clarion/app/models/event.rb

class Event < ActiveRecord::Base
  validates :title, presence: true
  validates :length, presence: true, numericality: {only_integer: true, greater_than: 0}
  validates :abstract, presence: true
  validates :description, presence: true
  validates :agreement, acceptance: true

  private

  def self.inheritance_column
    'something'
  end
end