how to match /posts/123

I have a postscontroller, with a show method:

def show


I want to match the following url pattern to this controller action:


Shoudl go to the postscontroller, show method with id=123

Have a read of this:

It explains all about the rails routing system.

As I guess that you are a beginner with Rails I suggest that you work through a good tutorial on Rails so that you will understand the basic principles. is good and is free to use online. Make sure that any tutorial you try is for rails 3 and make sure you install the exact version of rails that the tutorial is based on.