Node::isUniquePerType PHP Method

    public function isUniquePerType($fields, $or = true)
    {
        if (!is_array($fields)) {
            $fields = func_get_args();
            if (is_bool($fields[count($fields) - 1])) {
                $or = $fields[count($fields) - 1];
                unset($fields[count($fields) - 1]);
            }
        }
        foreach ($fields as $field => $value) {
            if (is_numeric($field)) {
                unset($fields[$field]);
                $field = $value;
                if (isset($this->data[$this->alias][$field])) {
                    $value = $this->data[$this->alias][$field];
                } else {
                    $value = null;
                }
            }
            if (strpos($field, '.') === false) {
                unset($fields[$field]);
                $fields[$this->alias . '.' . $field] = $value;
            }
        }
        if ($or) {
            $fields = array('or' => $fields);
        }
        if (!empty($this->id)) {
            $fields[$this->alias . '.' . $this->primaryKey . ' !='] = $this->id;
        }
        if (!empty($this->type)) {
            $fields[$this->alias . '.type'] = $this->type;
        }
        return $this->find('count', array('conditions' => $fields, 'recursive' => -1)) == 0;
    }