- <li><%= link_to "Combine selections into a new collection", '/combine_selected',
- 'data-href' => url_for('/combine_selected?show_project=true'),
+ <li><%= link_to "Combine selected collections into a new collection", '#',
+ 'data-href' => combine_selected_path(
+ action_data: {selection_param: 'project'}.to_json
+ ),
+ 'id' => 'combine_selections_button',