debianize-mobilizon/priv/repo/migrations/20180816093446_add_primary_key_to_member.exs

defmodule Mobilizon.Repo.Migrations.AddPrimaryKeyToMember do
  use Ecto.Migration

  def up do
    execute("ALTER TABLE members DROP CONSTRAINT IF EXISTS members_pkey")
    drop_if_exists index(:members, ["members_account_id_index"])
    create unique_index(:members, [:actor_id, :parent_id], name: :members_actor_parent_unique_index)
    alter table(:members) do
      add :id, :serial, primary_key: true
    end
  end

  def down do
    drop index(:members, [:actor_id, :parent_id], name: :members_actor_parent_unique_index)
    alter table(:members) do
      remove :id
    end
  end
end