Complex SQL queries

Hey guys,

I've got a controller, which needs to do a complex SQL query:

function view($seatsRequired) {
$this->set('seatavail', $this->Seatavail->query("
SELECT ThtId,ShoId,PerTime,SroID,firstUnused, IF(mincid IS NULL,
IFNULL(did,firstUnused),mincid-1) AS lastUnused
FROM (
SELECT
first.ThtId,first.ShoId,first.PerTime,first.SroID,first.StaID AS
firstUnused, MIN(c.StaID) AS mincid, MAX(d.StaID) AS did
FROM (
SELECT a.ThtId,a.ShoId,a.PerTime,a.SroID,a.StaID
FROM seatavail a
LEFT JOIN seatavail b ON a.StaID=b.StaID + 1 AND a.SroID =
b.SroID
WHERE a.StaStatus=0 AND (b.StaID IS NULL OR b.StaStatus=1)
AND a.ThtID = 500
) AS first
LEFT JOIN seatavail c ON first.StaID<c.StaID AND c.StaStatus=1
AND c.SroID = first.SroID
LEFT JOIN seatavail d ON first.StaID<d.StaID AND d.StaStatus=0
AND d.SroID = first.SroID
GROUP BY firstUnused
) AS seatavail
HAVING lastUnused-firstUnused>=$seatsRequired-1;"
));
$this->set(compact('seatavail'));
$this->detectagent();
}

Now, running the query by hand works as expected and outputs the right
data. However, from within Cake, I get :

Warning (2): get_class() expects parameter 1 to be object, array given
[CORE/cake/libs/xml.php, line 200]
and
Fatal error: Call to undefined method Xml::addAttribute() in /usr/
share/php/cake/libs/xml.php on line 275

Doing the same with a simple query works, so I believe I have the
syntax right.

I can't understand what the problem is, the Seatavail model is generic
enough that it should work:

class Seatavail extends AppModel {

var $name = 'Seatavail';
var $useTable = 'seatavail';
var $primaryKey = 'ThtId';

}

Any pointers?

Kind regards

-- joe.

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