AshJsonApi: Create relationship when creating resource

Thats not bad. Although, would I have to have 2 create actions? When creating a Post, I create a Comment alongside through the managed relationship, but If I also want to create a Comment for a Post, I need another create action that specifies an argument post, :map, allow_nil? false.

Eg.

Comment resource:

create :create_direct do
  argument :post, :map, allow_nil?: false
  accept [...]
  change manage_relationship(:post, type: :append)
end

create :create_managed do
  primary? true
  accept [...]
end