class CreateJoinTableVolunteerVolunteerTeam < ActiveRecord::Migration[4.2] def change create_join_table :volunteers, :volunteer_teams do |t| t.index [:volunteer_id, :volunteer_team_id], name: 'volunteer_id_volunteer_team_id' t.index [:volunteer_team_id, :volunteer_id], name: 'volunteer_team_id_volunteer_id' end end end