Sekisho's tables, in a migration of your app.

$ mix sekisho.gen.migration

writes a migration that pins the latest version:

defmodule MyApp.Repo.Migrations.AddSekisho do
  use Ecto.Migration

  def up, do: Sekisho.Migrations.up(version: 1)
  def down, do: Sekisho.Migrations.down(to: 0)
end

The versions are PhoenixMountable.Migrations, tracked in your database. A later version of Sekisho that changes its tables has a new version, and mix sekisho.gen.migration writes the migration that upgrades.

The ids of the grants are of the type of your app's records: :id (bigint) or :binary_id (uuid), from your repo's :migration_primary_key, or up(version: 1, primary_key: :binary_id). It is kept with the version, so later versions use it too.

Version 1 makes sekisho_grants (Sekisho.Grant) and sekisho_roles (Sekisho.Role).