Fatal error: Uncaught exception 'MongoException' with message 'Invalid object ID' in D:\ishang\wwwroot\web\application\core\MY_Model.php:34
Stack trace:
#0 D:\ishang\wwwroot\web\application\core\MY_Model.php(34): MongoId->__construct('')
#1 D:\ishang\wwwroot\web\application\controllers\content.php(295): MY_Model->find(Array, 1)
#2 [internal function]: content->index()
#3 D:\ishang\wwwroot\web\system\core\CodeIgniter.php(359): call_user_func_array(Array, Array)
#4 D:\ishang\wwwroot\web\index.php(193): require_once('D:\ishang\wwwro...')
#5 {main}
  thrown in D:\ishang\wwwroot\web\application\core\MY_Model.php on line 34