $form->isValid()) {
if ($hotel->getRooms() != null) {
foreach ($hotel->getRooms() as $room) {
if (!empty($room)) {
$room->setHotel($hotel);
if ($room->getPictures() != null) {
foreach ($room->getPictures() as $picture) {
if (!empty($picture)) {
$picture->setRoom($room);
$picture->upload();
}
}
}
if ($room->getPrices() != null) {
foreach ($room->getPrices() as $price) {
if (!empty($price)) {
$price->setRoom($room);
$price->setIdTva($price->getIdTva()->getId());
}
}
}
$room->setIdTva($room->getIdTva()->getTva());
}
}
}
我有一个处理字段追加的JS文件：
$(document).ready(function () {
var fields = $('div[data-prototype]');
var childElementCount = 1;
fields.each(function (index) {
var field = $(this);
var elementCount = 1;
field.parent().append('<a href="#" class="btn btn-primary" id="add-another-' + index + '"><i class="glyphicon glyphicon-plus"></i> Add an element</a>');
var trigger = $("#add-another-" + index);
var childCollections;
trigger.click(function (e) {
var newWidget = field.attr('data-prototype');
newWidget = newWidget.replace(/label__/g, "");
newWidget = newWidget.replace(/col-md-6/g, "col-md-12");
newWidget = newWidget.replace(/__name__/g, elementCount);
e.preventDefault();
elementCount++;
field.parent().append(newWidget);
childCollections = field.parent().find('.collection');
if(childCollections.length == 1){
childCollections.parent().append('<a href="#" class="btn btn-primary" id="add-another-' + index + '-'+ elementCount + '"><i class="glyphicon glyphicon-plus"></i> Add an element</a>');
var childTrigger = $('#add-another-' + index + '-' + elementCount);
childTrigger.click(function (e) {
var newChildWidget = childCollections.find('div[data-prototype]').attr('data-prototype');
//newChildWidget = newChildWidget.replace(/__child__/g, "_" + childElementCount);
console.log(newChildWidget);
e.preventDefault();
childElementCount += 1;
console.log(childElementCount);
childCollections.parent().append(newChildWidget);
});
} else if (childCollections.length > 1) {
childCollections.each(function(childIndex){
var childField = $(this);
childField.parent().append('<a href="#" class="btn btn-primary" id="add-another-' + index + '-'+ elementCount + childIndex + '"><i class="glyphicon glyphicon-plus"></i> Add an element</a>');
var childTrigger = $('#add-another-' + index + '-' + elementCount + childIndex);
childTrigger.click(function (e) {
var newChildWidget = childField.find('div[data-prototype]').attr('data-prototype');
//newChildWidget = newChildWidget.replace(/__child__/g, "_" + childElementCount);
console.log(newChildWidget);
e.preventDefault();
childElementCount+= 1;
console.log(childElementCount);
childField.parent().append(newChildWidget);
});
})
}
});
});
该事件有效，当我点击＆＃34;添加元素＆＃34;时，正确的Form中附加正确的FormType。但是当我提交数据时，诸如PictureRoom或PriceRoom的孙子字段不会持久保存到数据库中。有人知道如何使用这种嵌套的CollectionType表单吗？
非常感谢你的帮助。
答案 0 :(得分：2)
重要的是要理解，CollectionType是Symfony Form Component的一个特性，并且它不需要学说很多。
因此，使用CollectionType，您将在Form Data ArrayCollection中拥有一些对象，但是如何处理和持久化它们 - 这完全是您的责任。
就个人而言，我更喜欢使用empty_data属性来持久保存通过CollectionType创建的新实体。
有点像
->add('prices', CollectionType::class, array(
'entry_type' => PriceRoomType::class,
"label" => "Add prices",
'allow_add' => true,
'allow_delete' => true,
'prototype' => true,
'empty_data' => function (FormInterface $form) {
$price = PriceRoom();
$price->setRoom($form->getParent()->getData());
return $price;
},
))
Room和Picture相同。并且您必须在任何级别cascade={"remove", "persist"}（酒店要保留的房间）。
在这种情况下，不确定$form->getParent()->getData()是否会有Room个实体，但无论如何它可以以某种方式从$form对象访问，只需用代码播放一下。