public function setPreference($user_id, $key, $value)
{
$result = Doctrine_Query::create()->from('Preferences p')->andwhere('p.user_ref = ?', $user_id)->andWhere('p.pref_key = ?', $key)->fetchOne();
if (!$result) {
$result = new Preferences();
$result->fromArray(array('user_ref' => $user_id, 'pref_key' => $key));
}
$result->setPrefValue($value);
$result->save();
return true;
}
