app/views/admin/resource_files/_form.html.erb
<%= simple_form_for([:admin, resource_file]) do |f| %>
<%= f.input :resource_file_type_id, label: 'Type', collection: ResourceFileType.order(:position) %>
<%= f.input :title %>
<%= f.label 'Description', for: :description %>
<%= f.rich_text_area :description %>
<%= f.input :file %>
<%= f.button :submit %>
<% end %>