From: Intransition <transfire@...>
Date: 2011-05-02T03:33:10+09:00
Subject: Re: Wrap external source file in a module



On May 1, 1:55 pm, Alexey Muranov <mura...@math.univ-toulouse.fr>
wrote:
> Hello, i have another question.
>
> I have a strange situation which i have not resolved yet where for some
> reason i have to wrap several classes in a module, otherwise the program
> doesn't work as expected (by me of course).
> Can anybody please tell me the following: is it possible to read class
> definition from another file and wrap them in a module?
>
> Here is an example:
>
> I have several classes defined in a file models.rb:
>
>     class Person
>       ...
>     end
>
>     class Address
>       ...
>     end
>
> I want to load or require this file in another file, say program.rb, so
> that the classes were wrapped together in a module M, like
>
>     module M
>       load "models.rb"
>     end
>
>     p = M::Person.new
>
> but this doesn't work (M::Person is an uninitialized constant, according
> to an error message).
>
> Is there some way to do this?

You need to evaluate the file:

     module M
       module_eval File.read(File.dirname(__FILE__) + '/models.rb')
     end

     p = M::Person.new