Extract artist_changeset/2 to Artist module

lib/music_library/records/artist.ex

@@ -1,10 +1,18 @@
 defmodule MusicLibrary.Records.Artist do
   use Ecto.Schema
 
+  import Ecto.Changeset
+
   @primary_key {:musicbrainz_id, :binary_id, autogenerate: false}
   embedded_schema do
     field :name, :string
     field :sort_name, :string
     field :disambiguation, :string
   end
+
+  def changeset(artist, attrs) do
+    artist
+    |> cast(attrs, [:name, :sort_name, :disambiguation, :musicbrainz_id])
+    |> validate_required([:name, :sort_name, :musicbrainz_id])
+  end
 end

lib/music_library/records/record.ex

@@ -71,13 +71,6 @@ defmodule MusicLibrary.Records.Record do
     Enum.count(record.included_release_group_ids)
   end
 
-  @doc false
-  def artist_changeset(artist, attrs) do
-    artist
-    |> cast(attrs, [:name, :sort_name, :disambiguation, :musicbrainz_id])
-    |> validate_required([:name, :sort_name, :musicbrainz_id])
-  end
-
   def add_artists(record, artists_attrs) do
     record
     |> change()