Rails - May 2009 - Passing a JavaScript variable through a Rails params hash

Hi guys, hoping someone can give me a pointer with this?

I have a Javascript variable that I''m updating dynamically as a user
interacts with the page. I want the user to be able to save it''s value
at any time along with some text data in a pop-up form, so the best way
I can think of is to pass it through the params hash without writing it
into the form. I''m not totally sure how to do this though?

The only practical solution i''ve got is for a hidden field line in the
form to be dynamically generated when the user goes to save it, but this
feels like overkill to me. Does anyone have any suggestions for a neater
way to do it?

Thanks,

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

Hi

You need to change the target attrubute of the form tag. Give it an id  
if it doesn''t have one:
form_tag({:action =>"update"}, {:id => "the_form"}) do
...
Then if using prototype, $(''the_form'').target +=
''&varname=''+var;

Mind you URL encode the params value. You can use the escapeHTML  
string class to encode it properly if using prototype. I think there  
is also an escape function ;)

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On 25/05/2009, at 10:40 AM, Jon Hope <rails-mailing-list@andreas- 
s.net> wrote:
>
> Hi guys, hoping someone can give me a pointer with this?
>
> I have a Javascript variable that I''m updating dynamically as a
user
> interacts with the page. I want the user to be able to save it''s
value
> at any time along with some text data in a pop-up form, so the best  
> way
> I can think of is to pass it through the params hash without writing  
> it
> into the form. I''m not totally sure how to do this though?
>
> The only practical solution i''ve got is for a hidden field line in
the
> form to be dynamically generated when the user goes to save it, but  
> this
> feels like overkill to me. Does anyone have any suggestions for a  
> neater
> way to do it?
>
> Thanks,
>
> Jon
> -- 
> Posted via http://www.ruby-forum.com/.
>
> >