single checkbox - required: what does it mean?

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Hi Jarek,

Yes, I agree. Should making a Single checkbox "required" be "mapped" to a
constraint `. = 'true'` in the source?  I reckon this would make sense.

Thinking out loud, the thing is that Form Builder doesn't have a knowledge
of specific XBL components, so we would need a mechanism for XBL components
to declare that required is enforced using a constraint they provide. When
users mark the filed as required, Form Builder would add the constraint, and
conversely, when it finds that constraint, it would indicate the field as
required in the Control Settings. Maybe inside:

    <fb:metadata>
        <fb:validation>
            <fb:required constraint=". = 'true'"/>
        </fb:validation>
    </fb:metadata>

We'll need to think some more about this one! And of course, just let me
know if I missed your point.

-Alex

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Hi Jarek,

We gave some more thoughts about this, and I think came up with a better
design, which is described in the following 2 RFEs. And of course, you'll
let me know if you have any feedback about this.

https://github.com/orbeon/orbeon-forms/issues/4709
https://github.com/orbeon/orbeon-forms/issues/4710

-Alex

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Hi Alex,

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Hi Bruno,

Unfortunately, these haven't been implemented yet, but I added +1 from you.

-Alex

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