public function get_p2p_id($from, $to)
{
return _p2p_first($this->get_connections(array('from' => $from, 'to' => $to, 'fields' => 'p2p_id')));
}
/**
* Get another post in an ordered connection.
*
* @param int The first end of the connection.
* @param int The second end of the connection.
* @param int The position relative to the first parameter
*
* @return bool|object False on failure, post object on success
*/
public function get_adjacent($from, $to, $which)
{
// The direction needs to be based on the second parameter,
// so that it's consistent with $this->connect( $from, $to ) etc.
$directed = $this->find_direction($to);
if (!$directed) {
return false;
}
$key = $directed->get_orderby_key();
if (!$key) {
return false;
}
$p2p_id = $directed->get_p2p_id($to, $from);
if (!$p2p_id) {
return false;
}
$order = (int) p2p_get_meta($p2p_id, $key, true);
$adjacent = $directed->get_connected($to, array('connected_meta' => array(array('key' => $directed->get_orderby_key(), 'value' => $order + $which))), 'abstract');
return _p2p_first($adjacent->items);
}