add range mode

priv/repo/migrations/20220214031736_create_shot_groups.exs

@@ -0,0 +1,25 @@
+defmodule Cannery.Repo.Migrations.CreateShotGroups do
+  use Ecto.Migration
+
+  def change do
+    create table(:shot_groups, primary_key: false) do
+      add :id, :binary_id, primary_key: true
+      add :count, :integer
+      add :notes, :string
+      add :date, :date
+
+      add :user_id, references(:users, on_delete: :delete_all, type: :binary_id)
+      add :ammo_group_id, references(:ammo_groups, on_delete: :delete_all, type: :binary_id)
+
+      timestamps()
+    end
+
+    create index(:shot_groups, [:id])
+    create index(:shot_groups, [:user_id])
+    create index(:shot_groups, [:ammo_group_id])
+
+    alter table(:ammo_groups) do
+      add :staged, :boolean, null: false, default: false
+    end
+  end
+end