mobilizon/priv/repo/migrations/20180530152323_make_actor_public_key_nullable.exs

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

  def up do
    alter table(:actors) do
      modify :public_key, :text, null: true
    end
  end

  def down do
    alter table(:actors) do
      modify :public_key, :text, null: false
    end
  end
end