Ash FrameworkAF
Ash Framework•3y ago•
33 replies
Kevin Schweikert

Create Resource without relation

Hey guys, I'm dipping my toes into Ash and try to build a small thing, but now I'm stuck. I created a resource and a relationship. I want to create the resource, but the relationship can be empty. But when I try to create the resource, I get this error:

iex(5)> Inventizr.Inventory.Item |> Ash.Changeset.for_create(:new, %{model: "MacBook", brand: "Apple"}) |> Inventizr.Inventory.create!()
[debug] QUERY OK db=2.3ms idle=1636.8ms
begin []
[debug] QUERY OK db=2.4ms
rollback []
** (UndefinedFunctionError) function Ash.NotLoaded.__changeset__/0 is undefined or private
    (ash 2.5.10) Ash.NotLoaded.__changeset__()
    (ecto 3.9.4) lib/ecto/changeset.ex:409: Ecto.Changeset.change/2
    (ecto 3.9.4) lib/ecto/changeset/relation.ex:173: Ecto.Changeset.Relation.do_change/4
    (ecto 3.9.4) lib/ecto/changeset/relation.ex:335: Ecto.Changeset.Relation.single_change/5
    (ecto 3.9.4) lib/ecto/changeset/relation.ex:165: Ecto.Changeset.Relation.change/3
...


The resource is defined as:

defmodule Inventizr.Inventory.Item do
  use Ash.Resource,
    data_layer: AshPostgres.DataLayer

  attributes do
    uuid_primary_key :id

    attribute :brand, :string
    attribute :model, :string

    attribute :status, :atom do
      constraints one_of: [:available, :in_use, :defect, :unavailable]
      default :available
      allow_nil? false
    end
  end

  relationships do
    belongs_to :user, Inventizr.Accounts.User do
      api Inventizr.Accounts
      allow_nil? true
    end
  end
end


And the corresponding relation:

  attributes do
    uuid_primary_key :id
    attribute :name, :string
  end

  relationships do
    has_many :items, Inventizr.Inventory.Item do
      api Inventizr.Inventory
    end
  end
end


I can't figure out, what I'm doing wrong, because it works like this in the getting started guide: https://ash-hq.org/docs/guides/ash/latest/tutorials/get-started#working-with-relationships. I'm sure I'm missing something obvious...
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