best_model.rb

class Model < ParentModel
  include Foo::Bar
  extend Bar::Baz

  module InternalModule
    ...
  end

  default_scope :order => 'id ASC'

  belongs_to :foo
  has_one :baz
  has_many :bars
  has_many :maz, :through => :daz
  has_and_belongs_to_many :jaz
  ...


  validates_presence_of :id
  validates_uniqueness_of :id
  validates_inclusion_of :rating, :in => [1..10]
  validates_numericality_of :taz
  ...

  scope :by_name, :order => 'name ASC'

  def self.class_method
  end

  def instance_method
  end

  protected

  def self.class_method
  end

  def instance_method
  end

  private

  def self.class_method
  end

  def instance_method
  end
end