From: James Coglan <jcoglan@...>
Date: 2009-04-17T21:06:01+09:00
Subject: Re: simple module method call question

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> This always fails. I've tried every trick I can think of, but always I get
> this:
>
> ../lib/setnet/SN.rb:579:in `proc_command': undefined method `orph_chk' for
> Utils:Module (NoMethodError)
>       from ../lib/setnet/SN.rb:229:in `eval'
>       from ../lib/setnet/SN.rb:579:in `proc_command'
>       from ../lib/setnet/SN.rb:229:in `user_interface'
>       from ../lib/setnet/SN.rb:146:in `manage'
>       from ../lib/setnet/SN.rb:68:in `startup'
>       from ./setnet:28
>
> Can someone suggest why I'm not able to get to this method?
>
> Here's the relevant Module, in abbreviated form:
>
> module Utils
>
>  MENU = [
>  ["orph_chk", "searches nodes and links for references which cannot be
> resolved, and reports them"],
>  ["tree_count","starting with node 'root', locates descendants of each
> node, displaying count at each level"],
>  ["showtree","starting with node 'root', locates and displays descendants
> of each node"],
>  ["tree_orphans","locates links which cannot be traced to the root node,
> and displays them"]
>  ]
>
>  def orph_chk
>   puts 'orph_chk'
>  end
>
> end



You've defined an instance method, not a module method. The method as you
define it will appear in classes that use 'include Utils'. To get a module
method, define it on self:

module Utils
  MENU = [ ... ]

  def self.orph_chk
    # ...
  end
end

--
James Coglan
http://github.com/jcoglan

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