Getting An Id (Query Builder)

I have a form where I collect "job" data from to insert a new row into a DB table. Two fields are then used to recover a store id from a separate DB table. I'm just wondering if there's a better way to do this kind of stuff. Here's my bit of code, it just feels like there's a better code for this:

Job controller:

		if(isset($_POST['Job']))
		{
			$model->attributes=$_POST['Job'];
            $model->store_id = $test = Job::getStoreId($model->account, $model->store_number);
			if($model->save())
				$this->redirect(array('view','id'=>$model->work_order));
		}

Job model (query to retrieve the ID):

    public static function getStoreId($account, $number)
    {
        $_id = Yii::app()->db->createCommand()
                ->select('id')
                ->from('store')
                ->where('account = :ui_account AND number = :ui_store_number', array(
                    ':ui_account' => $account,
                    ':ui_store_number'  => $number
                ))->queryRow();
        return $_id['id'];
    }