Rails - Feb 2006 - newbie question regarding basic AJAX form verification

Hi,

I''m confused about how form verification with AJAX works. 
Let''s say I have a
''new.rhtml'' view that contains a form with two fields, and the
form action is
''create''.  Let''s assume that I also want to do some
type of data validation on
one of the two fields via AJAX before I submit the form.   But since
I''ve
already defined my form action with form_tag() as ''create'', I
can''t also use
form_remote_tag() at the same time, right?

I''m sure I''m missing somethign obvious. but I could use some
help.

Thanks,

Stan Mcfarland

You could do your data validation directly in the method "create" of
your controller. If data are wrong, just redisplay your form with a
message error ...

Thomas.

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

Thomas <thomas_mahier@...> writes:
> 
> You could do your data validation directly in the method "create"
of
> your controller. If data are wrong, just redisplay your form with a
> message error ...
> 
> Thomas.
> 
Yeah, but that''s not what I need to do.  Think, for example, how a
spell check
application would work.  You have one button to submit the form, and another 
button (or link) that does a spell check on a single textarea.  This is what I 
can''t figure out how to do.

-stan

On 2/17/06, Stan McFarland <sfmcfar@gmail.com>
wrote:
>
> Thomas <thomas_mahier@...> writes:
>
> >
> > You could do your data validation directly in the method
"create" of
> > your controller. If data are wrong, just redisplay your form with a
> > message error ...
> >
> > Thomas.
> >
>
> Yeah, but that''s not what I need to do.  Think, for example, how a
spell
> check
> application would work.  You have one button to submit the form, and
> another
> button (or link) that does a spell check on a single textarea.  This is
> what I
> can''t figure out how to do.
>
> -stan
>
You can give the spell-check submit button a name, which you can then test
for in @params within your action.

  - Rowan

--
Morality is usually taught by the immoral.
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Hi Stan,

I''d have a look at observe_field.

http://www.railsmanual.org/module/ActionView::Helpers::PrototypeHelper/observe_field

There is, as I''m often fond of pointing out, some stuff in Chad
Fowler''s
Rails Recipes on this.  The example is the on-the-fly search (a la 
Google Suggest), but you can use observe_field to pass the contents of 
an individual field to an action periodically (say once a second) and 
return, say, some RJS to highlight the field red if it doesn''t
validate.

observe_field obviously only works with one field at a time, so I''m not
sure how you''d pass the whole form periodically.

<fx: googles around />

Oh wait, observe_form...of course it would be called observe_form :-)

http://www.railsmanual.org/module/ActionView::Helpers::PrototypeHelper/observe_form

Alan

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