Question

In my view, I have the following:

<%= select("event", :event_id, events_ids_titles_hash, { :include_blank => true, :onchange => "alert_me_test()" }) %>

alert_me_test() is:

<script type="text/javascript">
  function alert_me_test()
  {
      alert ("this is a test")
  }
</script>

The dropdown is appearing fine, but when I select from it, nothing happens. I’m expecting an alert box with “this is a test” in it.

The Edit case:

When I’m doing an edit, I have the following code:

<% if @panel.event_id %>
  <%= select("panel", :event_id, events_ids_titles_hash, {:selected => @panel.event_id}, { :include_blank => true}) %>

My IDE (RubyMine) does not want to accept the “onchange” as an additional argument, and putting it inside one of the :selected or :include_blank argument hashes does not produce an error, but it does not work either

What ended up working for both new and edit:

<% if @panel.event_id %>
    <%= 'Event is ' + events_ids_titles_hash.key(@panel.event_id) %>
    <%= select("panel", :event_id, events_ids_titles_hash, {:selected => @panel.event_id}, { :include_blank => true, :onchange => "alert_me_test()"}) %>
<% else %>
    <%= 'Select Event from list' %>
    <%= select("event", :event_id, events_ids_titles_hash, { :include_blank => true }, { :onchange => "alert_me_test()" }) %>
<% end %>

Answer 1

<%= select("event", :event_id, events_ids_titles_hash, { :include_blank => true, :onchange => "alert_me_test()" }) %>

Worked for me, but I must say that you are fighting against the current with this one. Rails follows UJS, which means your even handlers should be separate from your HTML. In this case the select would be the same minus the onclick and then the script would be

<script type="text/javascript">
  $('select').change(alert_me_test);

  function alert_me_test(){
  ...
  }
</script>

You don’t have to do things this way, but it makes it clearer when looking at a script where your event calls are coming from.