public function copyfrom($key, $fields = null) {
		$f3 = \Base::instance();
		$srcfields = is_array($key) ? $key : $f3->get($key);
		if ($fields)
			if (is_callable($fields))
				$srcfields = $fields($srcfields);
			else {
				if (is_string($fields))
					$fields = $f3->split($fields);
				$srcfields = array_intersect_key($srcfields, array_flip($fields));
			}
		foreach ($srcfields as $key => $val) {
			if (isset($this->fieldConf[$key]) && isset($this->fieldConf[$key]['type'])) {
				if ($this->fieldConf[$key]['type'] == self::DT_JSON && is_string($val))
					$val = json_decode($val);
				elseif ($this->fieldConf[$key]['type'] == self::DT_SERIALIZED && is_string($val))
					$val = unserialize($val);
			}
			$this->set($key, $val);
		}
	}