Add the book eidtions registry to manage book editions.

lib/decentralised_book_index/metadata.ex

@@ -24,5 +24,7 @@ defmodule DecentralisedBookIndex.Metadata do
       define :update_author_alias_registry, action: :update
       define :destroy_author_alias_registry, action: :destroy
     end
+
+    resource DecentralisedBookIndex.Metadata.BookEditionsRegistry
   end
 end

lib/decentralised_book_index/metadata/book.ex

@@ -33,4 +33,8 @@ defmodule DecentralisedBookIndex.Metadata.Book do
 
     timestamps()
   end
+
+  relationships do
+    belongs_to :book_editions_registry, DecentralisedBookIndex.Metadata.BookEditionsRegistry
+  end
 end

lib/decentralised_book_index/metadata/book_editions_registry.ex

@@ -0,0 +1,31 @@
+defmodule DecentralisedBookIndex.Metadata.BookEditionsRegistry do
+  use Ash.Resource,
+    otp_app: :decentralised_book_index,
+    domain: DecentralisedBookIndex.Metadata,
+    data_layer: AshPostgres.DataLayer
+
+  postgres do
+    table "book_editions_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.Book
+  end
+end

priv/repo/migrations/20250308193833_create_book_editions_registy_and_update_book_relationships.exs

@@ -0,0 +1,58 @@
+defmodule DecentralisedBookIndex.Repo.Migrations.CreateBookEditionsRegistyAndUpdateBookRelationships 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(:books) do
+      add :book_editions_registry_id, :uuid
+    end
+
+    create table(:book_editions_registries, primary_key: false) do
+      add :id, :uuid, null: false, default: fragment("gen_random_uuid()"), primary_key: true
+    end
+
+    alter table(:books) do
+      modify :book_editions_registry_id,
+             references(:book_editions_registries,
+               column: :id,
+               name: "books_book_editions_registry_id_fkey",
+               type: :uuid,
+               prefix: "public"
+             )
+    end
+
+    alter table(:book_editions_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(:book_editions_registries) do
+      remove :updated_at
+      remove :inserted_at
+    end
+
+    drop constraint(:books, "books_book_editions_registry_id_fkey")
+
+    alter table(:books) do
+      modify :book_editions_registry_id, :uuid
+    end
+
+    drop table(:book_editions_registries)
+
+    alter table(:books) do
+      remove :book_editions_registry_id
+    end
+  end
+end

priv/resource_snapshots/repo/book_editions_registries/20250308193833.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": "0404DB6E78482892C260ABA34469476A75E6807C808B78413AF8BF113EFD9027",
+  "identities": [],
+  "multitenancy": {
+    "attribute": null,
+    "global": null,
+    "strategy": null
+  },
+  "repo": "Elixir.DecentralisedBookIndex.Repo",
+  "schema": null,
+  "table": "book_editions_registries"
+}

priv/resource_snapshots/repo/books/20250308193833.json

@@ -0,0 +1,108 @@
+{
+  "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": "title",
+      "type": "text"
+    },
+    {
+      "allow_nil?": false,
+      "default": "nil",
+      "generated?": false,
+      "primary_key?": false,
+      "references": null,
+      "size": null,
+      "source": "isbn",
+      "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": "books_book_editions_registry_id_fkey",
+        "on_delete": null,
+        "on_update": null,
+        "primary_key?": true,
+        "schema": "public",
+        "table": "book_editions_registries"
+      },
+      "size": null,
+      "source": "book_editions_registry_id",
+      "type": "uuid"
+    }
+  ],
+  "base_filter": null,
+  "check_constraints": [],
+  "custom_indexes": [],
+  "custom_statements": [],
+  "has_create_action": false,
+  "hash": "0EB9DD72D6C15F49DDAC97FC59931F963130A9A6002C1E08F7B567FDB1B886F0",
+  "identities": [],
+  "multitenancy": {
+    "attribute": null,
+    "global": null,
+    "strategy": null
+  },
+  "repo": "Elixir.DecentralisedBookIndex.Repo",
+  "schema": null,
+  "table": "books"
+}