fab-manager/db/migrate/20190603150642_create_statistic_profile.rb

class CreateStatisticProfile < ActiveRecord::Migration
  def change
    create_table :statistic_profiles do |t|
      t.boolean :gender
      t.date :birthday
      t.belongs_to :group, index: true, foreign_key: true
      t.belongs_to :user, index: true, foreign_key: true
    end

    add_reference :reservations, :statistic_profile, index: true, foreign_key: true
    add_reference :subscriptions, :statistic_profile, index: true, foreign_key: true
  end
end