Rails - May 2008 - radio button observe field only triggers once

Hi,

If i add field observers to radio button fields they trigger once but
then nothing after that.  I have multiple fields in a form that i need
to know if one of them changes and which spedific field.  Below is an
example of two foelds i tested and they trigger once with the alert but
then nothing after that. I also tried individual observers for each
field test_yes and test_no but with the same issue.


<%= radio_button_tag ''test'', "yes" %>
<%= radio_button_tag ''test'', "no" %>


<%= observe_field(''test'',
                  :on => ''click'',
                  :function => "alert(''Element Yes
changed'')"%>

Does anyone know why or experienced something like this before?

JB
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If I remember correctly, I think you''ll need an id on each radio
button and need to observe each radio button individually.  The
''grouping'' of the radio buttons into a single field value
that''s
posted back does not replace the fact that it''s actually a collection
of individual html elements on the form.

On May 16, 4:07 pm, John Butler
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:
> Hi,
>
> If i add field observers to radio button fields they trigger once but
> then nothing after that.  I have multiple fields in a form that i need
> to know if one of them changes and which spedific field.  Below is an
> example of two foelds i tested and they trigger once with the alert but
> then nothing after that. I also tried individual observers for each
> field test_yes and test_no but with the same issue.
>
> <%= radio_button_tag ''test'', "yes" %>
> <%= radio_button_tag ''test'', "no" %>
>
> <%= observe_field(''test'',
>                   :on => ''click'',
>                   :function => "alert(''Element Yes
changed'')"%>
>
> Does anyone know why or experienced something like this before?
>
> JB
> --
> Posted viahttp://www.ruby-forum.com/.
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AndyV wrote:
> If I remember correctly, I think you''ll need an id on each radio
> button and need to observe each radio button individually.  The
> ''grouping'' of the radio buttons into a single field value
that''s
> posted back does not replace the fact that it''s actually a
collection
> of individual html elements on the form.
> 
> On May 16, 4:07 pm, John Butler
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
Ye ive tried adding an observer to each individual radio button but the 
same thing happens.

<%= observe_field(''test_yes'',
                  :on => ''click'',
                  :function => "alert(''Element Yes
changed'')"%>

<%= observe_field(''test_no'',
                  :on => ''click'',
                  :function => "alert(''Element Yes
changed'')"%>

Im just going to have to post the whole form back and find out which one 
is set to 1 and do it that way.

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You might want to try observe_form, 
http://wiki.rubyonrails.org/rails/pages/observe_form+-+Passing+Parameters
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