class Participant < ActiveRecord::Base include SocialNetworking::Concerns::Participant attr_reader :navigation_status def active_membership_end_date Date.today.advance(weeks: 8) end def active_group self end def active_participants Participant.all end def display_name "display name" end def latest_action_at DateTime.new end def is_admin true end def current_group self end def arm Arm.new end def study_id "participant_study_id" end end