Modify data before pagination in CakePhp - php

Question

I'm trying to create an Api using cakephp.
I generate a json on server and it works fine , but I tired to use pagination and I got a problem.
in the first case I take the image's path and I encode it to base64 and I generate json => works
in the second case I defined the pagination by the limits and the max and I kept the same code but as a result the image field is still the path from the database and it's not encoded
this my code in my controller :
class PilotsController extends AppController {
public $paginate = [
'page' => 1,
'limit' => 5,
'maxLimit' => 5
];
public function initialize() {
parent::initialize();
$this->loadComponent('Paginator');
$this->Auth->allow(['add','edit','delete','view','count']);
}
public function view($id) {
$pilot = $this->Pilots->find()->where(['Pilots.account_id' => $id], [
'contain' => ['Accounts', 'Pilotlogs']
]);
foreach ($pilot as $obj) {
if ($obj->image_pilot!= NULL) {
$image1 = file_get_contents(WWW_ROOT.$obj->image_pilot);
$obj->image_pilot = base64_encode($image1);
}
}
$this->set('pilot', $this->paginate($pilot));
$this->set('_serialize', ['pilot']);
}
}
If I remove the pagination from the code it works fine . Any idea how to fix it ??

Answer 1

I'd suggest to use a result formatter instead, ie Query::formatResults().
So you'll have something like this :
public function view($id) {
$pilot = $this->Pilots->find()
->where(['Pilots.account_id' => $id], [
'contain' => ['Accounts', 'Pilotlogs']]);
->formatResults(function($results) {
return $results->map(function($row) {
$image1 = file_get_contents(WWW_ROOT.$row['image_pilot']);
$row['image_pilot'] = base64_encode($image1);
return $row;
});
});
}

Answer 2

You can simply first paginate the data and then get the array values and after that modify that data as you want. Check this
public function view($id) {
$pilot = $this->Pilots->find()->where(['Pilots.account_id' => $id], [
'contain' => ['Accounts', 'Pilotlogs']
]);
$pilot = $this->paginate($pilot);
$pilot = $pilot->toArray();
foreach ($pilot as $obj) {
if ($obj->image_pilot!= NULL) {
$image1 = file_get_contents(WWW_ROOT.$obj->image_pilot);
$obj->image_pilot = base64_encode($image1);
}
}
$this->set('pilot', $pilot);
$this->set('_serialize', ['pilot']);
}