5 replies

Child form is not automatically added when a `:union` type attribute has a `value` of `nil`

Im trying to create a Form using

Form.for_update

Form.for_update

on a resource that has a

:union

:union

type attribute where the value is nil:

form = AshPhoenix.Form.for_update(
  %Resource{union: %Ash.Union{type: :custom, value: nil}},
  forms: [auto?: true]
)

# form.forms => %{}

form = AshPhoenix.Form.for_update(
  %Resource{union: %Ash.Union{type: :custom, value: nil}},
  forms: [auto?: true]
)

# form.forms => %{}

With this the

form.forms

form.forms

is empty. I would expect the forms to have a

union

union

key because I need a form to edit the union.

Adding a form using

AshPhoenix.Form.add_form(form, :union)

AshPhoenix.Form.add_form(form, :union)

adds the form, but that doesnt have the correct

type

type

set in the union, it takes the first type from the constraints it seems.

Solution