[Seaside] Strange error with Comet and Seaside 2.9-a3
John Toohey
johnptoohey at gmail.com
Wed Apr 22 17:18:01 UTC 2009
Still debugging this, but now I notice that the Comet Counter example
no longer works, and I think this is since I loaded the latest Comet
code. I don't see any errors, but the only way to get the counter to
update, is to do a page refresh.
On Wed, Apr 22, 2009 at 08:32, Lukas Renggli <renggli at gmail.com> wrote:
>> Do you mean that I should force a full page refresh on all the clients
>> when the server updates data? I see this error on the same session
>> that caused the data to change.
>
> Not necessarily a full refresh. Just tigger a script that fetches the
> appropriate update.
>
> With the given information I cannot reproduce the exact problem. If
> you could post a ready to run example I am sure somebody could help.
>
> Lukas
>
>>
>> Thanks.
>>
>> On Wed, Apr 22, 2009 at 02:56, Lukas Renggli <renggli at gmail.com> wrote:
>>> I cannot quite follow the real cause of the problem, but there is
>>> definitely an issue here. You push out some JQuery code that contains
>>> callbacks, these callbacks however refer to the session that created
>>> the event.
>>>
>>> This is a general problem of Comet and could probably be solved by
>>> generating different scripts for the different sessions, however there
>>> is no mechanism right now that helps you with that. The way I used it
>>> was to simply send a method call to the client to trigger a refresh.
>>>
>>> Lukas
>>>
>>> On Wed, Apr 22, 2009 at 4:47 AM, John Toohey <jt at parspro.com> wrote:
>>>> I have a render method for a table like so :-
>>>>
>>>> renderUser: aUser asRowOn: html
>>>> |id|
>>>>
>>>> id := 'bm-', aUser id asString.
>>>>
>>>> html tableRow id: id; with:
>>>> [html
>>>> tableData: [html anchor class: #underline;
>>>> onClick:((html jQuery: #ebmd) load html: [:r | r render: (self
>>>> editUserComponent: atUser id)]);
>>>> with: aUser userName];
>>>> tableData: aUser role;
>>>> .
>>>> .
>>>> .
>>>>
>>>> The onClick script calls a JQuery Dialog that pops up, and when I
>>>> click on Save, I fire an Announcement, that is registered in the same
>>>> component. The Announcement methods is like this :-
>>>>
>>>> addUser: aUser
>>>> self pusher javascript: [ :script |
>>>> script << (script jQuery: #usertable)
>>>> append: [:html | self renderUser: atUser asRowOn: html]
>>>> ]
>>>>
>>>>
>>>> When the #renderUser is called from #addUser, and the tableData code
>>>> is invoked, I get an error. This is a partial stacktrace :-
>>>>
>>>> UndefinedObject(Object)>>doesNotUnderstand: #withoutParameters
>>>> Receiver: nil
>>>> Arguments and temporary variables:
>>>> aMessage: withoutParameters
>>>> exception: MessageNotUnderstood: UndefinedObject>>withoutParameters
>>>> resumeValue: nil
>>>> Receiver''s instance variables:
>>>> nil
>>>>
>>>> JQLoad(JQAjax)>>enableCallbacks
>>>> Receiver: $("#ebmd").load("/","")
>>>> Arguments and temporary variables:
>>>>
>>>> Receiver''s instance variables:
>>>> owner: $("#ebmd")
>>>> options: a WASmallDictionary
>>>> callback: nil
>>>> callbackId: nil
>>>> selector: nil
>>>>
>>>> JQLoad(JQAjax)>>callback:
>>>> Receiver: $("#ebmd").load("/","")
>>>> Arguments and temporary variables:
>>>> aBlock: [] in JQLoad(JQAjax)>>html: {[context := self
>>>> requestContext. context ...etc...
>>>> Receiver''s instance variables:
>>>> owner: $("#ebmd")
>>>> options: a WASmallDictionary
>>>> callback: nil
>>>> callbackId: nil
>>>> selector: nil
>>>>
>>>> JQLoad(JQAjax)>>html:
>>>> Receiver: $("#ebmd").load("/","")
>>>> Arguments and temporary variables:
>>>> aBlock: [] in BookmakerRootComponent>>renderUser:asRowOn: {[:r | r
>>>> rende...etc...
>>>> context: nil
>>>> Receiver''s instance variables:
>>>> owner: $("#ebmd")
>>>> options: a WASmallDictionary
>>>> callback: nil
>>>> callbackId: nil
>>>> selector: nil
>>>>
>>>>
>>>> If I comment out the tableData line, everything works fine. If I leave
>>>> in the tableData line, and comment out the Comet push script code,
>>>> everything is fine. Both pieces of code enabled, generates the error.
>>>>
>>>> Any help, most appreciated.
>>>> --
>>>> -JT
>>>> _______________________________________________
>>>> seaside mailing list
>>>> seaside at lists.squeakfoundation.org
>>>> http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside
>>>>
>>>
>>>
>>>
>>> --
>>> Lukas Renggli
>>> http://www.lukas-renggli.ch
>>> _______________________________________________
>>> seaside mailing list
>>> seaside at lists.squeakfoundation.org
>>> http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside
>>>
>>
>>
>>
>> --
>> -JT
>> _______________________________________________
>> seaside mailing list
>> seaside at lists.squeakfoundation.org
>> http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside
>>
>
>
>
> --
> Lukas Renggli
> http://www.lukas-renggli.ch
> _______________________________________________
> seaside mailing list
> seaside at lists.squeakfoundation.org
> http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside
>
--
-JT
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