public static function rechargerUserProjet($usersprojets, Doctrine_Connection $conn = null)
 {
     $conn->execute("TRUNCATE TABLE ei_project_user");
     //On vide la table pour purger les utilisateurs
     $userprojet = $usersprojets->getElementsByTagName("user_projet");
     if ($userprojet->length > 0) {
         //s'il ya au moins une balise trouvé
         $stmt = $conn->prepare("INSERT INTO ei_project_user (project_id, user_id, project_ref,user_ref,role) " . "VALUES (:project_id, :user_id, :project_ref,:user_ref,:role) " . "ON DUPLICATE KEY UPDATE project_id=project_id,user_id=user_id,project_ref=project_ref,user_ref=user_ref,role=:role");
         foreach ($userprojet as $u) {
             $project_id = $u->getAttribute("project_id");
             $user_id = $u->getAttribute("user_id");
             $project_ref = $u->getAttribute("project_ref");
             $user_ref = $u->getAttribute("user_ref");
             $role = $u->getElementsByTagName("role")->item(0)->nodeValue;
             //recherche du projet en base
             if ($project_id != null && $project_ref != null) {
                 $q = Doctrine_Core::getTable('EiProjet')->findOneByProjectIdAndRefId($project_id, $project_ref);
                 if ($q && $q != null) {
                     //si le projet existe
                     $stmt->bindValue("project_id", $project_id);
                     $stmt->bindValue("user_id", $user_id);
                     $stmt->bindValue("project_ref", $project_ref);
                     $stmt->bindValue("user_ref", $user_ref);
                     $stmt->bindValue("role", $role);
                     $stmt->execute(array());
                 }
             }
         }
     }
 }