Symfony2-如何定义窗体和控制器以一次动态创建实体的多个对象? [英] Symfony2 - How do I define Form and Controllers to dynamically create multiple objects of a entity at once?
问题描述
Symfony2 2.7
Symfony2 2.7
我环顾四周，但是找不到一种简洁，标准的定义方式:
I have looked around, but I do not find a neat, standard way to define:
(*)表单(formType)和所需的任何控制器，让用户可以动态创建并且可以随心所欲地创建任意数量的对象.
(*) a form (formType) and whatever controller you need to let a user to create dynamically and at once as many objects as she wishes.
I see here and here, but I am not able to reproduce their solutions.
问题是:有没有一种标准的方法(*)?
Question is: is there a standard way to do (*)?
注意:此似乎无济于事，即使它只允许用户(动态)创建多个Tag对象，也只能创建一个唯一的Task对象.
Note: This does not seem to help, in the sense that it creates only a unique Task object, even if it let a user to create (dynamically) several Tag ones.
解决方案 可以很好地执行以下操作:用户可以根据需要添加任意数量的对象.
PARTIAL SOLUTION The following works fine: a user may add as many objects as she wishes.
我需要检查是否可以某种方式清除代码. 如果您认为有改进的方法，请发表评论.
I need to check whether I may clean the code somehow. If you see a way to improve it, please comment.
最终，我希望有一个Job 1:M Tasks 1:M Tags的情况，该表单具有一次创建多个Job，每个Job多个任务，每个Task多个标签的表单.我需要检查是否可以嵌入相关的1:M实体的表单.敬请期待！
Eventually, I wish to have a Job 1:M Tasks 1:M Tags situation, with a form to create at once many Jobs, many Tasks for each Job, many Tags for each Task. I need to check that I may embed forms for the related 1:M entities. Stay tuned!
控制器
/**
* Creates a new Job entity.
*
* @Route("/", name="Myname_Job_create")
* @Method("POST")
* @Template("MynameBlogBundle:Job:new.html.twig")
*/
public function createAction(Request $request)
{
////var_dump($request); die('here'); // this helped a lot to understand
$postData = $request->request->get('form');
$entity = array();
foreach($postData['jobs'] as $key => $obj){$entity[$key]= new Job();}
$form = $this->createCreateForm($entity);
$form->handleRequest($request);
if ($form->isValid()) {
try {
$em = $this->getDoctrine()->getEntityManager();
foreach($entity as $ent){ $em->persist($ent); }
$em->flush();
} catch (\Doctrine\DBAL\DBALException $e) {
die($e->getMessage());
}
return $this->redirect($this->generateUrl('Myname_Job'));
}
return array(
'info' => $postData,
'entity' => $entity,
'form' => $form->createView(),
);
}
/**
* Creates a form to create a Job entity.
*
* @param Job $entity The entity
*
* @return \Symfony\Component\Form\Form The form
*/
private function createCreateForm(Array $jobs)
{
$form = $this->createFormBuilder(array('jobs'=>$jobs))
->setAction($this->generateUrl('Myname_Job_create'))
->add('jobs','collection',array(
'required' => true,
'allow_add' => true,
'allow_delete' => true,
'type' => new JobType(),
))
->add('submit', 'submit',array('label' => 'Create'))
->getForm()
;
return $form;
}
/**
* Displays a form to create a new Job entity.
*
* @Route("/new", name="Myname_Job_new")
* @Method("GET")
* @Template()
*/
public function newAction()
{
$jobs = array(0 => new Job());
$form = $this->createCreateForm($jobs);
return array(
'entity' => $jobs,
'form' => $form->createView(),
);
}
JobType
class JobType extends AbstractType
{
/**
* @param FormBuilderInterface $builder
* @param array $options
*/
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('title', 'text', array(
'label' => 'Write Title ',
'required' => true
))
->add('description','text',array(
'label' => 'Write Descr. ',
))
;
}
....
}
新的.twig模板
{% extends '::base.html.twig' %}
{% block javascripts %}
{{ parent() }}
<script src="{{ asset('bundles/mynameblog/js/JQuery/jquery-2.1.0.js') }}" type="text/javascript">
</script>
<script>
var $collectionHolder;
// setup an "add aJobs" link
var $addJobLink = $('<a href="#" class="add_Job_link">Add Jobs</a>');
var $newLinkLi = $('<li></li>').append($addJobLink);
function addJobForm($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 Jobs" link li
var $newFormLi = $('<li></li>').append(newForm);
$newLinkLi.before($newFormLi);
}
jQuery(document).ready(function() {
// Get the ul that holds the collection of Jobs
$collectionHolder = $('ul.jobs');
// add the "add Jobs" anchor and li to the Jobs 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);
$addJobLink.on('click', function(e) {
// prevent the link from creating a "#" on the URL
e.preventDefault();
// add a newJobs form (see next code block)
addJobForm($collectionHolder, $newLinkLi);
});
});
</script>
{% endblock %}
{% block main -%}
<h1>Job creation</h1>
{{ form_start(form) }}
<ul class="jobs" data-prototype="{{ form_widget(form.jobs.vars.prototype)|e }}">
{# render the job-s only two fields: title description #}
{% for f in form.jobs %}
<li> {{ form_row(f) }} </li>
{% endfor %}
</ul>
{{ form_end(form) }}
{% endblock %}
推荐答案
建议:通过一个客户端操作添加多个对象的最佳方法:
- 为每个对象创建一个表单(只需使用JS复制即可)
- 使用JS，侦听提交"按钮，并使用不同的ajax请求发送每个表单.
所以这很简单... 无需复杂的表单即可在接收已发布请求的控制器中管理服务器实体.
So it is very simple ... No need to have a complicated form por to manage serveral entities in the controller receiving the posted request.
但是，要做您想做的事情:
这是一种执行所需操作的方法. 我只强调了如何在服务器端修改表格. 我无法测试您的JS，在这里我假设它在您的表单中添加了[title_1，description_1，title_2，description_2，...]之类的字段.
Here is a way to do what you want. I have only highlighted how to adapt the form on the server side. I cannot test your JS, and here I'm assuming it add fields like [title_1,description_1,title_2,description_2,...] in your form.
您还应该调整:
- 如何创建实体
- 您如何验证它们
我建议您使用"objects_count"选项来修改表格: (请注意，您应该处理不带类的表单(data_class不应在configureOptions中定义))
I suggest you to adapt your form with an option "objects_count" : (notice that you should deal with a form without class (data_class should not be defined in configureOptions))
class JobType extends AbstractType
{
/**
* @param FormBuilderInterface $builder
* @param array $options
*/
public function buildForm(FormBuilderInterface $builder, array $options)
{
// This is called once you posted your form to recreate the JS generated
// fiels on the server side. Otherwise, these fiels are ignorated
if($options['objects_count']>0){
for($i=0;$i<$options['objects_count'];$i++){
$builder
->add('title_'.$i, TextType::class)
->add('description_'.$i, TextType::class)
;
}
}
// This is called to render the first form
else{
$builder
->add('title', TextType::class)
->add('description', TextType::class)
;
}
}
/**
* @param OptionsResolver $resolver
*/
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults(array('objects_count'=>0));
}
}
然后，要处理此表单，您必须获取已发布字段的数量:
Then, to deal with this form you have to get the count of posted fields :
您的控制器:
/**
* Creates a new Job entity.
*
* @Route("/", name="Myname_Job_create")
* @Method("POST")
* @Template("MynameBlogBundle:Job:new.html.twig")
*/
public function createAction(Request $request)
{
$i = 1;
$defaults = array();
while($request->request->has('title_'.$i)){
$defaults += array('title_'.$i=>"",'description_'.$i=>"");
$i++;
}
$objects_count = $i-1;
if($objects_count === 0){
$defaults = array('title'=>"",'description'=>"");
}
$form = $this->$defaults(JobType::class,$defaults,array('objects_count'=>$objects_count));
$form->handleRequest($request);
// ...
}
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