dev #13296 update getAvailableSessions to findAllBy(select)

library/Class/Formation.php

@@ -82,12 +82,8 @@ class Class_Formation extends Storm_Model_Abstract {
 
 
 	public function getAvailableSessions() {
-		$available_sessions = Class_SessionFormation::findAllBy(['id_formation' => $this->getId()]);
-		return array_filter(array_map(
-													function($session) {
-														return $session->isAvailable() ? $session : '';
-													},
-													$available_sessions));
+		return Class_SessionFormation::findAllBy(['id_formation' => $this->getId(),
+																							'select' => 'isAvailable']);
 	}
 }
 ?>
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