custom attribute wih underscore in enrollment behaves strange

[DunklerPhoenix]

Heho
I try to generate some custom attribute while a user register itself with an invite link.

first_name = request.context['prompt_data']['first_name']
last_name = request.context['prompt_data']['last_name']
request.context['prompt_data']['name'] = first_name + " " + last_name
request.context['prompt_data']['attributes.first_name'] = first_name
request.context['prompt_data']['attributes.last_name'] = last_name

The fields first_name and last_name get saved really strange. What do I need to change to save them correctly?
Greetings
Phoenix

Now:

last\:
  name: Fortune
first\:
  name: Rick

Should be:

last_name: Fortune
first_name: Rick

[DunklerPhoenix]

Answer of support:

This is due to how we parse attributes in the user write stage: https://github.com/goauthentik/authentik/blob/main/authentik/stages/user_write/stage.py#L42
 
To avoid this, you can set attributes to be a dictionary instead:
 
first_name = request.context['prompt_data']['first_name']
last_name = request.context['prompt_data']['last_name']
request.context['prompt_data']['name'] = first_name + " " + last_name
attrs = request.context['prompt_data'].setdefault('attributes', {})
attrs['first_name'] = first_name
attrs['last_name'] = last_name
 
Kind regards,