First pass at record sets

lib/music_library/record_sets/record_set.ex

@@ -0,0 +1,24 @@
+defmodule MusicLibrary.RecordSets.RecordSet do
+  use Ecto.Schema
+
+  import Ecto.Changeset
+
+  alias MusicLibrary.RecordSets.RecordSetItem
+
+  @primary_key {:id, :binary_id, autogenerate: true}
+  @foreign_key_type :binary_id
+  schema "record_sets" do
+    field :name, :string
+    field :description, :string
+
+    has_many :items, RecordSetItem, preload_order: [asc: :position]
+
+    timestamps(type: :utc_datetime)
+  end
+
+  def changeset(record_set, attrs) do
+    record_set
+    |> cast(attrs, [:name, :description])
+    |> validate_required([:name])
+  end
+end

lib/music_library/record_sets/record_set_item.ex

@@ -0,0 +1,25 @@
+defmodule MusicLibrary.RecordSets.RecordSetItem do
+  use Ecto.Schema
+
+  import Ecto.Changeset
+
+  alias MusicLibrary.Records.Record
+  alias MusicLibrary.RecordSets.RecordSet
+
+  @primary_key {:id, :binary_id, autogenerate: true}
+  @foreign_key_type :binary_id
+  schema "record_set_items" do
+    field :position, :integer
+
+    belongs_to :record_set, RecordSet
+    belongs_to :record, Record
+
+    timestamps(type: :utc_datetime)
+  end
+
+  def changeset(record_set_item, attrs) do
+    record_set_item
+    |> cast(attrs, [:position])
+    |> validate_required([:position])
+  end
+end