Add the attribute for a cover image url for Book.

lib/decentralised_book_index/metadata.ex

@@ -39,6 +39,7 @@ defmodule DecentralisedBookIndex.Metadata do
       define :get_book_alternative_editions, args: [:book], action: :get_alternative_editions
       define :get_author_books, args: [:author], action: :get_author_books
       define :update_book, action: :update
+      define :assign_book_cover_image, args: [:cover_image_url], action: :assign_cover_image
       define :destroy_book, action: :destroy
     end
 

lib/decentralised_book_index/metadata/book.ex

@@ -100,6 +100,10 @@ defmodule DecentralisedBookIndex.Metadata.Book do
         |> Ash.Query.filter(expr(exists(author_roles, author_id in ^author_ids)))
       end
     end
+
+    update :assign_cover_image do
+      accept [:cover_image_url]
+    end
   end
 
   attributes do
@@ -135,6 +139,11 @@ defmodule DecentralisedBookIndex.Metadata.Book do
       public? true
     end
 
+    attribute :cover_image_url, :string do
+      allow_nil? true
+      public? true
+    end
+
     timestamps()
   end
 

priv/repo/migrations/20250316063123_update_book_to_add_cover_image_url.exs

@@ -0,0 +1,21 @@
+defmodule DecentralisedBookIndex.Repo.Migrations.UpdateBookToAddCoverImageUrl 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 :cover_image_url, :text
+    end
+  end
+
+  def down do
+    alter table(:books) do
+      remove :cover_image_url
+    end
+  end
+end

priv/resource_snapshots/repo/books/20250316063123.json

@@ -0,0 +1,177 @@
+{
+  "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": "description",
+      "type": "text"
+    },
+    {
+      "allow_nil?": false,
+      "default": "nil",
+      "generated?": false,
+      "primary_key?": false,
+      "references": null,
+      "size": null,
+      "source": "published",
+      "type": "date"
+    },
+    {
+      "allow_nil?": false,
+      "default": "nil",
+      "generated?": false,
+      "primary_key?": false,
+      "references": null,
+      "size": null,
+      "source": "language",
+      "type": "text"
+    },
+    {
+      "allow_nil?": false,
+      "default": "nil",
+      "generated?": false,
+      "primary_key?": false,
+      "references": null,
+      "size": null,
+      "source": "format",
+      "type": "text"
+    },
+    {
+      "allow_nil?": false,
+      "default": "nil",
+      "generated?": false,
+      "primary_key?": false,
+      "references": null,
+      "size": null,
+      "source": "page_count",
+      "type": "bigint"
+    },
+    {
+      "allow_nil?": true,
+      "default": "nil",
+      "generated?": false,
+      "primary_key?": false,
+      "references": null,
+      "size": null,
+      "source": "cover_image_url",
+      "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"
+    },
+    {
+      "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_publisher_id_fkey",
+        "on_delete": null,
+        "on_update": null,
+        "primary_key?": true,
+        "schema": "public",
+        "table": "publishers"
+      },
+      "size": null,
+      "source": "publisher_id",
+      "type": "uuid"
+    }
+  ],
+  "base_filter": null,
+  "check_constraints": [],
+  "custom_indexes": [],
+  "custom_statements": [],
+  "has_create_action": true,
+  "hash": "6CC39E25B6B35E3FB69403004A0FB96AD52450E21FC6D6725F349F7B3705B3B7",
+  "identities": [],
+  "multitenancy": {
+    "attribute": null,
+    "global": null,
+    "strategy": null
+  },
+  "repo": "Elixir.DecentralisedBookIndex.Repo",
+  "schema": null,
+  "table": "books"
+}

test/decentralised_book_index/metadata/book_test.exs

@@ -102,21 +102,21 @@ defmodule DecentralisedBookIndex.Metadata.BookTest do
 
       {:ok, book} = Metadata.create_book("Book", "An description", "English", "Paperback", 256, ~D[2025-03-04], bids, author_roles, publisher.id)
 
-      author_roles = [
+      author_roles2 = [
         %{order: 1, author_id: alias1.id, role: ""}
       ]
       bids2 = bids()
       publisher2 = generate(publisher())
 
-      {:ok, book2} = Metadata.create_book("Book2", "An description", "English", "Paperback", 256, ~D[2025-03-04], bids, author_roles, publisher2.id)
+      {:ok, book2} = Metadata.create_book("Book2", "An description", "English", "Paperback", 256, ~D[2025-03-04], bids2, author_roles2, publisher2.id)
 
-      author_roles = [
+      author_roles3 = [
         %{order: 1, author_id: alias2.id, role: ""}
       ]
       bids3 = bids()
       publisher3 = generate(publisher())
 
-      {:ok, book3} = Metadata.create_book("Book3", "An description", "English", "Paperback", 256, ~D[2025-03-04], bids, author_roles, publisher3.id)
+      {:ok, book3} = Metadata.create_book("Book3", "An description", "English", "Paperback", 256, ~D[2025-03-04], bids3, author_roles3, publisher3.id)
 
       assert {:ok, books} = Metadata.get_author_books(author)
 
@@ -138,4 +138,15 @@ defmodule DecentralisedBookIndex.Metadata.BookTest do
       assert expected_book.id == book.id
     end
   end
+
+  describe "book's cover image" do
+    test "update cover image" do
+      cover_image_url = "/images/book.avif"
+
+      book = generate(book())
+
+      assert {:ok, book} = Metadata.assign_book_cover_image(book, cover_image_url)
+      assert book.cover_image_url == cover_image_url
+    end
+  end
 end