Migration to create a has_and_belongs_to_many join table between the Club model and the People model

clubs_people.rb

class ClubsPeople < ActiveRecord::Migration
  def change
    create_table :clubs_people, :id => false do |t|
      t.references :person, :club
    end

    add_index :clubs_people, [:club_id, :person_id], :unique => true, :name => "by_club_person"
  end
end

correct_join_table_names.rb

class CorrectJoinTableNames < ActiveRecord::Migration
  def up
    rename_table(:people_clubs, :clubs_people)
  end

  def down
    rename_table(:clubs_people, :people_clubs)
  end
end