remove attachment ability if already an attachment exists for the record


I would like to remove the ability to attach files for a record when an attachment already exists.

Any ideas how to achieve this ?

I implemented a render condition based on the parent model field value which is getting updated upon an attachment upload to a record.

It’s working fine . . . 

Great work.  That’s exactly what I would have recommended. 

Thanks, Rob. I thought I might need to write a snippet or something but could do it without any custom code.