Question

The intended URL is

"versions/compare/id1/id2"

Obviously, this doesn’t work, but shows the intention

<%= form_tag("/versions/compare/", :method => "get") do %>
  <% versions.each do |v| %>
    <% v.id == @version.id ? current_class = " current" : "" %>
    <li class="version-list <%= current_class %>">
       <%= check_box_tag(:compare_version, v.id) %>
       <%= link_to v.user.name, version_path(v) %>, 
    </li>
  <% end  %>
  <%= submit_tag("Compare") %>
<% end #form tag
 %>

The code above produces http://localhost:3000/versions/compare/?utf8=%E2%9C%93&compare_version=13&compare_version=12&commit=Compare

Is there a way to modify the form (+ JS?) so that it gets the desired URL?

"versions/compare/id1/id2"

Answer 1

you need to understand how form_tag work, it can not change the url after rendering the document.

If you want to change the url, use jquery to change it.

Or, just submit the form into some other url like

<%= form_tag("/comparing_version")

and then, in the controller, after processing everything, you redirect user to

“versions/compare/id1/id2”