I think this format changes only the custom field in question. I’ve tested it briefly, and it seemed to do the trick. ![]()
users=User.where("users.created_at <= '2019-09-13'::timestamp")
users.each do |u|
u.custom_fields["user_field_16"] = "Nil"
u.save
end
Though if you wanted the field to be NULL rather than say ‘Nil’ you could try this instead:
users=User.where("users.created_at <= '2019-09-13'::timestamp")
users.each do |u|
u.custom_fields["user_field_16"] = NIL
u.save
end