ridiculous

ridiculous.rb

require "active_support/all"
require "active_model/naming"

class SuperFoo
  A_CONSTANT = 3.14

  def greet
    puts "Hi! + #{A_CONSTANT}"
  end

  def self.class_method
    puts "This is a class method"
  end
end

module ClassWrapper
  def self.extended(base)
    base.class_eval do
      alias_method :class_without_wrapper, :class
      alias_method :class, :class_with_wrapper
    end
  end

  def class_with_wrapper
    @_class_with_wrapper ||= ClassWrapper.const_set class_without_wrapper.name, Class.new(class_without_wrapper) {
      class << self
        def name
          super.gsub("ClassWrapper::", "")
        end
        alias_method :to_s, :name
      end
    }
  end
end

x = SuperFoo.new
y = SuperFoo.new
y.extend ClassWrapper
y.class.extend ActiveModel::Naming

#instance methods work
x.greet
y.greet

#class methods work
x.class.class_method
y.class.class_method

#Name works (with the wrapper though)
puts y.class.model_name
puts x.class.model_name

# ~> -:51:in `<main>': undefined method `model_name' for SuperFoo:Class (NoMethodError)
# >> Hi! + 3.14
# >> Hi! + 3.14
# >> This is a class method
# >> This is a class method
# >> SuperFoo