/**
* Gets the type of the primary key field for the object.
*
* @return string The type of the primary key field for this instance.
*/
public function getPKType() {
if ($this->_pktype === null) {
if ($this->_pk === null) {
$this->getPK();
}
$this->_pktype= $this->xpdo->getPKType($this->_class);
}
return $this->_pktype;
}
