Rails - Mar 2009 - Validation - set focus

hi,
Is there any way to set focus in a particular field, after validation in
rails??
or we have to use only javascript.

For example.,
validates_presence_of :username
(assume there is no username given)
after validation, how can i set focus in that particular username
textbox.

is there any way in rails or should i use javascript.
Thanks.

--------
my ror blog
http://www.srikanthjeeva.blogspot.com
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No idea in ruby, but you can use JS for this..
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ya i can do it with JS,
any way in rails??

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http://www.srikanthjeeva.blogspot.com
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On 3 Mar., 08:41, Srikanth Jeeva
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:
> ya i can do it with JS,
> any way in rails??
You can approach this by making Rails generate some JavaScript for
you. I''ve put together a little example: http://pastie.org/405697 Call
the method somewhere in your view and the method _should_ make some
JavaScript to focus on the first field in your form that has errors.
Keep in mind that it''s untested so if it doesn''t work you
might need
to fix an error or two, or maybe ask for help here.

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David Knorr
http://twitter.com/rubyguy

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On 3 Mar., 08:57, "ruby...-DaQTI0RpDDMAvxtiuMwx3w@public.gmane.org"
<ruby...-DaQTI0RpDDMAvxtiuMwx3w@public.gmane.org>
wrote:
> > ya i can do it with JS,
> > any way in rails??
>
> You can approach this by making Rails generate some JavaScript for
> you.
I''ve revised the example a bit. This works perfectly for me. Feel free
to try it out: http://pastie.org/405733

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http://twitter.com/rubyguy
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On 3 Mar., 10:07, "ruby...-DaQTI0RpDDMAvxtiuMwx3w@public.gmane.org"
<ruby...-DaQTI0RpDDMAvxtiuMwx3w@public.gmane.org> wrote:
> I''ve revised the example a bit. This works perfectly for me. Feel
free
> to try it out:http://pastie.org/405733
I need to mention that in the latest example (http://pastie.org/
405733) I''m also overriding the #error_messages_for method, so now you
can actully focus on the first field that has errors automatically.
The only thing you need to change is your application layout. Put:

<%= yield :head %>

... just before </head>. And then of course add the two methods to
your application helper file. Hope it helps... :)

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David Knorr
http://twitter.com/rubyguy
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really thanks man....

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