Rails - Jul 2009 - How to update rails Variable in Javascript

Hi,
am having the code like this
<%=radio_button(:nominees, count, :onclick =>
''CheckedValues();'')%> <%response.nomination %>

where CheckedValues() is a javascript function
if the radio button is selected, then i want to increase the vote_count
value by 1
vote_count is the rails variable.
how can i use this variable in javascript, i have tried as follows,

<script type="text/javascript">
var vote = <%= @voting.vote_count %>;
var radiobutton = document.getElementById("radio");
function CheckedValues(){
  if(radiobutton.checked){
vote = vote+1
};
};
</script>
but it didnt increase the value.
any help or advice would be helpful
-- 
Posted via http://www.ruby-forum.com/.

You should use observe_field with what you are trying to accomplish.

<%= radio_button :nominees, :count %>
<%= observe_field(:nominees_count, :on=>''click'',
:frequency=>0.25,
:update => :vote_count, :with => :nominees_count, :url => { :action
=>
:nominees_count_them}) %>
<div id="vote_count"></div>

Then put the method in your controller:

def nominees_count_them
  # add your counts here
  vote_count = (perform a find on the model for the current vote count)
  vote_count += 1
  # Do something with your vote count like update to a table
end

The div id is only there so you can view if it''s working.  Just look 
through observe_field and checkbox and radio buttons.  You''ll find what
you need to get it working.

This may or may not work for you.  I''m just going by what I remember. 
I
believe the syntax is correct though.


-- 
Posted via http://www.ruby-forum.com/.

Thanks for the quick reply Alpha,
Actually what i want is while selecting the radio button the vote_count 
should be increased.
 i have tried thst with update_attribute and increment methods. but the 
vote_count is not increased .
could you give some advice about how to increase the vote_count based on 
the selection.







Alpha Blue wrote:
> You should use observe_field with what you are trying to accomplish.
> 
> <%= radio_button :nominees, :count %>
> <%= observe_field(:nominees_count, :on=>''click'',
:frequency=>0.25,
> :update => :vote_count, :with => :nominees_count, :url => {
:action =>
> :nominees_count_them}) %>
> <div id="vote_count"></div>
> 
> Then put the method in your controller:
> 
> def nominees_count_them
>   # add your counts here
>   vote_count = (perform a find on the model for the current vote count)
>   vote_count += 1
>   # Do something with your vote count like update to a table
> end
> 
> The div id is only there so you can view if it''s working.  Just
look
> through observe_field and checkbox and radio buttons.  You''ll find
what
> you need to get it working.
> 
> This may or may not work for you.  I''m just going by what I
remember.  I
> believe the syntax is correct though.
-- 
Posted via http://www.ruby-forum.com/.