meta modeling in ActiveRecord/ Rails

[mark]

Hi,

I am trying to create a design for user defined tables which could be stored in a database then initialized from a controller as needed. At present I am having a bit of trouble getting these metamodels into the rails env from a controller. Is there a way that I can class_eval a model that would be able to be seen for the duration of that process?

class Admin::UdtManagersController < Admin::Auth #< ApplicationController
  before_filter :initialize_meta_environment

  def index # rails complains if this isn't here
  end

    private

      def initialize_meta_environment
        @table = 'review_processes' #define this hard coded for now... later passed via param
        @model = @table.classify

        init_models
  

      end

      def init_models
        class_eval= %q{
           class #{@model} < ActiveRecord::Base

           validates_presence_of :summary_reviews
           end
          }

       ## How can I eval this model so it will become part of my application for that process?
 
      end
end

Any help is totally appreciated! Thanks in advance.

-Mark

[mark]

Figured this out for nbow... You can do something like...

        model_class = create_arec @table do

            validates_presence_of :summary_reviews

          end

  model = Object.const_set(@table.classify, model_class)

  def create_arec(table_name, &block)

        klass = Class.new(ActiveRecord::Base){self.table_name = table_name}

        klass.class_eval &block

        klass

      end

      def create_acntl(controller_name, super_class = ApplicationController, &block)

        klass = Class.new(super_class)

        klass.class_eval &block

        klass

      end

      def compose_controller(klass, &block)

        klass.class_eval &block

      end

THis will create the objects... still have not got it doing exactly what I want to.

More later perhaps!

hope this helps someone.

--mark