kun niu wrote:
> Hi all,
> I'm a ROR newbie. I'm writing ROR application on Ubuntu 10.04, ruby
> 1.8.7-p249, rails 2.3.5, mongrel 1.1.5. I wrote a controller called
> "admin". 

Okay, that is nice...

> I also defined a function in the corresponding controller
> called "show_admin". 

Not so nice...  Rails works the best and the easiest if you adhere to 
the Rails conventions.  You should start with a basic tutorial somewhere 
and follow it, trying to understand how it all fits.  My favorite way to 
get people started is to tell them to scaffold a basic application, then 
see what the generator created, and understand how it works.  Later, 
worry about an admin, or namespacing.

script/generate scaffold person last_name:string first_name:string

(that creates an initial db migration, controller, and views for a 
person)

rake db:migrate

(create the table)

script/server

Now browse to your app, and add a person or two, noting which link you 
clicked to do what. Now look at the application code AND your log file 
to see how Rails is wired togehter

> But each time I browsed to "http://localhost:3000/
> admins/show_admin". I always get the following error:
> No action responded to show. Actions: index, login, logout, and
> show_admin
> It seemed that ror find my action, But it failed to show the action.

No, that's not correct. Unless you updated your routes.rb file and 
restarted your server, you don't have a 'show_admin' routing. And you 
shouldn't have one, that very un-Railsy.

> On the other hand, it tried to show the "show" action. But I don't
> have such an action. I wonder if anyone here can solve my problem. I
> searched the internet. I found someone said that it might be related
> to the namespacing system. But I can find the detailed description
> since it was a google cache.
> Thanks for any hints or advice in advance.

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