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

You have to include a hidden element.

David

On 2013-01-17, at 7:13 PM, Chuck Hill <[email protected]> wrote:

> That is an old HTML feature.  A form containing all unckecked =
checkboxes submits nothing.   You are not the first to have been bitten!
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> Chuck
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> On 2013-01-17, at 7:01 PM, Ond=C5=99ej =C4=8Cada wrote:
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>> Hello there,
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>> I've got this kind of form:
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>> <wo:form action =3D "$app.emptyAction">
>> Check
>> <wo:checkbox checked =3D "$auctionTemplate.hiddenForOwner" onchange =3D=
 "this.form.submit();" /> hidden for owner=20
>> <wo:checkbox checked =3D "$auctionTemplate.hiddenForBroker" onchange =
=3D "this.form.submit();" /> hidden for broker
>> </wo:form>
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>> where app.emptyAction is truly an empty action (no contents, returns =
null), and it works excellently -- unless the last of the switches =
(regardless which one) is to be switched off.
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>> In that case, the form properly reloads, but auctionTemplate is _not_ =
changed at all -- the application is _not_ informed about the change, =
and the hiddenForXXX property stays on.
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>> Just by chance, I've found that if I add a completely unused variable =
'wtf' to the component and change the form thus:
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>> <wo:form action =3D "$app.emptyAction">  ### action which does =
nothing at all
>> Check
>> <wo:checkbox checked =3D "$auctionTemplate.hiddenForOwner" onchange =3D=
 "this.form.submit();" /> hidden for owner=20
>> <wo:checkbox checked =3D "$auctionTemplate.hiddenForBroker" onchange =
=3D "this.form.submit();" /> hidden for broker
>> <wo:hidden value =3D "$wtf"/>
>> </wo:form>
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>> it works quite all right.
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>> What the heck?!? Is that a known bug in HTML or WebObjects or...what? =
Or is there some weird problem in my code somewhere?
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>> Thanks and all the best,
>> ---
>> Ondra =C4=8Cada
>> OCSoftware:     [email protected]               http://www.ocs.cz
>> private         [email protected]             http://www.ocs.cz/oc
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> --=20
> Chuck Hill             Senior Consultant / VP Development
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overall knowledge of WebObjects or who are trying to solve specific =
problems.   =20
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