我有几个扩展rails_admin的插件，但这些操作不会出现在我的路由
中Routes for RailsAdmin::Engine:
dashboard GET / rails_admin/main#dashboard
index GET|POST /:model_name(.:format) rails_admin/main#index
new GET|POST /:model_name/new(.:format) rails_admin/main#new
export GET|POST /:model_name/export(.:format) rails_admin/main#export
bulk_delete POST|DELETE /:model_name/bulk_delete(.:format) rails_admin/main#bulk_delete
history_index GET /:model_name/history(.:format) rails_admin/main#history_index
bulk_action POST /:model_name/bulk_action(.:format) rails_admin/main#bulk_action
show GET /:model_name/:id(.:format) rails_admin/main#show
edit GET|PUT /:model_name/:id/edit(.:format) rails_admin/main#edit
delete GET|DELETE /:model_name/:id/delete(.:format) rails_admin/main#delete
history_show GET /:model_name/:id/history(.:format) rails_admin/main#history_show
show_in_app GET /:model_name/:id/show_in_app(.:format) rails_admin/main#show_in_app
为什么？