How do I create a rule that makes a field mandatory only if a specific domain value is selected in another field? ArcPro/Collector

[CraigGadaloff]

I have a table with some fields which are required and some which are not. How do I make a field that isn't mandatory by default become mandatory based on the selected value of another field? I am using this in collector and if 'other' is selected then I need a second field which is a free text field to be required to be populated by the user.

[ColinLawrence · Accepted solution]

Craig,

This isnt currently possible in Collector. You may have seen the announcement for Field Maps. Within the first release later this year there will be included some smart form capabilities; this should include conditional logic such as the situation you describe. 

Currently, you can accomplish a similar workflow in Survey123.

Regards,

Colin

[Scott_Harris]

Hey Craig,

In Pro you can create and use Attribute Rules. Your example sounds like a constraint attribute rule.

The expression could be something like this:

if ($feature.Field1 == other)
{
 If ($feature.Field2 != null)
 { return true; }
 else
 { return false; }
}
Else
{ return true; }‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

-Scott