/**
* Outputs serialized entities
*
* @param Request $request
*/
protected function export(Request $request)
{
$iterator = $this->queryGenerator->createQueryBuilder($request, $this->configuration->getName())->getQuery()->iterate();
$headersSent = false;
$manager = $this->doctrine->getManagerForClass($this->configuration->getEntityClass());
foreach ($iterator as $index => $item) {
if (!count($item[0])) {
continue;
}
$norm = $this->serializer->normalize($item[0], $this->options['serializer_format'], $this->options['serializer_context']);
if (!$headersSent) {
echo $this->serializer->encode(array_keys($norm), $this->options['serializer_format'], $this->options['serializer_context']);
$headersSent = true;
}
echo $this->serializer->encode($norm, $this->options['serializer_format'], $this->options['serializer_context']);
flush();
if (0 === ($index + 100) % $this->options['batch_size']) {
$manager->clear();
}
}
}
/**
* {@inheritdoc}
*/
protected function getTemplateVars(Request $request, FormInterface $form)
{
return ['objectCount' => $this->queryGenerator->getCount($request, $this->configuration->getName()), 'formAction' => $this->getActionUrl($this->getType(), $form->getData(), $this->getGridUrlParameters($request))] + parent::getTemplateVars($request, $form);
}