public function modification(Article $monarticle)
 {
     $requete = $this->_db->prepare('update article set type_id=:typeid , nom=:nom , points=:points , marque=:marque , description=:description where id=:id ');
     $requete->execute(array(':id' => $monarticle->getId(), ':typeid' => $monarticle->getTypeid(), ':nom' => $monarticle->getNom(), ':points' => $monarticle->getPoints(), ':marque' => $monarticle->getMarque(), ':description' => $monarticle->getDescription()));
 }