Add the author alias registry to manage alias relationship.

Add datalayer and migrations.

lib/decentralised_book_index/metadata/author.ex

@@ -10,7 +10,17 @@ defmodule DecentralisedBookIndex.Metadata.Author do
   end
 
   actions do
-    defaults [:read]
+    defaults [:read, :update, :destroy]
+
+    update :add_author_to_alias_registry do
+      accept [:author_alias_registry_id]
+    end
+
+    create :create do
+      primary? true
+      accept [:name, :description, :author_alias_registry_id]
+
+    end
   end
 
   attributes do
@@ -28,4 +38,10 @@ defmodule DecentralisedBookIndex.Metadata.Author do
 
     timestamps()
   end
+
+  relationships do
+    belongs_to :author_alias_registry, DecentralisedBookIndex.Metadata.AuthorAliasRegistry do
+      attribute_writable? true
+    end
+  end
 end

lib/decentralised_book_index/metadata/author_alias_registry.ex

@@ -0,0 +1,31 @@
+defmodule DecentralisedBookIndex.Metadata.AuthorAliasRegistry do
+  use Ash.Resource,
+    otp_app: :decentralised_book_index,
+    domain: DecentralisedBookIndex.Metadata,
+    data_layer: AshPostgres.DataLayer
+
+  postgres do
+    table "author_alias_registries"
+    repo DecentralisedBookIndex.Repo
+  end
+
+  actions do
+    defaults [:read, :create, :update, :destroy]
+
+    read :by_id do
+      argument :id, :uuid, allow_nil?: false
+      get? true
+      filter expr(id == ^arg(:id))
+    end
+  end
+
+  attributes do
+    uuid_primary_key :id
+
+    timestamps()
+  end
+
+  relationships do
+    has_many :authors, DecentralisedBookIndex.Metadata.Author
+  end
+end

priv/repo/migrations/20250306194335_create_author_alias_registy_and_update_author_relationships.exs

@@ -0,0 +1,58 @@
+defmodule DecentralisedBookIndex.Repo.Migrations.CreateAuthorAliasRegistyAndUpdateAuthorRelationships do
+  @moduledoc """
+  Updates resources based on their most recent snapshots.
+
+  This file was autogenerated with `mix ash_postgres.generate_migrations`
+  """
+
+  use Ecto.Migration
+
+  def up do
+    alter table(:authors) do
+      add :author_alias_registry_id, :uuid
+    end
+
+    create table(:author_alias_registries, primary_key: false) do
+      add :id, :uuid, null: false, default: fragment("gen_random_uuid()"), primary_key: true
+    end
+
+    alter table(:authors) do
+      modify :author_alias_registry_id,
+             references(:author_alias_registries,
+               column: :id,
+               name: "authors_author_alias_registry_id_fkey",
+               type: :uuid,
+               prefix: "public"
+             )
+    end
+
+    alter table(:author_alias_registries) do
+      add :inserted_at, :utc_datetime_usec,
+        null: false,
+        default: fragment("(now() AT TIME ZONE 'utc')")
+
+      add :updated_at, :utc_datetime_usec,
+        null: false,
+        default: fragment("(now() AT TIME ZONE 'utc')")
+    end
+  end
+
+  def down do
+    alter table(:author_alias_registries) do
+      remove :updated_at
+      remove :inserted_at
+    end
+
+    drop constraint(:authors, "authors_author_alias_registry_id_fkey")
+
+    alter table(:authors) do
+      modify :author_alias_registry_id, :uuid
+    end
+
+    drop table(:author_alias_registries)
+
+    alter table(:authors) do
+      remove :author_alias_registry_id
+    end
+  end
+end

priv/resource_snapshots/repo/author_alias_registries/20250306194335.json

@@ -0,0 +1,49 @@
+{
+  "attributes": [
+    {
+      "allow_nil?": false,
+      "default": "fragment(\"gen_random_uuid()\")",
+      "generated?": false,
+      "primary_key?": true,
+      "references": null,
+      "size": null,
+      "source": "id",
+      "type": "uuid"
+    },
+    {
+      "allow_nil?": false,
+      "default": "fragment(\"(now() AT TIME ZONE 'utc')\")",
+      "generated?": false,
+      "primary_key?": false,
+      "references": null,
+      "size": null,
+      "source": "inserted_at",
+      "type": "utc_datetime_usec"
+    },
+    {
+      "allow_nil?": false,
+      "default": "fragment(\"(now() AT TIME ZONE 'utc')\")",
+      "generated?": false,
+      "primary_key?": false,
+      "references": null,
+      "size": null,
+      "source": "updated_at",
+      "type": "utc_datetime_usec"
+    }
+  ],
+  "base_filter": null,
+  "check_constraints": [],
+  "custom_indexes": [],
+  "custom_statements": [],
+  "has_create_action": true,
+  "hash": "B99F9DEA022478D48097625B854593389263945E08965F78B54D41A7D6D16696",
+  "identities": [],
+  "multitenancy": {
+    "attribute": null,
+    "global": null,
+    "strategy": null
+  },
+  "repo": "Elixir.DecentralisedBookIndex.Repo",
+  "schema": null,
+  "table": "author_alias_registries"
+}

priv/resource_snapshots/repo/authors/20250306194335.json

@@ -0,0 +1,98 @@
+{
+  "attributes": [
+    {
+      "allow_nil?": false,
+      "default": "fragment(\"gen_random_uuid()\")",
+      "generated?": false,
+      "primary_key?": true,
+      "references": null,
+      "size": null,
+      "source": "id",
+      "type": "uuid"
+    },
+    {
+      "allow_nil?": false,
+      "default": "nil",
+      "generated?": false,
+      "primary_key?": false,
+      "references": null,
+      "size": null,
+      "source": "name",
+      "type": "text"
+    },
+    {
+      "allow_nil?": false,
+      "default": "nil",
+      "generated?": false,
+      "primary_key?": false,
+      "references": null,
+      "size": null,
+      "source": "description",
+      "type": "text"
+    },
+    {
+      "allow_nil?": false,
+      "default": "fragment(\"(now() AT TIME ZONE 'utc')\")",
+      "generated?": false,
+      "primary_key?": false,
+      "references": null,
+      "size": null,
+      "source": "inserted_at",
+      "type": "utc_datetime_usec"
+    },
+    {
+      "allow_nil?": false,
+      "default": "fragment(\"(now() AT TIME ZONE 'utc')\")",
+      "generated?": false,
+      "primary_key?": false,
+      "references": null,
+      "size": null,
+      "source": "updated_at",
+      "type": "utc_datetime_usec"
+    },
+    {
+      "allow_nil?": true,
+      "default": "nil",
+      "generated?": false,
+      "primary_key?": false,
+      "references": {
+        "deferrable": false,
+        "destination_attribute": "id",
+        "destination_attribute_default": null,
+        "destination_attribute_generated": null,
+        "index?": false,
+        "match_type": null,
+        "match_with": null,
+        "multitenancy": {
+          "attribute": null,
+          "global": null,
+          "strategy": null
+        },
+        "name": "authors_author_alias_registry_id_fkey",
+        "on_delete": null,
+        "on_update": null,
+        "primary_key?": true,
+        "schema": "public",
+        "table": "author_alias_registries"
+      },
+      "size": null,
+      "source": "author_alias_registry_id",
+      "type": "uuid"
+    }
+  ],
+  "base_filter": null,
+  "check_constraints": [],
+  "custom_indexes": [],
+  "custom_statements": [],
+  "has_create_action": true,
+  "hash": "490E9E7EB08795DE4BD8A1B1A01EAF8B0CCD813B9F659BD56658CA9B069C140F",
+  "identities": [],
+  "multitenancy": {
+    "attribute": null,
+    "global": null,
+    "strategy": null
+  },
+  "repo": "Elixir.DecentralisedBookIndex.Repo",
+  "schema": null,
+  "table": "authors"
+}