config/initializers/tramway.rb in tramway-event-0.4.1 vs config/initializers/tramway.rb in tramway-event-0.5

@@ -1,3 +1,6 @@
-::Tramway::Admin.set_available_models(::Tramway::Event::Event, project: :event)
+::Tramway::Admin.set_available_models(::Tramway::Event::Event,
+                                      ::Tramway::Event::ParticipantFormField,
+                                      ::Tramway::Event::Participant,
+                                      project: :event)