Rails - Apr 2006 - Module and Model

I am getting the following error

/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/base.rb:1129:in
`method_missing'': undefined method `directory?'' for
Msg::File:Class
(NoMethodError)

I have a model called Msg::File in models/msg/file.rb, and I have a file 
in lib/msg/helper.rb which references to both Msg::File and 
File.directory?

How do I help activerecord to use the system File instead of my 
activerecord object Msg::File?

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I might be way off here (i''ve only had to do that kind of thing once)
but try ::File.directory?

Cheers,
Dan

Hi Dan,

Thanks for the suggestion. Unfortunately, same error.

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Hi Thomas,

you''ve got me wondering whether you''ve correctly defined your
Msg::File class....

in msg/file.rb does it look like this?

class Msg::File < ActiveRecord::Base
end

or this?

module Msg
   class File < ActiveRecord::Base
   end
end

Either of those ought to work.

Regards,
Trevor
--
Trevor Squires
http://somethinglearned.com



On 18-Apr-06, at 9:12 PM, Thomas Kwan wrote:
> Hi Dan,
>
> Thanks for the suggestion. Unfortunately, same error.
>
> -- 
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails

Trevor,

I have my class defined as

  class Msg::File < ActiveRecord::Base
    set_table_name "msg_files"
  end

I remember I''ve read from somewhere that the model name (i.e. File)
cannot be the same as the module name of your controller. I saw
that happened before. But in this case, this model name is the
same as one of the module name of a system library.

-- 
Posted via http://www.ruby-forum.com/.

Hey,

On 18-Apr-06, at 11:05 PM, Thomas Kwan wrote:
> Trevor,
>
> I have my class defined as
>
>   class Msg::File < ActiveRecord::Base
>     set_table_name "msg_files"
>   end
>
I tried this out here (rails 1.1) and in the console it works fine  
for me in the console:

|>> Msg::File.new
|=> #<Msg::File:0x2213650 @new_record=true,
@attributes={"name"=>""}>
|>> File.directory? ''/tmp/''
|=> true
>
> I remember I''ve read from somewhere that the model name (i.e.
File)
> cannot be the same as the module name of your controller. I saw
> that happened before. But in this case, this model name is the
> same as one of the module name of a system library.
>
The controller-vs-model name clashes shouldn''t be the issue here.

I know it''s already been suggested but my instinct is to think
you''ve
got a bit
of code that''s interpreting a bare ''File'' as
''Msg::File'' when you
really mean ''::File''.

Check each line of the backtrace to make sure you haven''t missed  
something.

Trev

--
Trevor Squires
http://somethinglearned.com

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Trevor,

I am on rails 1.1 also. I can reproduce the problem by doing the 
following:

- Create app/models/msg/file.rb

  class Msg::File < ActiveRecord::Base
    set_table_name "msg_files"
  end

- Create app/lib/msg/my_helper.rb

  require ''msg/file''
  module Msg
    class MyHelper

      def initialize()
      end

      def reproduce_error
         Msg::File.new
         File.directory? ''tmp''
      end

    end
  end

- Create app/script/driver.rb

  require ''msg/my_helper''

  helper = Msg::MyHelper.new
  helper.reproduce_error

Thanks

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Hi Thomas,

change your code as follows:

def reproduce_error
   Msg::File.new
   ::File.directory? ''/tmp''
end

Any code that lives in the Msg module *must* use the fully qualified  
name
for ::File or Msg::File to avoid clashes.

Let me know how you get on,
Trevor
--
Trevor Squires
http://somethinglearned.com


On 19-Apr-06, at 7:37 AM, Thomas Kwan wrote:
> Trevor,
>
> I am on rails 1.1 also. I can reproduce the problem by doing the
> following:
>
> - Create app/models/msg/file.rb
>
>   class Msg::File < ActiveRecord::Base
>     set_table_name "msg_files"
>   end
>
> - Create app/lib/msg/my_helper.rb
>
>   require ''msg/file''
>   module Msg
>     class MyHelper
>
>       def initialize()
>       end
>
>       def reproduce_error
>          Msg::File.new
>          File.directory? ''tmp''
>       end
>
>     end
>   end
>
> - Create app/script/driver.rb
>
>   require ''msg/my_helper''
>
>   helper = Msg::MyHelper.new
>   helper.reproduce_error
>
> Thanks
>
> -- 
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails

Trevor,

Yes, that works.That was also suggested by Dan. It wasnt working when I 
tried this earlier on. Thanks to both of you!

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