Editing Slug using Gedmo TreeSlugHandler - forms

Question

I have an entity that is hierarchical using the Gedmo Tree Doctrine extension in Symfony 2. The code for the Category entity is:
<?php
namespace MD\Entity;
use Doctrine\Common\Collections\ArrayCollection;
use Symfony\Component\Validator\Constraints as Assert;
use Doctrine\ORM\Mapping as ORM;
use Gedmo\Mapping\Annotation as Gedmo;
use MD\Entity\Extension\Treeable;
/**
* Category
*
* #ORM\Entity(repositoryClass="MD\Entity\Repository\CategoryRepository")
*
* #Gedmo\Tree(type="nested")
*/
class Category
{
/**
* Entity Extensions
*/
use Treeable;
/**
* The ID of the category
*
* #ORM\Id
* #ORM\Column(type="integer")
* #ORM\GeneratedValue(strategy="AUTO")
*/
protected $id;
/**
* The title of the category
*
* #var string
*
* #ORM\Column(type="string", length=255)
*
* #Assert\NotBlank(message="category.title.not_blank")
* #Assert\Length(
* max=255,
* maxMessage="category.title.length.max"
* )
*/
protected $title;
/**
* The description of the category
*
* #var string
*
* #ORM\Column(type="text")
*
* #Assert\NotBlank(message="category.description.not_blank")
*/
protected $description;
/**
* The parent of the category
*
* #var Category
*
* #ORM\ManyToOne(targetEntity="Category", inversedBy="children")
* #ORM\JoinColumn(name="parent_id", referencedColumnName="id", onDelete="CASCADE")
*
* #Gedmo\TreeParent
*/
protected $parent;
/**
* The children of the category
*
* #var ArrayCollection
*
* #ORM\OneToMany(targetEntity="Category", mappedBy="parent", cascade={"persist"})
* #ORM\OrderBy({"left" = "ASC"})
*/
protected $children;
/**
* The slug of the category
*
* #var string
*
* #ORM\Column(type="string", length=255, unique=true)
*
* #Gedmo\Slug(handlers={
* #Gedmo\SlugHandler(class="Gedmo\Sluggable\Handler\TreeSlugHandler", options={
* #Gedmo\SlugHandlerOption(name="parentRelationField", value="parent"),
* #Gedmo\SlugHandlerOption(name="separator", value="/")
* })
* }, fields={"title"})
*/
protected $slug;
/**
* Constructor
*/
public function __construct()
{
$this->children = new ArrayCollection();
}
/**
* Get the ID of the category
*
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set the title of the category
*
* #param string $title
*
* #return $this
*/
public function setTitle($title)
{
$this->title = $title;
return $this;
}
/**
* Get the title of the category
*
* #return string
*/
public function getTitle()
{
return $this->title;
}
/**
* Set the description of the category
*
* #param string $description
*
* #return $this
*/
public function setDescription($description)
{
$this->description = $description;
return $this;
}
/**
* Get the description of the category
*
* #return string
*/
public function getDescription()
{
return $this->description;
}
/**
* Set the parent of the category
*
* #param Category $parent
*
* #return $this
*/
public function setParent(Category $parent = null)
{
$this->parent = $parent;
if (null !== $parent) {
$parent->addChild($this);
}
return $this;
}
/**
* Get the parent of the category
*
* #return Category
*/
public function getParent()
{
return $this->parent;
}
/**
* Add a child to the category
*
* #param Category $child
*
* #return $this
*/
public function addChild(Category $child = null)
{
if (!$this->children->contains($child)) {
$this->children->add($child);
$child->setParent($this);
}
return $this;
}
/**
* Get the children of the category
*
* #return ArrayCollection
*/
public function getChildren()
{
return $this->children;
}
/**
* Set the slug of the category
*
* #param string $slug
*
* #return $this
*/
public function setSlug($slug)
{
$this->slug = $slug;
return $this;
}
/**
* Get the slug of the category
*
* #return string
*/
public function getSlug()
{
return $this->slug;
}
/** Magic Methods */
/**
* Return a string representation of the category
*
* #return string
*/
public function __toString()
{
return $this->getTitle();
}
}
Given a category with a title of Bands and a sub-category with a title of Rock, the latter category, on creation, has a slug of bands/rock. This works as expected.
When I add the slug field to a form, however, when I edit the entity, I initially get bands/rock added to the form field. If I change this to bands/rock-and-roll and submit the form, the slug gets updated to bands/bands-rock-and-roll and not bands/rock-and-roll as I'd expect.
If I edit the category and set the slug field to rock-and-roll, then submit the form, the slug gets updated to bands/rock-and-roll. I'd expect the slug to be rock-and-roll after update.
What do I need to do to fix this behaviour? I essentially want the slug to be auto-generated with the handler if it's not provided, but to be set to exactly what I provide if I do provide it.
Thanks

Answer 1

looking at the docs of the Gedmo Tree Doctrine extension and it's relative code, it's not a wrong behaviour because the slug is composed accordingly with the "TreeSlugHandler" method = parentFieldName/field-You-Have-Inserted (that happens every time you edit the slug).
If you need at the same moment of a slug for a specific category and of another that follows the category tree you can add another property (ex: cat_slug) with the simple annotation: #Gedmo\Slug(fields={"fieldYouWantToSlug"}).
Remember that every time (using the "TreeSlugHandler" method) you edit the slug (changing the precedent), every subcategory will be updated with the new slug.
I hope I was helpful