defmodule Nulla.Repo.Migrations.CreateActorRelations do
  use Ecto.Migration

  def change do
    create table(:relations, primary_key: false) do
      add :id, :bigint, primary_key: true
      add :source_id, :bigint, null: false
      add :target_id, :bigint, null: false
      add :type, :string, null: false
      add :status, :string, null: false
      add :activity_id, :bigint

      timestamps()
    end

    create index(:relations, [:source_id])
    create index(:relations, [:target_id])
    create index(:relations, [:type])
    create index(:relations, [:activity_id])

    create unique_index(:relations, [:source_id, :target_id, :type])
  end
end