exception - Doctrine, Zend, Entity QueryException has no field or association named -

i'm having orderentity. first time needed 3 properties table. need 2 more. i'm adding 2 properties entity:

namespace stock\entity;  use doctrine\orm\mapping orm;  /**  * @orm\entity  * @orm\table(name="orders")  */ class orderentity { /**   * @orm\id   * @orm\column(type="integer", name="orders_id")  */ private $ordersid;  /**  * @orm\column(type="string", name="order_number")   */ private $ordernumber;  /**  * @orm\column(type="integer", name="stores_id") */ private $storesid;  /**  * @orm\column(type="string", length=3, name="currency") */ private $currency;  /**  * @orm\column(type="decimal", precision=6, scale=14, name="currency_value") */ private $currencyvalue;   public function getordersid() {     return $this->ordersid; }  public function setordersid($ordersid) {     $this->ordersid = $ordersid; }  public function getordernumber() {     return $this->ordernumber; }  public function setordernumber($ordernumber) {     $this->ordernumber = $ordernumber; }  public function getstoresid() {     return $this->storesid; }  public function setstoresid($storesid) {     $this->storesid = $storesid; }  public function getcurrency()  {     return $this->currency; }  public function getcurrencyvalue()  {     return $this->currencyvalue; }  public function setcurrency($currency)  {     $this->currency = $currency;     return $this; }  public function setcurrencyvalue($currencyvalue)  {     $this->currencyvalue = $currencyvalue;     return $this; } 

the new properties currency , currencyvalue.

$query = $this->getem()->createquery(             "select o.ordersid, o.currency "             . "stock\entity\orderentity o "             . "o.ordersid ='".$orderid."'"         ); 

if want create query using newer properties got queryexception:

[semantical error] line 0, col 21 near 'currency from': error: class     stock\entity\orderentity has no field or association named currency 

i don't understand problem is!