How to implement Active Record inheritance in Ruby on Rails?

Question

How to implement inheritance with active records?

For example, I want a class Animal, class Dog, and class Cat.

How would the model and the database table ma

Answer 1

Models:

class Animal < ActiveRecord::Base; end
class Dog < Animal; end
class Cat < Animal; end

Migration:

class CreateAnimals < ActiveRecord::Migration
  def self.up
    create_table :animals do |t|
      # Other attributes...
      t.string :type
    end
  end

  def self.down
    drop_table :animals
  end
end