public function save($throwIfInvalid = true)
{
//check to see if the triple already exists, from the same user
if (empty($this->user_id)) {
$currentUser = current_user();
$this->user_id = $currentUser->id;
}
$count = $this->getTable()->count(array('subject_id' => $this->subject_id, 'object_id' => $this->object_id, 'user_id' => $this->user_id, 'subject_record_type' => $this->subject_record_type, 'object_record_type' => $this->object_record_type, 'property_id' => $this->property_id));
if ($count == 0) {
parent::save();
}
}
