Selecione os Widgets que deseja utilizar:

<%= form_tag(visual_condition_builder_save_path, method: :put, class: 'widget_config') do %>

Usuário: <%= select_tag :user_id, options_from_collection_for_select(User.all, :id, :email, current_user.id), include_blank: false, class: 'form-control widget-user-control' %>

Widgets

<%= submit_tag "Salvar", class: 'btn btn-success' %> <% end %>