Persisting other entities inside preUpdate of Doctrine Entity Listener

Question

For clarity I continue here the discussion started here.

Inside a Doctrine Entity Listener, in the preUpdate method (where I have access to both the old and new val

Answer 1

Don't use preUpdate, use onFlush - this allows you to access the UnitOfWork API & you can then persist entities.

E.g. (this is how I do it in 2.3, might be changed in newer versions)

    $this->getEntityManager()->persist($entity);
    $metaData = $this->getEntityManager()->getClassMetadata($className);
    $this->getUnitOfWork()->computeChangeSet($metaData, $entity);