how to sort array date wise in cakephp -

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i have 2 table booking , message , want show booking request , message in inbox @ time. 

$this->paginate = array(             'conditions' => $conditions,'limit' =>10,         'order'=>array('booking.created'=>'desc'));     $bookings = $this->paginate('booking');      $this->paginate = array(             'conditions' => $conditions,'limit' =>10,         'order'=>array('messagedetail.created'=>'desc'));     $messages = $this->paginate('messagedetail');

i have merge both table data ( array_merge($bookings, $messages); ) want sort date wise (or conditions)

array ( [0] => array     (         [booking] => array             (                 [id] => 4                 [host_id] => 21                 [place_id] => 10                 [room_id] => 13                 [user_id] => 12                 [message_detail_id] => 16                 [created] => 2013-04-23 14:44:03                 [accept_date] =>                  [cancel_date] =>              )      )  [1] => array     (         [booking] => array             (                 [id] => 3                 [host_id] => 21                 [place_id] => 10                 [room_id] => 13                 [user_id] => 12                 [message_detail_id] => 13                 [created] => 2013-04-15 14:10:59                 [accept_date] => 2013-04-15 14:40:47                 [cancel_date] =>              )      )   [2] => array     (         [messagedetail] => array             (                 [id] => 17                 [message_id] => 2                 [user_id] => 12                 [sender_id] => 21                 [unread] => 0                 [created] => 2013-04-24 12:11:47             )      )  [3] => array     (         [messagedetail] => array             (                 [id] => 15                 [message_id] => 2                 [user_id] => 12                 [sender_id] => 21                 [booking_id] => 3                 [unread] => 0                 [created] => 2013-04-15 15:01:12             )      )    )

thanks in advance.

option #1: create third model named "bookingandmessage". use model's aftersave method (on both booking , message) create duplicate record in new model. query bookingandmessage in proper sort order.

option #2: solve problem, stands, want use php's usort function (also explained here php sort multidimensional array element containing date).

<?php  $bookingsandmessages = array_merge($bookings, $messages);  function date_compare($a, $b) {       $modelkeya = array_key_exists('booking',$a) ? 'booking' : 'messagedetail';    $modelkeyb = array_key_exists('booking',$b) ? 'booking' : 'messagedetail';    $t1 = strtotime($a[$modelkeya]['created']);    $t2 = strtotime($b[$modelkeyb]['created']);    return $t1 - $t2; }  usort($bookingsandmessages, 'date_compare'); // sort merged records `created` date ?>

the downside option 2 is, going have create rules each field (and sort direction).


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