CODEWITHSUNDEEP
phpsymfonydoctrine-ormentityevent-listener
Victor Bocharsky
Victor Bocharsky

Reputation: 12306

How can I use EventListener for update related Entity?

I create Event Listener for preUpdate of Post entity, that triggered fine, but when I try to update the related entity Category, it thrown an error:

Field "category" is not a valid field of the entity "BW\BlogBundle\Entity\Post" in PreUpdateEventArgs.

My Event Listener code is: 

public function preUpdate(PreUpdateEventArgs $args) {
    $entity = $args->getEntity();
    $em = $args->getEntityManager();

    if ($entity instanceof Post) {
        $args->setNewValue('slug', $this->toSlug($entity->getHeading())); // work fine
        $args->setNewValue('category', NULL); // throw an error
        // other code...

My Post entity code is:

/**
 * Post
 *
 * @ORM\Table(name="posts")
 * @ORM\Entity(repositoryClass="BW\BlogBundle\Entity\PostRepository")
 */
class Post
{

    /**
     * @var string
     *
     * @ORM\Column(name="slug", type="string", length=255)
     */
    private $slug;

    /**
     * @var integer
     *
     * @ORM\ManyToOne(targetEntity="\BW\BlogBundle\Entity\Category")
     * @ORM\JoinColumn(name="category_id", referencedColumnName="id")
     */
    private $category;

    // other code

How can I update this Category entity in this EvenetListener together with Post entity like in my example?

This answer work, but only for Post changes. But I also need change some values of Category entity, for example:

$entity->getCategory()->setSlug('some-category-slug'); // changes not apply, nothing happens with Category entity.

Upvotes: 0

Views: 391

Answers (1)

Debflav
Debflav

Reputation: 1151

I guess the method setNewValue only works for a field that has changed. Maybe your category is already NULL. That's why it's throw the error. Here's the sample code from documentation.

 /**
  * Set the new value of this field.
  *
  * @param string $field
  * @param mixed $value
  */
 public function setNewValue($field, $value)
 {
     $this->assertValidField($field);

     $this->entityChangeSet[$field][1] = $value;
 }

 /**
  * Assert the field exists in changeset.
  *
  * @param string $field
  */
 private function assertValidField($field)
 {
     if ( ! isset($this->entityChangeSet[$field])) {
         throw new \InvalidArgumentException(sprintf(
             'Field "%s" is not a valid field of the entity "%s" in PreUpdateEventArgs.',
             $field,
             get_class($this->getEntity())
         ));
     }

Upvotes: 1

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