【发布时间】：2016-11-04 17:51:51
【问题描述】：
我无法理解这个：
我按照 symfony 食谱示例解释了如何处理 symfony 形式的数组集合：link
我只用“gigs”和“artists”更改了“tasks”和“tags”。 一切正常，我可以将艺术家添加到演出中，生成的连接表看起来很好。 但是在删除艺术家时，学说不会尝试按预期删除连接表条目，而是尝试将艺术家名称设置为 null ，这无论如何都不起作用并且是错误的。我想保留艺术家，但删除与演出的关系。 因此我自己管理了持久化并且没有用户持久化{“cascade”} ..
我做错了什么？
我希望，我的问题形成得足够好，并且我提供了足够的信息。我试图搜索这个问题，但找不到解决方案。
谢谢
只是
错误：
执行 'UPDATE artist SET name = ?哪里 id = >？带参数 [null, 10]：
SQLSTATE[23000]：违反完整性约束：1048 列“名称”不能>为空
演出.php：
/**
* @var \Doctrine\Common\Collections\ArrayCollection|Artist[]
*
* @ORM\ManyToMany(targetEntity="GoetzBundle\Entity\Artist", inversedBy="gigs"),
* @ORM\JoinTable(name="gigs_artits")
*/
private $artists;
...
/**
* @return ArrayCollection|Artist
*/
public function getArtists()
{
return $this->artists;
}
/**
* @param Artist $artist
* @return ArrayCollection|Artist
*/
public function addArtist($artist)
{
$artist->addGig($this);
$this->artists->add($artist);
return $this->artists;
}
/**
* @param Artist $artist
* @return ArrayCollection|Artist
*/
public function removeArtist($artist)
{
$artist->removeGig($this);
$this->artists->removeElement($artist);
return $this->artists;
}
艺术家.php
/**
* @var \Doctrine\Common\Collections\ArrayCollection|Gig[]
*
* @ORM\ManyToMany(targetEntity="GoetzBundle\Entity\Gig", mappedBy="artists", fetch="EAGER")
*
*/
private $gigs;
...
/**
* @param Gig $gig
* @return ArrayCollection|Gig
*/
public function addGig(Gig $gig)
{
if (!$this->gigs->contains($gig)) {
$this->gigs->add($gig);
}
return $this->gigs;
}
/**
* @param Gig $gig
* @return ArrayCollection|Gig
*/
public function removeGig(Gig $gig)
{
if ($this->gigs->contains($gig)) {
$this->gigs->removeElement($gig);
}
return $this->gigs;
}
gigtype.php
...
$builder
->add('artists', CollectionType::class, array(
'entry_type' => ArtistType::class,
'allow_add' => true,
'by_reference' => false,
'allow_delete' => true,
))
...
gigcontroller.php
public function newAction(Request $request)
{
$gig = new Gig();
$form = $this->createForm('GoetzBundle\Form\GigType', $gig);
$form->handleRequest($request);
if ($form->isSubmitted() && $form->isValid()) {
$em = $this->getDoctrine()->getManager();
foreach ($gig->getArtists() as $artist){
$em->persist($artist);
}
$em->persist($gig);
$em->flush();
return $this->redirectToRoute('gig_show', array('id' => $gig->getId()));
}
return $this->render('@Goetz/gig/new.html.twig', array(
'gig' => $gig,
'form' => $form->createView(),
));
}
...
public function editAction(Request $request, Gig $gig)
{
$deleteForm = $this->createDeleteForm($gig);
$em = $this->getDoctrine()->getManager();
$gig = $em->getRepository('GoetzBundle:Gig')->find($gig);
$originalArtists = new ArrayCollection();
foreach ($gig->getArtists() as $artist){
$originalArtists->add($artist);
}
$editForm = $this->createForm('GoetzBundle\Form\GigType', $gig);
$editForm->handleRequest($request);
if ($editForm->isSubmitted() && $editForm->isValid()) {
foreach ($originalArtists as $artist){
if (false === $gig->getArtists()->contains($artist)){
$artist->getGigs()->removeElement($gig);
}
$em->persist($artist);
}
$em = $this->getDoctrine()->getManager();
foreach ($gig->getArtists() as $artist){
$em->persist($artist);
}
$em->persist($gig);
$em->flush();
return $this->redirectToRoute('gig_edit', array('id' => $gig->getId()));
}
return $this->render('Goetz/gig/edit.html.twig', array(
'gig' => $gig,
'edit_form' => $editForm->createView(),
'delete_form' => $deleteForm->createView(),
));
}
edit.html.twig
{% block content %}
<h1>Gig edit</h1>
{{ form_start(edit_form) }}
<h3>Artists</h3>
<ul class="artists" data-prototype="{{ form_widget(edit_form.artists.vars.prototype)|e('html_attr') }}">
{% for artist in edit_form.artists %}
<li>{{ form_row(artist.name) }}</li>
{% endfor %}
</ul>
{{ form_rest(edit_form) }}
<input type="submit" value="Edit" />
{{ form_end(edit_form) }}
<ul>
<li>
<a href="{{ path('gig_index') }}">Back to the list</a>
</li>
<li>
{{ form_start(delete_form) }}
<input type="submit" value="Delete">
{{ form_end(delete_form) }}
</li>
</ul>
{% endblock %}
{% block javascripts %}
{{ parent() }}
<script type="text/javascript" src="{{ asset('bundles/goetz/js/artists.js') }}"></script>
{% endblock %}
（新的看起来一样）
艺术家.js
var $collectionHolder;
// setup an "add a artist" link
var $addArtistLink = $('<a href="#" class="add_tag_link">Künstler hinzufügen</a>');
var $newLinkLi = $('<li></li>').append($addArtistLink);
jQuery(document).ready(function() {
// Get the ul that holds the collection of artists
$collectionHolder = $('ul.artists');
$collectionHolder.find('li').each(function() {
addArtistFormDeleteLink($(this));
});
// add the "add a artist" anchor and li to the artists ul
$collectionHolder.append($newLinkLi);
// count the current form inputs we have (e.g. 2), use that as the new
// index when inserting a new item (e.g. 2)
$collectionHolder.data('index', $collectionHolder.find(':input').length);
$addArtistLink.on('click', function(e) {
// prevent the link from creating a "#" on the URL
e.preventDefault();
// add a new artist form (see next code block)
addArtistForm($collectionHolder, $newLinkLi);
});
});
function addArtistForm($collectionHolder, $newLinkLi) {
// Get the data-prototype explained earlier
var prototype = $collectionHolder.data('prototype');
// get the new index
var index = $collectionHolder.data('index');
// Replace '__name__' in the prototype's HTML to
// instead be a number based on how many items we have
var newForm = prototype.replace(/__name__/g, index);
// increase the index with one for the next item
$collectionHolder.data('index', index + 1);
// Display the form in the page in an li, before the "Add a artist" link li
var $newFormLi = $('<li></li>').append(newForm);
$newLinkLi.before($newFormLi);
addArtistFormDeleteLink($newFormLi);
}
function addArtistFormDeleteLink($artistFormLi) {
var $removeFormA = $('<a href="#">diesen Künstler löschen</a>');
$artistFormLi.append($removeFormA);
$removeFormA.on('click', function(e) {
// prevent the link from creating a "#" on the URL
e.preventDefault();
// remove the li for the tag form
$artistFormLi.remove();
});
}
【问题讨论】：
标签： symfony doctrine-orm