A closer look at Ruby objects

gistfile1.txt

class Student < User

  has_many :class_groups

  def high_achiever?
    average_score > 75
  end

end

class User < ActiveRecord::Base

  include SchoolMember::InstanceMethods
  extend SchoolMember::ClassMethods

  attr_accessor :new_registration

  def self.banned
    where(banned: true)
  end

  def name
    @name ||= "#{first_name} #{last_name}"
  end

  def based_in_uk?
    country == 'UK'
  end

end

module SchoolMember
  module InstanceMethods
    def has_parking_permit?
      ParkingPermit.where(user_id: id).any?
    end
  end
end

module SchoolMember
  module ClassMethods
    def unassigned
      where(class_count: 0)
    end
  end
end

student = Student.first

def student.debug
  puts student.attributes
end