问题
I have a small challenge at least for me which I couldn't solve yet. Could you help me to figure it out?
Actually my question consist of two and I can't split them into a different questions.
I have Symfony2 (2.3.1) installed. Here is my entities:
Category:
// src/Acme/DemoBundle/Entity/Category.php
namespace Acme\DemoBundle\Entity;
use Gedmo\Mapping\Annotation as Gedmo;
use Doctrine\ORM\Mapping as ORM;
/**
* @Gedmo\Tree(type="nested")
* @ORM\Table(name="categories")
* use repository for handy tree functions
* @ORM\Entity(repositoryClass="Gedmo\Tree\Entity\Repository\NestedTreeRepository")
*/
class Category
{
/**
* @ORM\Column(name="id", type="integer")
* @ORM\Id
* @ORM\GeneratedValue
*/
private $id;
/**
* @Gedmo\Translatable
* @ORM\Column(name="name", type="string", length=64)
*/
private $name;
/**
* @Gedmo\TreeLeft
* @ORM\Column(name="lft", type="integer")
*/
private $lft;
/**
* @Gedmo\TreeLevel
* @ORM\Column(name="lvl", type="integer")
*/
private $lvl;
/**
* @Gedmo\TreeRight
* @ORM\Column(name="rgt", type="integer")
*/
private $rgt;
/**
* @Gedmo\TreeRoot
* @ORM\Column(name="root", type="integer", nullable=true)
*/
private $root;
/**
* @Gedmo\TreeParent
* @ORM\ManyToOne(targetEntity="Category", inversedBy="children")
* @ORM\JoinColumn(name="parent_id", referencedColumnName="id", onDelete="CASCADE")
*/
private $parent;
/**
* @ORM\OneToMany(targetEntity="Category", mappedBy="parent")
* @ORM\OrderBy({"lft" = "ASC"})
*/
private $children;
Item:
// src/Acme/DemoBundle/Entity/Item.php
namespace Acme\DemoBundle\Entity;
use DoctrineExtensions\Taggable\Taggable;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Collections\Collection;
/**
* Item entity
*
* @ORM\Table(name="items")
* @ORM\HasLifecycleCallbacks
* @ORM\Entity
*/
class Item implements Taggable
{
/**
* @ORM\Id
* @ORM\Column(type="integer")
* @ORM\GeneratedValue(strategy="AUTO")
*/
protected $id;
/**
* @ORM\Column(name="name", type="string", length=64, nullable=true)
*/
protected $name;
/**
* @ORM\ManyToMany(targetEntity="Category", inversedBy="items")
* @ORM\JoinColumn(name="category_id", referencedColumnName="id"),
* inverseJoinColumn=(name="item_id", referencedColumnName="id")
*
**/
protected $categories;
public function getCategories(){
return $this->categories;
}
public function setCategories($categories){
$this->categories = $categories;
return $this->categories;
}
, my form AddItemForm:
// src/Acme/DemoBundle/Controller/ItemController.php
namespace Acme\DemoBundle\Form;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;
use Doctrine\ORM\EntityRepository;
use Symfony\Component\Validator\Constraints\Collection;
/**
* Add item form
*
*/
class AddModelForm extends AbstractType
{ public function buildForm(FormBuilderInterface $builder, array $options) {
$builder->add('categories', 'collection', array(
'type' => 'entity',
'allow_add' => true,
'allow_delete' => true,
'prototype' => true,
'show_legend' => false,
'data' => array(''),
'widget_add_btn' => array('label' => _('Добавить категорию')),
'options' => array(
'widget_control_group' => false,
'label_render' => false,
'class' => 'AcmeDemoBundle:Category',
'query_builder' => function(EntityRepository $er) {
return $er->createQueryBuilder('c')
->where('c.lvl = 0')
->orderBy('c.id', 'ASC');
},
'property' => 'name',
'empty_value' => _('Choose category'),
),
)
);
}
}
and controller ItemController with simple code:
// src/Acme/DemoBundle/Controller/ItemController.php
...
public function editAction($itemId) {
$item= $em->getRepository('AcmeDemoBundle:Item')
->findOneById($itemId);
$form = $this->createForm(new AddItemForm(), $item);
}
public function addAction() {
$item = new Item();
$form = $this->createForm(new AddItemForm(), $item);
}
...
My categories contains subcategories and subsubcategories, etc... as it is implemented in nested tree doctrine extensions. What am I trying to achieve:
1) When I add new Item I see this view and have this behavior: http://clip2net.com/s/5jcaix (mirror: https://dl.dropboxusercontent.com/u/31477552/symfony2_form_challenge.png )
Right now I have implemented only 1 category working, where parent loads as {{ form.widget(form.categories) }} and child categories are loading with jquery. I don't like my temp solution very much. That's why I am asking for best practice in this case. May be I don't need to re-invent the wheel.
2) When I go for edit an existing Item, I want to transfer categories data to the form to display the result as we had in the add step. The mapping with a single 'entity' type or just a normal type - is easy and done automatically in Symfony2 (or you can specify 'data-class' in default options). But how to implement it in my case? With collection of entities + correct view display?
May be for someone it will be interesting challenge as well as for me and you can help me to resolve this.
来源：https://stackoverflow.com/questions/17380402/symfony2-entity-collection-default-data-and-populating-select-boxes