Add the ability to customize the registration form with custom fields

[guglielmobartelloni]

Just as the title says: implement a way to add additional field in the registration form

[jimsynz]

Hi @guglielmobartelloni.

Thanks for taking the time to provide feedback.

You're right that it's not possible to do this at the moment, however the generated :register_with_password action is set up to accept any extra attributes passed to it. I've been scratching my head trying to figure out how to do this without opening a can of worms (input types, accessibility, etc) and I haven't thought of anything yet. Keen for any feedback anyone has on how to do this. In the mean time the best solution is to roll your own registration screen.

[zachdaniel]

@jimsynz perhaps we should actually make the generated register_with_password action have an explicit accept list? The forms that we're building in ash_authentication_phoenix could be altered by the client to set other public writable attributes unless we either 1. put an explicit accept list or 2. do a Map.take/2 on the params in ash_authentication_phoenix before submitting them.

[zachdaniel]

Yeah, thinking about it, I think all of the ash_authentication actions should have an explicit accept list.

[allenwyma]

I got caught up in this. So we can override :register_with_password an this will be picked up by AAP (ash_authentication_phoenix)?

[zachdaniel]

It won't add additional fields to the view, no. The suggestion is to write your own registration live view or to push the gathering of additional fields to a step after sign up.

[allenwyma]

i saw there's an inner_block that can somehow be set, but it wasn't so clear. But, seems as though, like you said, it'd be easier to just do our own template:

How can i reuse the registration code? There's no default action there.

[zachdaniel]

There is a register_with_password action added to the user resource (IIRC that is what its called) You can poke around to see the action and its arguments with

Ash.Resource.Info.actions(Resource) |> Enum.map(&(&1.name)) # to get the action names, so you can confirm it

Ash.Resource.Info.action(Resource, :name) # to see the action definition