Rails - Jun 2005 - Custom Routes nightmare

Hi all,
I''m new to rails and slowly getting the hang of it. I''ve just
brought
the rails book and got to the section on routes, which obviously I''m
trying out now and just can''t seem to make it work.

The idea was to generate urls like:
http://www.site.com/image/image_name. Rather than: http://www.site.com/show/3

In my routes.rb I have
map.connect ''image/:title'', :controller =>
"admin", :action => "show"

In my controller I have

def show
  @image = Image.find(@params[:id]) #have also tried :title
end

In my view I have rails code which makes the links to other images

<%= link_to image.title, :action => ''show'', :title =>
image.title  %>

I have also tried 

<%= link_to image.title, :action => ''show'', :title =>
@images.title  %>

and <%= url_to :action => ''show'', :title =>
@images.title %>

but neither of these work.

The main error I seem to get is ''cannot find image without
id''.
Now I know this can be done and I thought it looked fairly straight
forward, but I''m really struggling now, any chance of little help?

Kieran

>def show
>  @image = Image.find(@params[:id]) #have also tried :title
>end
>  
>
try

@image = Image.find_by_title(@params[:title] )
or
@image = Image.find(:first, :conditions => ["title = ?",
@params[:title] ])