GF Nested Forms — auto add a child entry to a Nested Form field

You can! We have a snippet that adds the ability to trigger population in a Nested Form field. It allows you to automatically add a child entry to a Nested Form field with data from your parent form. This is useful when wanting to do things like include the primary registrant as one of the child registrants in the Nested Form field.

Some tips on using it:

Static values can be inserted into the Nested Form field using the field_map parameter.
To trigger population when any value is inserted into the trigger_field_id, set the trigger_field_value to _notempty_.