CI database query error

[eluser]sn4k3[/eluser]

Fatal error: Call to a member function num_rows() on a non-object in D:\wamp\www\licitar\system\application\models\Auction_model.php on line 51

Code:

function BidAuction($id)
{
    if(!$id)return false;
    $fp = fopen("test.txt", 'w');
    fwrite($fp, "asdsads");
    // Check existence and if closed
    $this->db->select('active, closed, currentprice');
    $this->db->join('products', 'products.id = auctions.productid');
    fwrite($fp, "sss");
    $query = $this->db->get_where('auctions', array('id' => $id), 1);
    if ($query->num_rows() == 0)
    {
        $query->free_result();
        return false;
    }
    $row = $query->row_array();
    $query->free_result();
    fwrite($fp, serialize($row));
    if($row['active'] == 0 || $row['closed'] == 1) return NULL;
    $this->_BidAuction($id, $row['currentprice'], $_SESSION['userid'], $_SESSION['username']);
    $_SESSION['bids']--;
    fclose($fp);
    return $row;
}

if i take off "$this->db->join('products', 'products.id = auctions.productid');" it works, but i realy need join tables

i use "$this->db->join('products', 'products.id = auctions.productid');" in other functions and it work well, by do:

Code:

$this->db->limit(1);
if($joinProduct)
    $this->db->join('products', 'products.id = auctions.productid');
$query = $this->db->get_where('auctions', array('id' => $id));

Thanks

[eluser]sn4k3[/eluser]
i found the error, it was my fault

i change:

Code:

$query = $this->db->get_where('auctions', array('id' => $id), 1);

to

Code:

$query = $this->db->get_where('auctions', array('auctions.id' => $id), 1);