[Seaside] #answer from within a jQuery

[John Toohey]

Yep, I figured that, so I refactored to use just Seaside callbacks for
the login, and not use the Ajax handlers.  I have it working now, but
then remembered that I had done this before. I have a jQuery button on
a page, and its callback calls #answer. I've never had a problem with
that, and the only difference is that, in this case, I used jQuery
ajax callback:[self answer], rather than jQuery ajax script:[:s| s].

I can see that it may be a problem, but now I'm worried that my other
code is not correct, and is working only because of timing.


On Fri, Apr 30, 2010 at 17:05, Julian Fitzell <jfitzell at gmail.com> wrote:
> The IllegalStateException (could be a clearer name) is raised if you try to
> set an HTTP header after the headers have already been written to the
> socket. So most likely you're using a streaming server and have already
> started writing to the document body.
>
> I can't visualize exactly which header that would be without stepping
> through it or seeing the stack, but I seem to recall we determined that
> calling inside an ajax request didn't make sense (could be true for
> answering to something that was called--as opposed to shown--as well?).
>
> Hopefully that gives you a nudge in the right direction. If not, I'd have to
> dig in further but maybe Lukas knows more off the top of his head.
>
> Julian
>
> On Fri, Apr 30, 2010 at 5:43 PM, John Toohey <jt at parspro.com> wrote:
>>
>> I have a login dialog (jQuery Dialog) is a component that is called
>> from my root task. Its Login button has an onClick handler like this
>> :-
>> onClick: (html jQuery ajax  script: [ :s | self validateLogin:  s])
>>
>> During the #validateLogin, the id/password etc are checked, and if
>> there is a problem, then the script is filled with jQuery calls to
>> highlight fields and display a message. This works as expected,
>> however, if all the tests pass, then the #validateLogin replies with
>> an #answer call. This sends control to my root task, which then
>> #call's the main page component.
>>
>> At this point, Seaside throws an IllegalStateException from #isCommitted.
>>
>> If I use a regular callback, then the #answer/#call works, but in that
>> case I don't have a script to send back to the browser, in error
>> situations.
>>
>> Is the problem because the Ajax handler is terminated by the #answer call?
>>
>> --
>> -JT
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-- 
-JT