grouped-collection-select

问题 Is it possible to somehow use the :selected option that you'd use on a normal select view helper with the grouped_collection_select function? I'd like to set the value that gets pre-selected in my list. I've tried passing in :selected as an option with no luck! Here's some code snippts of my tests: grouped_collection_select 'user[subscription_attributes]', :subscription_plan_id, Trade.order(:name).all, :subscription_plans, :name, :id, :display_name, { :include_blank => true, :selected => 5 }

问题 I finally figured out how to implement Dynamic Select menus using this tutorial. Everything works, But how does one organize the Cities in the Dropdown by Name.... Below is all of the code I've written. (Please let me know if you need any further information) New to rails please help :) VIEWS <%= simple_form_for ([@book, @rating]) do |f| %> <div class="field"> <%= f.collection_select :state_id, State.order(:name), :id, :name, {:include_blank=> "Select a State"}, {:class=>'dropdown'} %> </div>