Api Pagination in Symfony - php

Question

I am working on API, I have a controller that query for results to a framework7 app. (first, last and both). I, however, want to add pagination from API to framework but I have not paginated in Symfony before, what is the best practice?
I tried paginator but there are not many examples of it. Below is my controller function.
public function getEventSessionAttendeeAction(request $request, $eventSessionId)
{
$searchFields = [
'o.email',
'a.email',
'a.firstName',
'a.lastName',
'a.barcode1',
'a.barcode2',
'a.id',
'o.id'
];
/** #var \KCM\ApiBundle\Entity\Api\EventSession $eventSession */
$eventSession = $this->get('doctrine')->getRepository('KCMApiBundle:EventSession')->findOneBy(
[
'id' => $eventSessionId
]
);
/** #var ApiEntity\Event $event */
$event = $eventSession->getEvent();
$childSafe = $event->getChildSafe();
$filter = $request->get('filter');
$match_level = 0;
//Searches by email address
if ( filter_var($filter, FILTER_VALIDATE_EMAIL)) {
$searchFields = [
'a.email'
];
$match_level = 1;
//Searches for first or last name
}elseif(preg_match('/^[a-zA-Z\-]*$/', $filter)){
$searchFields = [
'a.lastName',
'a.firstName'
];
$match_level = 2;
//Searches by barcode
}elseif (preg_match('/^[0-9]+/', $filter)){
if ($childSafe == 2) {
$searchFields = [
'a.barcode3'
];
} else {
$searchFields = [
'a.barcode1'
];
}
$match_level = 4;
}
//Searches for first and last name(must have at least first characters for each
if(preg_match('/^([a-z|A-Z]+)\s{1}([a-z|A-Z]+)/', $filter)){
$match_level = 3;
}elseif (preg_match('/^\s*$/', $filter)){
$match_level = 5;
}
try {
/** #var ApiEntity\EventSession $eventSession */
$em = $this->getDoctrine()->getManager();
$qb = $em->createQueryBuilder();
$qb->select(array('a', 'o'))
->from('KCMApiBundle:EventAttendee', 'a')
->join('a.eventOrder', 'o')
->join('o.event', 'e')
->join('e.eventSessions', 'es')
->where($qb->expr()->andX(
$qb->expr()->eq('es.id', $qb->expr()->literal($eventSessionId))
))
->andWhere('a.sessionCheckedIn = 1');
if ($match_level === 3){
$expr = $qb->expr()->andX();
list($first, $last) = explode(' ', $filter);
$last = $last. '%';
$expr->add($qb->expr()->like('a.lastName', $qb->expr()->literal($last)));
$first = $first. '%';
$expr->add($qb->expr()->like('a.firstName',$qb->expr()->literal($first)));
}elseif ($match_level === 5){
$expr = $qb->expr()->andX();
$paginator = new Paginator($qb);
$paginator->getQuery()
->setFirstResult(0)
->setMaxResults(10);
}else {
$expr = $qb->expr()->orX();
foreach ($searchFields as $field) {
if ($match_level === 1) {
$literalFilter = $filter;
$expr->add($qb->expr()->like($field, $qb->expr()->literal($literalFilter)));
} elseif ($match_level === 2) {
$literalFilter = $filter;
$expr->add($qb->expr()->like($field, $qb->expr()->literal($literalFilter)));
} elseif ($match_level === 4) {
$literalFilter = $filter;
$expr->add($qb->expr()->eq($field, $qb->expr()->literal($literalFilter)));
}
}
}
$qb->andWhere($expr);
$results = $qb->getQuery()->getResult();
if ($results) {
return $this->getApi()->serialize($results);
}
return new Response(null, Response::HTTP_NOT_FOUND);
} catch (\Exception $e) {
$this->get('logger')->error($e->getMessage());
}
}
What I am trying to eventually do is to be able to use this query to paginate to the framework7 app. should I create a new public function to paginate or is there a way to do it within this function?

Answer 1

Did you try to use knppagination bundle?
https://github.com/KnpLabs/KnpPaginatorBundle