From: Jeff Barczewski <jeff.barczewski@...>
Date: 2007-02-07T04:29:46+09:00
Subject: Best way to do dynamic mixin or dynamic include? (Mixin module name is defined and included at runtime)

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I am searching for the best way to do a dynamic mixin with Ruby.

Basically I have a class that includes a mixin but I want the mixin module
name to be driven from configuration and not the code.

class A
  include Foo
end


but instead of Foo being constant module name, I would this to be driven off
of a configuration value. (I'm not too worried about the module being loaded
previously that is easily taken care of, so primarily just wanting to know
the best way to do a dynamic include).

Any opinions on the best way to accomplish this?


A very simple way to approach this might be something like

ModToInclude = 'Foo'

class A
  eval( "include #{ModToInclude}" )
end


Any better ideas?


Thanks in advance,

Jeff

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