Search all entities Symfony2 - php

Question

I'm working on a webapplication in Symfony2. At the moment I have several pages that include a search form where you can search for specific entities that belong to that page.
For example; I have a client page with an overview of client information. Here you can search for clients with a name like your search value. Thats no rocket science I guess.
At the front page I want to somehow search all my entities at once. I was thinking about combining the searches I already have, or maybe there is a function in Symfony that allows this?
Here's some of my code for the search(es) I have so far:
Live search action for clients:
public function liveSearchAction(Request $request)
{
$string = $this->getRequest()->request->get('sQuery');
$clients = $this->getDoctrine()
->getRepository('clientsBundle:client')
->findByLetters($string);
$response = new JsonResponse(array('clients' => $clients));
$response->headers->set('Content-Type', 'application/json');
return $response;
}
The repository function findByLetters:
public function findByLetters($string){
$query = $this->getEntityManager()
->createQuery(
'SELECT c FROM clientsBundle:client c
WHERE c.name LIKE :string'
)->setParameter('string', '%'.$string.'%');
$result = $query->getArrayResult();
return $result;
}
The AJAX call for returning searchresults
(function($, Handlebars, window, document, undefined) {
var that = this;
var oXHR;
var source = $("#searchResult").html();
var template = Handlebars.compile(source);
var action = $('#quickSearch').data('action');
var route = $('#quickSearch').data('route');
Handlebars.registerHelper('url', function(options) {
console.log(this, options);
return new Handlebars.SafeString(
Routing.generate(route, {'id': this.id})
);
});
$('#quickSearch').on('input',function() {
var $this = $(this);
var searchText = $this.val();
console.log('searching for: ' + searchText);
if (typeof oXHR !== 'undefined') {
oXHR.abort();
}
oXHR = $.ajax({
type: "POST",
url: action,
dataType: "json",
data: {
sQuery : searchText
},
success: function(response)
{
var html = template(response);
// console.log(html);
$('#list .list-group').html(html);
},
error: function(failresponse)
{
console.log( failresponse );
}
});
});
}).call(window.Test = window.Test || {}, jQuery, Handlebars, window, document);
As you might have noticed, the return of the AJAX call gets handled by handlebars.