Controls

Re: Multiple Selection Box - Ensuring at least one value is ticked.

Jimmy — Fri, 28 May 2010 17:55:40 GMT

I see. This seems to be yet another quirk of the multi-selection list box. Validation can only be performed on fields that exist. Since in your case the invalid state is when there are no nodes of your field, validation cannot take place. I'd suggest using an expression box with a red asterisk that's displayed when none of the items is checked, and use rules to prevent submit when that's the case (if that's your objective).

Re: Multiple Selection Box - Ensuring at least one value is ticked.

Catharine — Fri, 28 May 2010 16:47:08 GMT

I put the validation on the underlying field. And I expected a red * or hatching to appear somewhere on/round the field, or at least the error message to be displayed when I tried to submit the form.

Am I expecting it to be too clever ?

Catharine

Re: Multiple Selection Box - Ensuring at least one value is ticked.

Jimmy — Mon, 24 May 2010 13:48:55 GMT

Could you elaborate on what you're using to validate the list box? I recall you had an earlier post where you mentioned you couldn't find a way to perform validation on a multi-selection list box.

Are you displaying an error in an expression box, or disabling the submit button, or something else?

Multiple Selection Box - Ensuring at least one value is ticked.

Catharine — Fri, 21 May 2010 15:32:32 GMT

Hi,

How do you validate that at least one value in a multiple selection box is ticked.

My data source is

Group
Region (repeating field)

My multiple selection box is based on Region

I have tried to put the following validation 0 = count(../my:Region[. != ""]) on the Region repeating field. and it doesn't seem to work.

Catharine