/**
* Batch create entities.
*
* Preserves the keys of the request content array as the keys of the
* response content array. This is helpful for implementations that need to
* map original identifiers to the newly created entity IDs.
*
* There are two outcomes if an exception is thrown during a batch. If
* continueOnError is set to the request, the current entity is thrown away
* but the operation continues. Otherwise, all previously created entities
* are removed.
*
* Detaches entities after they've been created to minimize memory usage.
* Because the entities are detached, this returns resource references
* (containing only the entity ID) instead of full entity representations.
*
* {@inheritDoc}
*/
public function batchCreate(Request $request)
{
$errorStore = new ErrorStore();
$logger = $this->getServiceLocator()->get('Omeka\\Logger');
$entities = [];
foreach ($request->getContent() as $key => $datum) {
$entityClass = $this->getEntityClass();
$entity = new $entityClass();
$subRequest = new Request(Request::CREATE, $request->getResource());
$subRequest->setContent($datum);
try {
$this->hydrateEntity($subRequest, $entity, $errorStore);
} catch (\Exception $e) {
if ($request->continueOnError()) {
$logger->err((string) $e);
continue;
}
// Remove previously persisted entities before re-throwing.
foreach ($entities as $entity) {
$this->getEntityManager()->remove($entity);
}
$this->getEntityManager()->flush();
throw $e;
}
$this->getEntityManager()->persist($entity);
$entities[$key] = $entity;
}
$this->getEntityManager()->flush();
$references = [];
foreach ($entities as $key => $entity) {
$references[$key] = new ResourceReference($entity, $this);
$this->getEntityManager()->detach($entity);
}
return new Response($references);
}
