small expose

gistfile1.rb

require 'active_support/all'

class Yeah
  def initialize
    @params = {"university_id" => 2, "id" => 3}
  end

  def method_missing(name, *args)
    if name.to_s =~ /^find_([a-z]+)_id$/
      find_id($1)
    else
      super
    end
  end
  
  def find_id(name)
    id = @params["#{name}_id"].presence || @params["id"]

    instance_eval "@#{name} = #{id}"
  end
end

@t = Yeah.new
@t.find_university_id
@t.instance_eval do
  puts "University: #{@university}"
end

@t.find_yeah_id
@t.instance_eval do
  puts "Yeah: #{@yeah}"
end

class YeahController < Yeah
  # before_filter :find_university_id
  
  def index
    find_university_id
    puts "University id is #{@university}"
  end
end

YeahController.new.index