You can return a JSP file in response to your AJAX request (return new
ForwardResolution("/ajax-response.jsp")).
Making it super easy to include your errors and messages (<s:errors/> and
<s:messages/>).
Not the best traffic saver though. But at least it allows you to update
small portions of your site.
Cheers,
--
Samuel Santos
http://www.samaxes.com/
On Tue, Nov 16, 2010 at 3:03 PM, Nikolaos Giannopoulos <
[email protected]> wrote:
> Andrey,
>
> Clearly the choice of JS framework is not the issue here. However, what
> I was looking for was a MooTools version of the jQuery script that Aaron
> Porter wrote that leverages the "field-metadata" tag and that is why I
> mentioned MooTools here.
>
> Your suggestion however is very interesting and sounds very simple to
> implement and does solve the localization of error messages.
>
> However, I am concerned thought that doing an Ajax call per "each" field
> change will amount to a lot of extra server requests and may be a
> performance clog on a high traffic site. Did you ever consider limiting
> to 1 Ajax request on hitting form "submit"... basically a pre-validation
> to actual form submission?
>
> Thoughts???
>
> --Nikolaos
>
>
>
> Andrey Listochkin wrote:
> > Hi, Nikolaos
> >
> > I don't think the choice of JS framework could affect validation in
> > any way. After all you do use ajax, don't you? :)
> >
> > Here's how we solved it in one of our projects:
> >
> > 1. On client side we add an event listener to each form field (we
> > listen for onChange event).
> > 2. This event listener does a plain vanilla ajax request. Something like:
> >
> > /my/action/bean?fieldName=User+Value&ajaxValidate=atrue
> > In our action bean we have fields with some validation rules and
> > (optionally) custom methods assigned. If we leave it as is it won't
> > handle our request correctly because some other fields might be
> > required. That's why ..
> >
> > 3. Our action bean implements ValidationErrorHandler [1] interface to
> > hijack the default validation handling mechanism.
> > 4. By the time handleValidationErrors method is called all validation
> > rules are already applied and ValidationErrors array is already filled
> > in.
> > 5. Inside this handleValidationErrors we check for ajaxValidate
> > parameter in request and if it's present we filter out validation
> > errors corresponding to filedName field.
> > 6. If no errors are found we return a JSON {status: 'ok'}. Otherwise
> > we return JSON with validation errors.
> > 7. On a client side aour Ajax callback function expects a JSON
> > response data. If JSON has any errors we show them to user.
> >
> > It's not really hard to implement ajax validation this way and it's
> > completely library-agnostic. In our project we use jQuery so I don't
> > show the code to you to avoid confusion. But if you follow the
> > guidelines that's going to be easy.
> >
> > Note that we still required to have a ajaxValidate handler defined in
> > our action bean. It's going to be invoked when the last field in a
> > form is being validated and is going to pass validation. This is
> > because in this case ValidationErrors array is empty and
> > handleValidationErrors isn't called. If this method isn't defined
> > Stripes will use a default handler - and it might be not something you
> > intend to.
> >
> > Cheers,
> > Andrey
> >
> > [1]
> >
> http://stripes.sourceforge.net/docs/current/javadoc/net/sourceforge/stripes/validation/ValidationErrorHandler.html
> >
> >
> > On Mon, 15 Nov 2010 20:05:09 +0200, Nikolaos Giannopoulos
> > <[email protected]> wrote:
> >
> >> Hi,
> >>
> >> I noticed the following page which shows how to integrate Stripes w/
> >> client side validation via JQuery:
> >>
> http://www.stripesframework.org/display/stripes/Validation+Reference#ValidationReference-Usingthe{{fieldmetadata}}tag<http://www.stripesframework.org/display/stripes/Validation+Reference#ValidationReference-Usingthe%7B%7Bfieldmetadata%7D%7Dtag>
> >>
> >>
> >> Has anyone done anything similar w/ MooTools?
> >>
> >> If so, was it a rewrite of Aaron's code or did it hook into MooTools
> >> Form Validation?
> >>
> >> And if so - anything shared would be appreciated.
> >>
> >> We are debating whether to do this now (though are short on time - what
> >> else is new) but anything that accelerates that could help us and in
> >> turn we would post it back to the community. I also realize the effort
> >> isn't huge but JQuery notation is new to me and doing this right w/
> >> MooTools and classes will result in a pretty extensive re-write I'm
> >> afraid.
> >>
> >> Lastly, this is probably a stretch but did anyone solve the localization
> >> issue in all of this i.e. localized error messages exist in resource
> >> bundles on the Stripes server side yet the messages need to be
> >> accessible to provide the correct message to the user... Ajax is one
> >> possibility... using a generic set of translated messages is another...
> >> but all don't appear optimal.
> >>
> >> Much Appreciated.
> >>
> >> --Nikolaos
> >>
> >>
> ------------------------------------------------------------------------------
> >>
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> >> _______________________________________________
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> >> [email protected]
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> >
> >
>
>
> --
> Nikolaos Giannopoulos
> Director of Information Technology
> BrightMinds Software Inc.
> e. [email protected]
> w. www.brightminds.org
> t. 1.613.822.1700
> c. 1.613.797.0036
> f. 1.613.822.1915
>
>
>
> ------------------------------------------------------------------------------
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Beautiful is writing same markup. Internet Explorer 9 supports
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Spend less time writing and rewriting code and more time creating great
experiences on the web. Be a part of the beta today
http://p.sf.net/sfu/msIE9-sfdev2dev
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