CategoriesType

The CategoriesModule provides a CategoriesType form type for ease of use with Symfony Forms. It is implemented by the \Zikula\CategoriesModule\Form\Type\CategoriesType class.

Class naming for CategoryAssignmentEntity

The "categories" term is often interchanged with the Entity that defines the assignment of the category (which is not the same thing, but a common misunderstanding). To help clarify this, a new naming scheme has been used here: categoryAssignments instead of simply categories. See the AbstractCategoryAssignment doc for more information.

Assuming you have registered your entity to utilize at least one branch of categories in the Categories module.

Example

Assuming your Entities are set up like this:

PageEntity

class PageEntity extends \Zikula\Bundle\CoreBundle\Doctrine\EntityAccess
{
    /**
     * @ORM\Id
     * @ORM\Column(type="integer")
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @ORM\OneToMany(targetEntity="Zikula\PagesModule\Entity\CategoryAssignmentEntity",
     *                mappedBy="entity", cascade={"remove", "persist"},
     *                orphanRemoval=true, fetch="EAGER")
     */
    private $categoryAssignments;

    /**
     * @return ArrayCollection
     */
    public function getCategoryAssignments()
    {
        return $this->categoryAssignments;
    }

    /**
     * @param ArrayCollection $assignments
     */
    public function setCategoryAssignments(ArrayCollection $assignments)
    {
        foreach ($this->categoryAssignments as $categoryAssignment) {
            if (false === $key = $this->collectionContains($assignments, $categoryAssignment)) {
                $this->categoryAssignments->removeElement($categoryAssignment);
            } else {
                $assignments->remove($key);
            }
        }
        foreach ($assignments as $assignment) {
            $this->categoryAssignments->add($assignment);
        }
    }

    /**
     * Check if a collection contains an element based only on two criteria (categoryRegistryId, category).
     * @param ArrayCollection $collection
     * @param CategoryAssignmentEntity $element
     * @return bool|int
     */
    private function collectionContains(ArrayCollection $collection, CategoryAssignmentEntity $element)
    {
        foreach ($collection as $key => $collectionAssignment) {
            /** @var CategoryAssignmentEntity $collectionAssignment */
            if ($collectionAssignment->getCategoryRegistryId() == $element->getCategoryRegistryId()
                && $collectionAssignment->getCategory() == $element->getCategory()
            ) {
                return $key;
            }
        }

        return false;
    }

CategoryAssignmentEntity

use Zikula\CategoriesModule\Entity\AbstractCategoryAssignment;

class CategoryAssignmentEntity extends AbstractCategoryAssignment
{
    /**
     * @ORM\ManyToOne(targetEntity="Zikula\PagesModule\Entity\PageEntity", inversedBy="assignments")
     * @ORM\JoinColumn(name="entityId", referencedColumnName="pageid")
     * @var PageEntity
     */
    private $entity;

    /**
     * @return PageEntity
     */
    public function getEntity()
    {
        return $this->entity;
    }

    /**
     * @param PageEntity $entity
     */
    public function setEntity($entity)
    {
        $this->entity = $entity;
    }
}

PageType

class PageType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->add('categoryAssignments', CategoriesType::class, [
            'required' => false,
            'multiple' => true,
            'module' => 'ZikulaPagesModule',
            'entity' => 'PageEntity',
            'entityCategoryClass' => CategoryAssignmentEntity::class,
        ]);
    }
}

Required options

• module - The Common (short) name for the providing module.
• entity - The Common (short) name of the entity used in the Category Registry.
• entityCategoryClass - The FqCN of the assignment entity for the category relation.
• em - An instance of a Doctrine Object Manager.

Optional options

• required - (boolean) is the field required (default true).
• multiple - (boolean) allow multiple selections (default false).
• direct - (boolean) use only direct children or include all descendant generations (default true).
• attr - (array) attributes array for each select box (default []).
• showRegistryLabels - (boolean) set to true to show a label for each single selector based on the base category assigned in the corresponding registry (default false).