Rails: submit (via AJAX) when drop-down option clicked

Question

What is the easiest and most graceful way to auto-submit an AJAX form when a drop-down box\'s option is selected? I\'m creating an administration page where the admin can modify

Answer 1

There are a couple ways to handle this. Certainly the observe field approach is one, but you could also use a simple javascript or a remote_function to do it:

Here is the simple JS approach:

<% remote_form_for membership do |f| %>
    <%= f.select :permissions, [['none', 0], ['admin', 9]], {}, :onchange => 'this.form.submit()' %>
<% end %>

The other way would be something like this, and would eschew the form builder (and this may have a couple syntax errors):

<%= select_tag(:permissions, [['none', 0], ['admin', 9]], {:onchange => "#{remote_function(:url  => permissions_path(:story_id => story,
             :with => "'permission='+value")}"})

Personally I prefer the former.