Hmm, that’s not quite right. The intial form still always gets the empty list for contexts, so we don’t hit the :error case there.
# task has context 1 and 2
phx_form =
task
|> AshPhoenix.Form.for_update(:update)
|> Phoenix.Component.to_form()
# this fails
assert :error =
Ash.Changeset.fetch_argument(phx_form.source.source, :contexts)
match (=) failed
code: assert :error = Ash.Changeset.fetch_argument(phx_form.source.source, :contexts)
left: :error
right: {:ok, []}
Edit:
I’ve tried a similar approach using fetch_change but that’s not it either.
assert :error =
Ash.Changeset.fetch_change(phx_form.source.source, :contexts)
assert [%Context{id: ^context_1_id}, %Context{id: ^context_2_id}] =
phx_form.source.source.data.contexts
form_params = %{"contexts" => [to_string(context_2_id)]}
assert validated_form = AshPhoenix.Form.validate(phx_form, form_params)
assert validated_form.source.source.valid?
# this fails
assert {:ok, contexts_from_changeset} =
Ash.Changeset.fetch_change(validated_form.source.source, :contexts)
code: assert {:ok, contexts_from_changeset} =
Ash.Changeset.fetch_change(validated_form.source.source, :contexts)
left: {:ok, contexts_from_changeset}
right: :error
