What about on select element use autocomplete?

<%= @topic_view.topic.title %>
<%= @topic_view.topic.average_rating %> <%= @topic_view.topic.posts.count { |p| !!p.custom_fields['rating'] } %>

Like is for input only or works with select tag also?

<input autocomplete="on">

<select autocomplete="off">

Thanks!

Select as well. developer.mozilla.org is a great site to research such questions:

https://developer.mozilla.org/en-US/docs/Web/HTML/Attributes/autocomplete
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/select