class CreateRailsAdminHistoriesTable < ActiveRecord::Migration def change create_table :rails_admin_histories do |t| t.string :message # title, name, or object_id t.string :username t.integer :item t.string :table t.integer :month, :limit => 2 t.integer :year, :limit => 5 t.timestamps end add_index(:rails_admin_histories, [:item, :table, :month, :year], :name => 'index_rails_admin_histories' ) end end