gistfile1.rb

# == Schema Information
#
# Table name: person_login_logs
#
#  id         :integer(4)      not null, primary key
#  person_id  :integer(4)
#  login      :datetime
#  logout     :datetime
#  created_at :datetime
#  updated_at :datetime
#
# Indexes
#
#  index_person_login_logs_on_person_id  (person_id)
#

class PersonLoginLog < ActiveRecord::Base
  belongs_to :person
  
  def self.logged_at_least_x_times_and_one_of_the_login_was_in_last_y_days(x,y)
    count = 0
    all.group_by{|g| g.person_id}.each do |id,logs|
       count += 1 if logs.size >= x && logs.last.login >= y.days.ago
    end
    puts count
  end
end