Protomodel

protomodel.rb

# Example of prototyping models with a mix of ActiveRecord and Virtus
#
# Useful with large models where some fields are in flux during spiking/dev
# and you don't want or need to run migrations to try ideas out.

class A < ActiveRecord::Base
  # ...

  # belongs_to
  # has_many

  # ...

  class Proto
    include Virtus

    attribute :amount, Float
    attribute :name, String
    attribute :foo, String
  end

  # helper
  def proto
    @proto ||= Proto.new
  end

  # delegate messages to the proto instance
  def method_missing(method, *args, &block)
    proto.respond_to?(method) ? proto.send(method, *args, &block) : super
  end

  # ensure the model quacks
  def respond_to_missing?(method, include_private = false)
    proto.respond_to?(method, include_private) || super
  end
end