Question

i’m trying to create some getters via metaprogramming,but for some reason it does not seems to work. I’m doing this :

RESOURCES = %w(wood stone gold)

class << self
    RESOURCES.each do |resource|
        define_method "#{resource}" do
            resource
        end
    end
end     

Inside a rails application, but i get a wood undefined method, upon executing. Any ideas why ?

(That code is inside a Rails “class City < ActiveRecord::Base” class)

Answer 1

You are defining a class method, not an instance method.

Watch what happens when you try:

City.wood
=> "wood"

Assuming you want it to be an instance method:

RESOURCES = %w(wood stone gold)

RESOURCES.each do |resource|
    define_method "#{resource}" do
        resource
    end
end