Reply To: Update ACF field programatically that has not been 'initialised'

• John Huebner

• March 21, 2022 at 1:25 pm

You are doing this

$update_field($field_key, $display_name, $assignment_id);

you need to do this

$update_field($field_key, $user_id, $assignment_id);

and if your field allows multiple selections then you need to do this

$update_field($field_key, array($user_id), $assignment_id);

actually, you may need to do the second one even with only allowing a single user to be selected. I don’t remember if ACF stores an array or not for user fields that only allow one selection.