Feature Service- required fields

[AaronWorthley1]

Is it possible to make some attribute fields in a hosted feature service required?  Ideally I'd like to make this change to an already published service.

[MikeMinami]

Rickey Fite‌

You can add a "required" field by unchecking the "allows null values" option when creating the field. This option is available when there's no features in the layer. We don't show this option on layers with features because all records would violate the rule once the field gets created.

thanks,

Mike

[AndresCastillo]

Hi, 

I was able to resolve this in Web Appbuilder, using the Smart Editor Widget:

How to use Smart Editor to require user to populate field?