app/models/activity_timing.rb
# == Schema Information
#
# Table name: activity_timings
#
# created_at :datetime not null
# id :bigint(8) not null, primary key
# include_lower :boolean default(FALSE)
# name :string not null
# position :integer default(0)
# updated_at :datetime not null
#
class ActivityTiming < ApplicationRecord
has_and_belongs_to_many :activity_types, join_table: :activity_type_timings
end