How to create ActiveRecord tableless Model in Rails 3

Question

I am trying to create a Active Record tableless Model. My user.rb looks like this

class User < ActiveRecord::Base

  class_inheritable_accessor :columns

         


        

Answer 1

As mentioned by stephenmurdoch in rails 3.0+ you can use the method outlined in railscasts 219

I had to make a slight modification to get this to work:

class Message
  include ActiveModel::Validations
  include ActiveModel::Conversion
  extend ActiveModel::Naming

  attr_accessor :name, :email, :content

  validates_presence_of :name
  validates_format_of :email, :with => /^[-a-z0-9_+\.]+\@([-a-z0-9]+\.)+[a-z0-9]{2,4}$/i
  validates_length_of :content, :maximum => 500

  def initialize(attributes = {})
    unless attributes.nil?
      attributes.each do |name, value|
        send("#{name}=", value)
      end
    end
  end

  def persisted?
    false
  end
end