Lithium中的可选参数？

I wish to make :offset optional.

Router::connect('/some_page/{:offset}/', ...

So:

Router::connect('/some_page/', ...
Router::connect('/some_page/{:offset}/', ...

Both go to the same route. Is it possible?

First change the order:

Router::connect('/some_page/{:offset}/', ...
Router::connect('/some_page/', ...

Then in the controller just check if the offset is set:

isset($this->request->params['offset'])