private function insert()
 {
     $this->error = false;
     $this->msg = false;
     $this->v = array('_name' => '', '_resume' => '');
     if (isset($_POST['service-form']) && $_POST['service-form']) {
         $requires = array('_name', '_resume');
         $values = $this->sanitize_fields($_POST, $requires);
         if (!$values) {
             $this->error = 'Preencha todos os campos! ';
         }
     }
     if (isset($values) && $values) {
         $values['_register_date'] = date('Y-m-d');
         $service = new Model_service();
         $result = $service->insert_service($values);
         if (!$result) {
             $this->error = 'Erro ao cadastrar serviço. Tente novamente! ';
             $this->v = array('_name' => $values['_name'], '_resume' => $values['_resume']);
         } else {
             $this->services = $service->get_services();
             if (isset($service->error)) {
                 $this->error = $service->error;
             }
             include_once 'view/view-service.php';
             exit;
         }
     }
     if (isset($service->error)) {
         $this->error .= $service->error;
     }
     include_once "view/service-insert.php";
 }