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Newbie Q: Help with Canvas API Radiobuttons and Ajax

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Shawn MacIntyre

Newbie Q: Help with Canvas API Radiobuttons and Ajax

Hello,

I have been learning Seaside and I am very interested in the new rendering API and the integrated Ajax support. However, I have run into a point where I am stumped. I am trying to build a simple yes/no poll as a learning experience. Everything displays fine and when don't make a selection I get the result I expect. However I get an error when I make a selection. I would appreciate any pointers on where I have gone wrong. I am running Squeak 3.8 and the latest release of Seaside 2.6.

This is the offending code:

!URVote methodsFor: 'as yet unclassified' stamp: 'sdm 3/11/2006 23:40'!

renderContentOn: html

html div class: 'vote'; with: [

html heading: 'Today''s Vote' level: 2.

html paragraph class: 'question'; with: 'Are you happy?'.

html div id: 'vote'.

html radioGroup: [:group |

html radioButton

group: group;

id: 'yesVote';

with: 'Yes';

callback: [ self yesVote ].

html break.

html radioButton

group: group;

id: 'noVote';

with: 'No';

callback: [ self noVote ].

html break].

html button value: 'Vote';

onClick: (html ajax

id: 'vote';

triggerCallbackFor: 'yesVote';

triggerCallbackFor: 'noVote';

on: #renderVotesOn: of: self)]

! !

This is the trace back displayed in the browser:

Error: key not found

Dictionary(Object)>>error:

self	a Dictionary('1'->a WADispatchCallback '2'->a WAValueCallback '3'->a WAValueCallback '4'->a WAAction...etc...
temps
aString	'key not found'
inst vars
tally	9
array	#('3'->a WAValueCallback '8'->a WAActionCallback '1'->a WADispatchCallback '6'->a WAActionCallback n...etc...

Dictionary>>errorKeyNotFound

self	a Dictionary('1'->a WADispatchCallback '2'->a WAValueCallback '3'->a WAValueCallback '4'->a WAAction...etc...
temps
inst vars
tally	9
array	#('3'->a WAValueCallback '8'->a WAActionCallback '1'->a WADispatchCallback '6'->a WAActionCallback n...etc...

[] in Dictionary>>at: {[self errorKeyNotFound]}

self	a Dictionary('1'->a WADispatchCallback '2'->a WAValueCallback '3'->a WAValueCallback '4'->a WAAction...etc...
temps
key	'on'
inst vars
tally	9
array	#('3'->a WAValueCallback '8'->a WAActionCallback '1'->a WADispatchCallback '6'->a WAActionCallback n...etc...

Dictionary>>at:ifAbsent:

self	a Dictionary('1'->a WADispatchCallback '2'->a WAValueCallback '3'->a WAValueCallback '4'->a WAAction...etc...
temps
key	'on'
aBlock	[] in Dictionary>>at: {[self errorKeyNotFound]}
assoc	nil
inst vars
tally	9
array	#('3'->a WAValueCallback '8'->a WAActionCallback '1'->a WADispatchCallback '6'->a WAActionCallback n...etc...

Dictionary>>at:

self	a Dictionary('1'->a WADispatchCallback '2'->a WAValueCallback '3'->a WAValueCallback '4'->a WAAction...etc...
temps
key	'on'
inst vars
tally	9
array	#('3'->a WAValueCallback '8'->a WAActionCallback '1'->a WADispatchCallback '6'->a WAActionCallback n...etc...

Thank you for your help,

Shawn

Shawn MacIntyre

Edmonton, Alberta, Canada

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URVote.st (2K) Download Attachment

URComponent.st (455 bytes) Download Attachment

Lukas Renggli

Re: Newbie Q: Help with Canvas API Radiobuttons and Ajax

> with: 'Yes';
> callback: [ self yesVote ].
> [...]
> with: 'No';
> callback: [ self noVote ].

#with: must be always the last message in the cascade, because it
triggers to emit the HTML tag to the stream. In you version the
callback gets ignored after all, it should work if you swap #with: and
#callback:

But yes, I should write some tests for all HTML form controls, I not
quite sure if they all work properly together with the script.aculo.us
framework ;-)

Cheers,
Lukas

--
Lukas Renggli
http://www.lukas-renggli.ch
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Shawn MacIntyre

Re: Newbie Q: Help with Canvas API Radiobuttons and Ajax

On Mar 12, 2006, at 2:01, Lukas Renggli wrote:

>> with: 'Yes';
>> callback: [ self yesVote ].
>> [...]
>> with: 'No';
>> callback: [ self noVote ].
>
> #with: must be always the last message in the cascade, because it
> triggers to emit the HTML tag to the stream. In you version the
> callback gets ignored after all, it should work if you swap #with: and
> #callback:
>

Thank you very much for your help Lukas!

It works perfectly now -- I know I was just miss understand how
things worked.

Thanks,
Shawn
--
Shawn MacIntyre
Edmonton, Alberta, Canada

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