chair.rb

class Chair < ActiveRecord::Base
  belongs_to :person
  belongs_to :location
  has_one :result
  has_many :reports, :through=>:result

  scope :with_active_viewed_report, joins(:report).where(:reports => {:active  => 1, :viewed  => 1})
  scope :user_allowed, lambda { |user| where(:person_id => user.permission_owner_ids) }

  # TODO: Remove location references; they aren't needed
  def self.get_home_page_data(location, user)
    user_allowed(user).with_active_viewed_report
  end
end

user.rb

class User < ActiveRecord:Base

  def permission_owner_ids
    chair_permissions.collect(&:owner_id)
  end

end