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List:       cgiapp
Subject:    Re: [cgiapp] Using AJAX with C::A
From:       RA Jones <ra.jones () dpw ! clara ! co ! uk>
Date:       2006-10-20 15:12:22
Message-ID: 4538E756.5030802 () dpw ! clara ! co ! uk
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Cees Hek wrote:
  > I did a talk on AJAX and perl at YAPC Chicago [1] this year.  The
> slides for most of the talks are online [2], and I added links to my
> slides [3] and source code [4].

Hi Cees, thanks I have downloaded the source code and am working my way
through the files. I cannot see any so far that use CGI::Application,
CGI::Ajax and TT, which is what I need to finally succeed. But I think
I'm pretty close now to getting this combination to work using the
following run-mode:

sub display_form {
   my $self   = shift;
		
   my $msg = shift; # collects results of validate_nhsno()
		
   use CGI::Ajax;

   my $pjx = new CGI::Ajax(
     validate_nhsno => \&validate_nhsno # NHSNo validation function
   );

   $pjx->JSDEBUG(1); # dumps AJAX server-calls to web-page

   my $ajax_js = $pjx->show_javascript();

   $self->tt_params(ajax_js=>$ajax_js, msg=>$msg);

   my $output = $self->tt_process('nhs_no.tt2');

   return $output;
}

That produces debug output (into the div with id='pjxdebugrequest')
proving that the AJAX part is actually making calls to the server, but
there is obviously still a problem as I don't get the expected error
message in response to an incorrect entry, but do get a double-backslash
appearing on-screen instead: //

It should be possible to click the link produced by JSDEBUG (eg
ajax.cgi?fname=validate_nhsno&args=4068655324&nhs_no=4068655324) and see
what the server is doing with the AJAX request, and indeed on the
non-CGI::Application script the expected string 'invalid NHSNo' is
returned. But on the CGA::App equivalent, the whole web-page is returned
instead.

There is obviously still something missing here, but I cannot see what.
The validation routine does work correctly through the submit button, so
I'm pretty sure the non-AJAX code is correct.
-- 
Richard Jones
Leeds, UK
mailto:ra.jones@dpw.clara.co.uk


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