Hi,
as the others quite rightly pointed out you shouldn't use type as a model name in Rails. However, I suspect the error you got wasn't caused by this, but rather by the fact that you were trying to access:
/type/show
instead of say:
/type/show/5
if you look at your controller it will look something like:
def show @type = Type.find(params[:id]) end
params[:id] in your case will be nil (after all you did not specify one, right?) so it will basically try to do Type.find(nil) if you fire up the console, you'll see that this doesn't work.
This is an inelegance of how actions map to controllers, and once you get better and start using map.resources this inelegance will be gone. Just hang in there.
Also I really recommend you put down the Rolling with Rails article and go out and buy the Agile Web Development With Rails (Second Edition!) book. I remember that Rolling with Rails was the first article about Rails I read. The interesting part is that at the time, it was pretty much the ONLY article about Rails. Yes, this was almost two years ago. So buy the book and save yourself some pain.
/Jonas
