SonataAdminBundle - check changes in `preUpdate` hook

Question

Is it possible to check if field was changed on preUpdate hook? I\'m looking for something like preUpdate hasChangedField($fieldName) Doctrine functionality. An

Answer 1

This question is a bit similar to this one

Your solution is just to compare the field of the old object with the new one and see where it differs.

So for example:

public function preUpdate($newObject)
{
    $em = $this->getModelManager()->getEntityManager($this->getClass());
    $originalObject = $em->getUnitOfWork()->getOriginalEntityData($newObject);

    if ($newObject->getSomeField() !== $originalObject['fieldName']) {
        // Field has been changed
    }
}

Answer 2

For me the best approach is this in Sonata Admin:

$newField = $this->getForm()->get('field')->getData();
$oldField = $this->getForm()->get('field')->getConfig()->getData();

You shouldn't use unit of work unless there is no option. Also, if you have a not mapped field, you can't access it by entity object.

In a normal Doctrine lyfe cycle event, the best option is Doctrine preupdate event doc