Rails - Mar 2006 - Can RoR''s AJAX helpers do this?

Hi,

I want to type text into an input field then on enter, use AJAX to 
update the value of an input field elsewhere on the screen.

''observe_field'' allows me to watch a form field and
dynamically update a
DIV. Is there a variation or other method to allow me to update a field 
instead?

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Lindsay Boyd wrote:
>Is there a variation or other method to allow me to update a field 
> instead?
I have raw AJAX code that will do this. If there isn''t a RoR helper to 
provide this functionality, is there a recommended RoR approach to 
embedding Javascript in an app?

thanks
Lindsay


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On Mar 21, 2006, at 15:24, Lindsay Boyd wrote:
> I want to type text into an input field then on enter, use AJAX to
> update the value of an input field elsewhere on the screen.
>
> ''observe_field'' allows me to watch a form field and
dynamically
> update a
> DIV. Is there a variation or other method to allow me to update a  
> field
> instead?
Just for the record, note that it does not need to be a div, it  
updates the content of any element with that id in that page. For  
instance, to update the contents of some paragraph just assign an id  
to it:

     <%= observe_field(''foo'', :url => { :action =>  
''my_ajax_updater'' }) %>
     <!-- ... and 100 lines below ... -->
     <p id="foo">...</p>

Inline elements can be changed directly or wrapped in ad-hoc spans as  
well.

Is observe_field then suitable for your needs?

-- fxn

On Mar 21, 2006, at 16:00, Xavier Noria wrote:
> On Mar 21, 2006, at 15:24, Lindsay Boyd wrote:
>
>> I want to type text into an input field then on enter, use AJAX to
>> update the value of an input field elsewhere on the screen.
>>
>> ''observe_field'' allows me to watch a form field and
dynamically
>> update a
>> DIV. Is there a variation or other method to allow me to update a  
>> field
>> instead?
>
> Just for the record, note that it does not need to be a div, it  
> updates the content of any element with that id in that page. For  
> instance, to update the contents of some paragraph just assign an  
> id to it:
>
>     <%= observe_field(''foo'', :url => { :action
=>
> ''my_ajax_updater'' }) %>
>     <!-- ... and 100 lines below ... -->
>     <p id="foo">...</p>
Oh sorry, that would be

     <%       observe_field(
         ''my_field'',
         :url => { :action => ''my_ajax_updater'' },
         :update => ''foo''
       )
     %>
     <!-- ... and 100 lines below ... -->
     <p id="foo">...</p>

-- fxn

Xavier Noria wrote:
> Is observe_field then suitable for your needs?
Yes, it is. Thanks Xavier!

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