multi_auth.md

$ rails g model Role name
      invoke  active_record
      create    db/migrate/20151014151416_create_roles.rb
      create    app/models/role.rb
      invoke    test_unit
      create      test/models/role_test.rb
      create      test/fixtures/roles.yml
$ rails g model UserRole user:references role:references
      invoke  active_record
      create    db/migrate/20151014151448_create_user_roles.rb
      create    app/models/user_role.rb
      invoke    test_unit
      create      test/models/user_role_test.rb
      create      test/fixtures/user_roles.yml
$ rake db:migrate

  Role.create(name: "platform_admin")
     (0.0ms)  begin transaction
    SQL (0.3ms)  INSERT INTO "roles" ("created_at", "name", "updated_at") VALUES (?, ?, ?)  [["created_at", "2015-10-14 15:23:08.704450"], ["name", "platform_admin"], ["updated_at", "2015-10-14 15:23:08.704450"]]
     (1.2ms)  commit transaction
  => #<Role id: 1, name: "platform_admin", created_at: "2015-10-14 15:23:08", updated_at: "2015-10-14 15:23:08">
  irb(main):012:0> Role.create(name: "store_admin")
     (0.1ms)  begin transaction
    SQL (0.3ms)  INSERT INTO "roles" ("created_at", "name", "updated_at") VALUES (?, ?, ?)  [["created_at", "2015-10-14 15:23:12.468088"], ["name", "store_admin"], ["updated_at", "2015-10-14 15:23:12.468088"]]
     (1.3ms)  commit transaction
  => #<Role id: 2, name: "store_admin", created_at: "2015-10-14 15:23:12", updated_at: "2015-10-14 15:23:12">
  irb(main):013:0> Role.create(name: "registered_user")
     (0.1ms)  begin transaction
    SQL (0.3ms)  INSERT INTO "roles" ("created_at", "name", "updated_at") VALUES (?, ?, ?)  [["created_at", "2015-10-14 15:23:18.850334"], ["name", "registered_user"], ["updated_at", "2015-10-14 15:23:18.850334"]]
     (1.2ms)  commit transaction
  => #<Role id: 3, name: "registered_user", created_at: "2015-10-14 15:23:18", updated_at: "2015-10-14 15:23:18">