<%= simple_form_for @search do |f| %> <%= hidden_field_tag :folder, params[:folder] %> <%= f.input :title_contains, :required => false %> <%= f.input :body_contains, :required => false %> <%= f.input :to_name_equals, :required => false %> <%= f.input :from_name_equals, :required => false %> <%= f.button :submit %> <% end %>