From: matt@... (matt neuburg)
Date: 2006-11-25T04:53:20+09:00
Subject: Re: rubycookbook 15.1 problem

<rajibsukanta@yahoo.co.in> wrote:

> I was following along Lucas's rubycookbook receipe 15.1  for creating a
> ROR application for displaying the o/p of dir command on a windows
> machine onoto a browser.
> 
> my application is named "check" instead of "status" as given in
> receipe.
> 
> my  C:/Documents and
> Settings/ri004902/check/app/controllers/check_controller.rb .. file
> looks as
> ........................................................
> class CheckController < ApplicationController
>   def index
>     time = Time.now
>     @time = time
>     @dr = exec "dir/p"
>   end
> end
> ......................................
> and my C:\Documents and
> Settings\ri004902\check\app\views\check\index.rhtml .. file is
> ...............................................................
> <h1>Directory structure at <%= @time %></h1>
> <p><%= @dr %></p>
> .....................................................
> 
> I start the webbrick and point my brwser to
> http://localhost:3000/check/
> 
> what i get is
> Application error (Rails)
> 
> I tried with @dr= 'dir/p' in index of CheckController .. but in vain.
> 
> could anyone provide me a lead.

This could be irrelevant - I'm on Mac OS X, and there is no "dir"
command there - but OMM the example as printed doesn't work either,
because the single-quotes in the original should be backticks. The
recipe has:

@ps = 'ps aux'

But it should be:

@ps = `ps aux`

Perhaps you should try `dir/p` (whatever that may be) instead of using
exec? Just a guess... m.

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