app/models/agency.rb
class Agency < ActiveRecord::Base
has_many :stops
has_many :calculated_stop_times
has_many :trips
has_many :stop_times
has_many :routes
has_many :services
has_many :service_exceptions
has_many :shapes
has_many :shape_points, through: :shapes
def realtime?
gtfs_trip_updates_url.present?
end
end