Form with just checkboxes does not allow to switch all off?!?

[Ondřej Čada]

Hello there,

I've got this kind of form:

<wo:form action = "$app.emptyAction">
Check
<wo:checkbox checked = "$auctionTemplate.hiddenForOwner" onchange = "this.form.submit();" /> hidden for owner
<wo:checkbox checked = "$auctionTemplate.hiddenForBroker" onchange = "this.form.submit();" /> hidden for broker
</wo:form>

where app.emptyAction is truly an empty action (no contents, returns null), and it works excellently -- unless the last of the switches (regardless which one) is to be switched off.

In that case, the form properly reloads, but auctionTemplate is _not_ changed at all -- the application is _not_ informed about the change, and the hiddenForXXX property stays on.

Just by chance, I've found that if I add a completely unused variable 'wtf' to the component and change the form thus:

<wo:form action = "$app.emptyAction"> ### action which does nothing at all
Check
<wo:checkbox checked = "$auctionTemplate.hiddenForOwner" onchange = "this.form.submit();" /> hidden for owner
<wo:checkbox checked = "$auctionTemplate.hiddenForBroker" onchange = "this.form.submit();" /> hidden for broker
<wo:hidden value = "$wtf"/>
</wo:form>

it works quite all right.

What the heck?!? Is that a known bug in HTML or WebObjects or...what? Or is there some weird problem in my code somewhere?

Thanks and all the best,
---
Ondra Čada
OCSoftware: ***@ocs.cz http://www.ocs.cz
private ***@ocs.cz http://www.ocs.cz/oc

[Chuck Hill]

That is an old HTML feature. A form containing all unckecked checkboxes submits nothing. You are not the first to have been bitten!

Chuck

Post by Ondřej Čada
Hello there,
<wo:form action = "$app.emptyAction">
Check
<wo:checkbox checked = "$auctionTemplate.hiddenForOwner" onchange = "this.form.submit();" /> hidden for owner
<wo:checkbox checked = "$auctionTemplate.hiddenForBroker" onchange = "this.form.submit();" /> hidden for broker
</wo:form>
where app.emptyAction is truly an empty action (no contents, returns null), and it works excellently -- unless the last of the switches (regardless which one) is to be switched off.
In that case, the form properly reloads, but auctionTemplate is _not_ changed at all -- the application is _not_ informed about the change, and the hiddenForXXX property stays on.
<wo:form action = "$app.emptyAction"> ### action which does nothing at all
Check
<wo:checkbox checked = "$auctionTemplate.hiddenForOwner" onchange = "this.form.submit();" /> hidden for owner
<wo:checkbox checked = "$auctionTemplate.hiddenForBroker" onchange = "this.form.submit();" /> hidden for broker
<wo:hidden value = "$wtf"/>
</wo:form>
it works quite all right.
What the heck?!? Is that a known bug in HTML or WebObjects or...what? Or is there some weird problem in my code somewhere?
Thanks and all the best,
---
Ondra Čada
_______________________________________________
WebObjects-dev mailing list
http://www.omnigroup.com/mailman/listinfo/webobjects-dev

[p***@mac.com]

You have to include a hidden element.

David

Post by Chuck Hill
That is an old HTML feature. A form containing all unckecked checkboxes submits nothing. You are not the first to have been bitten!
Chuck

Post by Ondřej Čada
Hello there,
<wo:form action = "$app.emptyAction">
Check
<wo:checkbox checked = "$auctionTemplate.hiddenForOwner" onchange = "this.form.submit();" /> hidden for owner
<wo:checkbox checked = "$auctionTemplate.hiddenForBroker" onchange = "this.form.submit();" /> hidden for broker
</wo:form>
where app.emptyAction is truly an empty action (no contents, returns null), and it works excellently -- unless the last of the switches (regardless which one) is to be switched off.
In that case, the form properly reloads, but auctionTemplate is _not_ changed at all -- the application is _not_ informed about the change, and the hiddenForXXX property stays on.
<wo:form action = "$app.emptyAction"> ### action which does nothing at all
Check
<wo:checkbox checked = "$auctionTemplate.hiddenForOwner" onchange = "this.form.submit();" /> hidden for owner
<wo:checkbox checked = "$auctionTemplate.hiddenForBroker" onchange = "this.form.submit();" /> hidden for broker
<wo:hidden value = "$wtf"/>
</wo:form>
it works quite all right.
What the heck?!? Is that a known bug in HTML or WebObjects or...what? Or is there some weird problem in my code somewhere?
Thanks and all the best,
---
Ondra Čada
_______________________________________________
WebObjects-dev mailing list
http://www.omnigroup.com/mailman/listinfo/webobjects-dev

--
Chuck Hill Senior Consultant / VP Development
Practical WebObjects - for developers who want to increase their overall knowledge of WebObjects or who are trying to solve specific problems.
http://www.global-village.net/gvc/practical_webobjects
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