From: Tom Cloyd <tomcloyd@...>
Date: 2009-04-17T23:39:32+09:00
Subject: Re: simple module method call question

James Coglan wrote:
>> 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
>
>   
Well. Live and learn. Very simple solution, but I sure wasn't looking in 
THAT corner of the universe.

Thank you very much.

t.

-- 

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Tom Cloyd, MS MA, LMHC - Private practice Psychotherapist
Bellingham, Washington, U.S.A: (360) 920-1226
<< tc@tomcloyd.com >> (email)
<< TomCloyd.com >> (website) 
<< sleightmind.wordpress.com >> (mental health weblog)
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