relationships.rb

  def self.get_superiors_of(user)
    superiors = Array.new
    return superiors if user.departament.nil?
    case user.is_chief
    when true
      unless user.departament.parent.nil?
        superiors = user.departament.parent.users.chiefs.to_a
      end
    when false
      if user.departament.users.chiefs.to_a.count > 0
        superiors = user.departament.users.chiefs.to_a
      else
        unless user.departament.parent.nil?
          superiors = user.departament.parent.users.chiefs.to_a
        end
      end
    end
    superiors
  end