convert doctrine resultset to json from findby query using zend json - php

Question

I've seend much assistance for everything BUT transforming data when using the findBy query.
What I want is a json string of the resulset from this query ensuring that the objects are serialized so i can use this somewhere else:
$posts = $entityManager->getRepository(\Application\Entity\Post::class)
->findBy(['status'=>\Application\Entity\Post::STATUS_PUBLISHED],
['dateCreated'=>'DESC']);
Json::encode($posts,true) from Zend Framework Json but the data is not showing up when i do this.
The result will be a json encoded string with the entity objects that i can pass somewhere else
I will use for the decoding:
\Zend\Json\Decoder::decode($posts,\Zend\Json\Json::TYPE_OBJECT)
UNLESS I should be using \Zend\Json\Json::TYPE_ARRAY)

Answer 1

Here is the way I do it :
include : use Zend\Json\Json;
here is my example of function / action :
public function getListAction(){
$request = $this->getRequest();
if($request->isPost()){
// recuperer le produit choisi :
$element = $request->getPost("element");
$result = null;
$result = $this->getEntityManager()->getRepository('Application\Entity\Element')->findBy(array('etat' => 'valide' , 'pkElement' => $element));
$champs = array();
$i = 0;
foreach ($result as $value) {
$champs[$i] = array("id"=>$value->getPkElement() , "nom"=>$value->getNom());
$i++;
}
$data = array(
'result' => true,
'data' => $champs
);
return $this->getResponse()->setContent(Json::encode($data));
}
}
Then the call in the view.phtml :
$.post('/application/controller_name/getList', {element: $("select[name=element]").val()}, function(result) {
var options = $("select[name=element]");
var obj = JSON.parse(result);
var data = obj.data;
var selected = "";
options.empty();
for (var i = 0; i < data.length; i++) {
options.append($("<option />").val(data[i]['id']).text(data[i]['nom']));
}
});
Hope it helps.